Contents

Yamaha 150TXR Owner's Manual PDF

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Summary of Content for Yamaha 150TXR Owner's Manual PDF

150

OWNERS MANUAL

64C-28199-1F

U.S.A.Edition LIT-18626-07-96

q Read this manual carefully before operating this outboard motor.

64C-9-1F Hyoshi 08.2.29 3:26 PM 1

EMU25062

ZMU01690

Read this manual carefully before operating this outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.

64C-9-1F Hyoshi 08.2.29 3:26 PM 2

Important manual information

EMU31283

To the owner

Thank you for choosing a Yamaha outboard motor. This Owners Manual contains infor- mation needed for proper operation, mainte- nance and care. A thorough understanding of these simple instructions will help you ob- tain maximum enjoyment from your new Yamaha. If you have any question about the operation or maintenance of your outboard motor, please consult a Yamaha dealer. In this Owners Manual particularly important information is distinguished in the following ways.

: This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that fol- low this symbol to avoid possible injury or death.

WARNING

EWM00781

A WARNING indicates a hazardous situa- tion which, if not avoided, could result in

death or serious injury.

NOTICE

ECM00701

A NOTICE indicates special precautions that must be taken to avoid damage to the

outboard motor or other property.

TIP:

A TIP provides key information to make pro- cedures easier or clearer.

Yamaha continually seeks advancements in product design and quality. Therefore, while this manual contains the most current prod- uct information available at the time of print- ing, there may be minor discrepancies between your machine and this manual. If

there is any question concerning this manu- al, please consult your Yamaha dealer.

TIP:

The 150TR and the standard accessories are used as a base for the explanations and illustrations in this manual. Therefore some items may not apply to every model.

EMU25111

150 OWNERS MANUAL

2008 by Yamaha Motor Corporation, USA 1st edition, April 2008

All rights reserved. Any reprinting or unauthorized use without the written permission of Yamaha Motor Corporation, USA

is expressly prohibited. Printed in Japan

P/N LIT-18626-07-96

Table of contents

Safety information............................. 1

Outboard motor safety .................... 1

Propeller............................................ 1 Rotating parts.................................... 1 Hot parts ........................................... 1 Electric shock.................................... 1 Power trim and tilt ............................. 1 Engine shut-off cord (lanyard)........... 1 Gasoline............................................ 1 Gasoline exposure and spills ............ 2 Carbon monoxide.............................. 2 Modifications ..................................... 2

Boating safety ................................. 2

Alcohol and drugs ............................. 2 Personal flotation devices ................. 2 People in the water ........................... 2 Passengers ....................................... 2 Overloading....................................... 2 Avoid collisions ................................. 3 Weather ............................................ 3 Accident reporting ............................. 3 Boat education and training .............. 3 Passenger training ............................ 4 Boating safety publications ............... 4 Laws and regulations ........................ 4

Boating organizations...................... 4 Basic boating rules (Rules of the

road) .............................................. 4

Steering and sailing rules and sound signals............................................. 5

Rules when encountering vessels .... 5 Other special situations..................... 6

General information .......................... 9

Identification numbers record.......... 9

Outboard motor serial number .......... 9 Key number....................................... 9

Read manuals and labels.............. 10

Warning labels ................................ 10

Specifications and requirements...13

Specifications ................................ 13 Installation requirements ............... 14

Boat horsepower rating................... 14 Mounting motor ............................... 14

Remote control requirements........ 14 Battery requirements..................... 14

Specifications of Battery..................14 Mounting battery .............................14 Multiple batteries .............................15

Propeller selection ........................ 15 Start-in-gear protection ................. 15 Engine oil requirements ................ 15 Fuel requirements ......................... 16

Gasoline ..........................................16 Ring Free Fuel Additive...................16

Muddy or acidic water ................... 17 Anti-fouling paint ........................... 17 Motor disposal requirements......... 17 Emergency equipment .................. 17 Emission control information......... 17

North American models...................17

Components .................................... 19

Components diagram.................... 19

Remote control box .........................19 Remote control lever .......................20 Neutral interlock trigger ...................20 Neutral throttle lever ........................20 Choke switch...................................21 Throttle friction adjuster...................21 Engine shut-off cord (lanyard) and

clip.................................................21 Choke knob for pull type .................22 Main switch .....................................22 Power trim and tilt switch on

remote control ...............................22 Power trim and tilt switch on

bottom engine cowling ..................23 Trim tab with anode.........................23 Tilt support lever for power trim and

tilt model........................................24 Top cowling lock lever (pull up

type) ..............................................24 Flushing device ...............................24

Instruments and indicators............ 26

Digital tachometer ......................... 26

Tachometer .....................................26 Trim meter .......................................26 Hour meter ......................................26 Oil level indicator (digital type) ........27 Overheat-alert indicator...................27

Digital speedometer ...................... 27

Table of contents

Speedometer .................................. 27 Fuel gauge ...................................... 28 Trip meter / Clock / Voltmeter ......... 28 Fuel level-alert indicator .................. 29 Low battery voltage-alert

indicator ........................................ 29

Analog tachometer ........................ 29

Oil level indicators (three indicators) ..................................... 29

Analog trim meter.......................... 30

Engine control system.................... 31

Alert system .................................. 31

Overheat alert ................................. 31 Oil level alert and oil filter clogging

alert............................................... 31

Installation ....................................... 33

Installation ..................................... 33

Mounting the outboard motor .......... 33

Operation ......................................... 35

First-time operation ....................... 35

Breaking in engine .......................... 35 Getting to know your boat ............... 35

Checks before starting engine ...... 35

Fuel level......................................... 36 Remove cowling.............................. 36 Fuel system..................................... 36 Controls........................................... 37 Engine shut-off cord (lanyard)......... 37 Oil.................................................... 37 Engine............................................. 37 Operation after a long period of

storage.......................................... 37 Flushing device ............................... 37 Install cowling.................................. 38 Checking power trim and tilt

system .......................................... 38 Battery............................................. 40

Filling fuel and engine oil............... 40

Filling fuel for models without a fuel joint ........................................ 40

Filling oil for oil injection models...... 40 Oil level indicator operation............. 42

Operating engine........................... 43

Feeding fuel .................................... 43 Starting engine................................ 43

Checks after starting engine ......... 45

Cooling water ..................................45

Warming up engine....................... 45

Choke start models .........................45

Checks after engine warm-up....... 45

Shifting ............................................45 Stop switches ..................................45

Shifting.......................................... 46 Stopping boat................................ 47 Stopping engine............................ 47

Procedure........................................47

Trimming outboard motor.............. 47

Adjusting trim angle (Power trim and tilt) ..........................................48

Adjusting boat trim ..........................48

Tilting up and down....................... 49

Procedure for tilting up (power trim and tilt models)..............................50

Procedure for tilting down (power trim and tilt models).......................51

Shallow water................................ 51

Power trim and tilt models...............51

Cruising in other conditions........... 52

Maintenance .................................... 53

Transporting and storing outboard motor ........................................... 53

Storing outboard motor ...................53 Procedure........................................53 Lubrication (oil injection models) .....54 Cleaning and anticorrosion

measures ......................................54 Flushing power unit .........................55 Cleaning the outboard motor...........55 Checking painted surface of

motor.............................................56

Periodic maintenance ................... 56

Replacement parts ..........................56 Maintenance interval guidelines......56 Maintenance chart 1........................58 Maintenance chart 2........................60 Greasing..........................................61 Cleaning and adjusting spark

plug ...............................................61 Checking fuel filter...........................62 Inspecting idling speed....................62

Table of contents

Checking water in engine oil tank ... 63 Checking wiring and connectors ..... 63 Checking propeller .......................... 63 Removing propeller ......................... 64 Installing propeller ........................... 64 Changing gear oil ............................ 65 Inspecting and replacing

anode(s)........................................ 66 Checking battery (for electric start

models) ......................................... 67 Connecting the battery .................... 67 Disconnecting the battery ............... 68

Trouble Recovery............................ 69

Troubleshooting ............................ 69 Temporary action in emergency.... 72

Impact damage ............................... 72 Replacing fuse ................................ 72 Power trim and tilt will not

operate.......................................... 73 Starter will not operate .................... 73 Emergency starting engine ............. 74

Engine fails to operate .................. 75

Ignition system malfunction............. 75 Low oil level alert activates ............. 75

Treatment of submerged motor..... 76

Consumer information.................... 77

Important warranty information for U.S.A. and Canada ..................... 77

YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY ...... 79

IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA .............. 82

1

Safety information

EMU33622

Outboard motor safety

Observe these precautions at all times.

EMU36500

Propeller

People can be injured or killed if they come in contact with the propeller. The propeller can keep moving even when the motor is in neutral, and sharp edges of the propeller can cut even when stationary.

Shut off the engine when a person is in the water near you.

Keep people out of reach of the propeller, even when the engine is off.

EMU33630

Rotating parts

Hands, feet, hair, jewelry, clothing, PFD straps, etc. can become entangled with inter- nal rotating parts of the engine, resulting in serious injury or death. Keep the top cowling in place whenever pos- sible. Do not remove or replace the cowling with the engine running. Only operate the engine with the cowling re- moved according to the specific instructions in the manual. Keep hands, feet, hair, jewel- ry, clothing, PFD straps, etc. away from any exposed moving parts.

EMU33640

Hot parts

During and after operation, engine parts are hot enough to cause burns. Avoid touching any parts under the top cowling until the en- gine has cooled.

EMU33650

Electric shock

Do not touch any electrical parts while start- ing or operating the engine. They can cause shock or electrocution.

EMU33660

Power trim and tilt

Body parts can be crushed between the mo-

tor and the clamp bracket when the motor is trimmed or tilted. Keep body parts out of this area at all times. Be sure no one is in this area before operating the power trim and tilt mechanism. The power trim and tilt switches operate even when the main switch is off. Keep peo- ple be away from the switches whenever working around the motor. Never get under the lower unit while it is tilt- ed, even when the tilt support lever is locked. Severe injury could occur if the outboard mo- tor accidentally falls.

EMU33671

Engine shut-off cord (lanyard)

Attach the engine shut-off cord so that the engine stops if the operator falls overboard or leaves the helm. This prevents the boat from running away under power and leaving people stranded, or running over people or objects. Always attach the engine shut-off cord to a secure place on your clothing or your arm or leg while operating. Do not remove it to leave the helm while the boat is moving. Do not at- tach the cord to clothing that could tear loose, or route the cord where it could be- come entangled, preventing it from function- ing. Do not route the cord where it is likely to be accidentally pulled out. If the cord is pulled during operation, the engine will shut off and you will lose most steering control. The boat could slow rapidly, throwing people and ob- jects forward.

EMU33810

Gasoline

Gasoline and its vapors are highly flam- mable and explosive.

Always, refuel ac- cording to the procedure on page 43 to reduce the risk of fire and explosion.

Safety information

2

EMU33820

Gasoline exposure and spills

Take care not to spill gasoline. If gasoline spills, wipe it up immediately with dry rags. Dispose of rags properly. If any gasoline spills onto your skin, immedi- ately wash with soap and water. Change clothing if gasoline spills on it. If you swallow gasoline, inhale a lot of gaso- line vapor, or get gasoline in your eyes, get immediate medical attention. Never siphon fuel by mouth.

EMU33900

Carbon monoxide

This product emits exhaust gases which contain carbon monoxide, a colorless, odor- less gas which may cause brain damage or death when inhaled. Symptoms include nau- sea, dizziness, and drowsiness. Keep cock- pit and cabin areas well ventilated. Avoid blocking exhaust outlets.

EMU33780

Modifications

Do not attempt to modify this outboard mo- tor. Modifications to your outboard motor may reduce safety and reliability, and render the outboard unsafe or illegal to use.

EMU33740

Boating safety

This section includes a few of the many im- portant safety precautions that you should follow when boating.

EMU33710

Alcohol and drugs

Never operate after drinking alcohol or tak- ing drugs. Intoxication is one of the most common factors contributing to boating fatal- ities.

EMU33720

Personal flotation devices

Have an approved personal flotation device (PFD) on board for every occupant. Yamaha

recommends that you must wear a PFD whenever boating. At a minimum, children and non-swimmers should always wear PFDs, and everyone should wear PFDs when there are potentially hazardous boat- ing conditions.

EMU33730

People in the water

Always watch carefully for people in the wa- ter, such as swimmers, skiers, or divers, whenever the engine is running. When someone is in the water near the boat, shift into neutral and shut off the motor. Stay away from swimming areas. Swimmers can be hard to see. The propeller can keep moving even when the motor is in neutral. Shut off the engine when a person is in the water near you.

EMU33750

Passengers

Consult your boat manufacturers instruc- tions for details about appropriate passenger locations in your boat and be sure all pas- sengers are positioned properly before ac- celerating and when operating above an idle speed. Standing or sitting in non-designated locations may result in being thrown either overboard or within the boat due to waves, wakes, or sudden changes in speed or direc- tion. Even when people are positioned prop- erly, alert your passengers if you must make any unusual maneuver. Always avoid jump- ing waves or wakes.

EMU33760

Overloading

Do not overload the boat. Consult the boat capacity plate or boat manufacturer for max- imum weight and number of passengers. Be sure that weight is properly distributed ac- cording to the boat manufacturers instruc- tions. Overloading or incorrect weight distribution can compromise the boats han-

Safety information

3

dling and lead to an accident, capsizing or swamping.

EMU33771

Avoid collisions

Scan constantly

for people, objects, and other boats. Be alert for conditions that limit your visibility or block your vision of others.

Operate defensively

at safe speeds and keep a safe distance away from people, ob- jects, and other boats.

Do not follow directly behind other boats or waterskiers.

Avoid sharp turns or other maneuvers that make it hard for others to avoid you or un- derstand where you are going.

Avoid areas with submerged objects or shallow water.

Ride within your limits and avoid aggres- sive maneuvers to reduce the risk of loss of control, ejection, and collision.

Take early action

to avoid collisions. Re- member,

boats do not have brakes

, and stopping the engine or reducing throttle can reduce the ability to steer. If you are not sure that you can stop in time before hitting an obstacle, apply throttle and turn in another direction.

EMU33790

Weather

Stay informed about the weather. Check weather forecasts before boating. Avoid

boating in hazardous weather.

EMU33800

Accident reporting

Boat operators are required by law to file a Boating Accident Report with their state boating law enforcement agency if their boat is involved in any of the following accidents: 1. There is loss of life or probable loss of

life. 2. There is personal injury that requires

medical attention beyond first aid. 3. There is property damage to boats or

other property over a certain amount. 4. There is complete loss of a boat. Contact local law enforcement personnel if a report is necessary.

EMU33870

Boat education and training

Operators should take a boating safety course. This may be required in your state. Many of the organizations listed in the next section can provide information about cours- es in your area. You may also want to consider an Internet- based program for basic boater education. The Online Boating Safety Course provided by the BoatU.S. Foundation, is approved by the National Association of State Boating Law Administrators (NASBLA) and recog- nized by the United States Coast Guard. Most, but not all, states accept this course to meet their minimum requirements. While it cannot replace an in-depth course such as one offered by the U.S. Coast Guard, U.S. Power Squadron, or other organization, this online course does provide a general over- view of the basics in boating safety, require- ments, navigation, and operation. Upon successful completion of the course, the user can download a certificate of comple- tion immediately or, for a small charge, re- quest one by mail. To take this free course,

ZMU06025

Safety information

4

go to boatus.org.

EMU33880

Passenger training

Make sure at least one other passenger is trained to operate the boat in the event of an emergency.

EMU33890

Boating safety publications

Be informed about boating safety. Additional publications and information can be obtained from many boating organizations.

EMU33590

Laws and regulations

Know the marine laws and regulations where you will be boating- and obey them. Several sets of rules prevail according to geographic location, but all are basically the same as the International Rules of the Road. The rules presented in the following section are con- densed- and have been provided for your convenience only. Contact the U.S. Coast Guard, the National Association of State Boating Law Adminis- trators, or your local Power Squadron for a complete set of rules governing the waters in which you will be using your boat.

EMU33680

Boating organizations

The following organizations provide boating safety training and information about boating safety and laws.

United States Coast Guard

Consumer Affairs Staff (G-BC) Office of Boating, Public, and Consumer Af- fairs U.S. Coast Guard Headquarters Washington, D.C. 20593-0001 Boating Safety Hotline: 1-800-368-5647 www.uscgboating.org

United States Power Squadrons

1-888-FOR-USPS (1-888-367-8777) www.usps.org

Boat Owners Association of The United States

1-800-336-BOAT (1-800-336-2628) www.boatus.com

National Association of State Boating Law Administrators (NASBLA)

1500 Leestown Road, Suite 330 Lexington, KY 4051 859-225-9497 859-225-9497 www.nasbla.org

National Marine Manufacturers Associa- tion (NMMA)

200 East Randolph Drive Suite 5100 Chicago, IL 606001 www.nmma.org

Marine Retailers Association of America

155 N. Michigan Ave. Chicago, IL 60601 www.mraa.com

EMU33690

Basic boating rules (Rules of the road)

Just as there are rules that apply when you are driving on streets and highways, there are waterway rules that apply when you are driving your boat. These rules are used inter- nationally. (For USA: and are also enforced by the United States Coast Guard and local agencies.) You should be aware of these rules, and follow them whenever you en- counter another vessel on the water.

Safety information

5

EMU33700

Steering and sailing rules and sound signals

Whenever two vessels on the water meet one another, one vessel has the right-of- way; it is called the stand-on vessel. The vessel that does not have the right-of-way is called the give-way or burdenedvessel. These rules determine which vessel has the right-of-way, and what each vessel should do.

Stand-on vessel

The vessel with the right-of-way has the duty to continue its course and speed, except to avoid an immediate collision. When you maintain your direction and speed, the other vessel will be able to determine how best to avoid you.

Give-way vessel

The vessel that does not have the right-of- way has the duty to take positive and timely action to stay out of the way of the Stand-On vessel. Normally, you should not cross in front of the vessel with the right-of-way. You should slow down or change directions brief- ly and pass behind the other vessel. You should always move in such a way that the operator of the other vessel can see what you are doing.

The general prudential rule

This rule is called Rule 2 in the International Rules and says, In obeying and construing these rules due regard shall be had to all dangers of naviga- tion and collision, and to any special circum- stances, which may render a departure from the above rules necessary in order to avoid immediate danger. In other words, follow the standard rules ex- cept when a collision will occur unless both

vessels try to avoid each other. If that is the case, both vessels become Give-Way vessels.

EMU25521

Rules when encountering vessels

There are three main situations that you may encounter with other vessels which could lead to a collision unless the Steering Rules are followed:

Meeting:

(you are approaching another ves- sel head-on)

Crossing:

(you are traveling across the oth- er vessels path)

Overtaking:

(you are passing or being passed by another vessel) In the following illustration, your boat is in the center. You should give the right-of-way to any vessels shown in white area (you are the Give-Way vessel). Any vessels in the shad- ed area must yield to you (they are the Give- Way vessels). Both you and the meeting vessel must alter course to avoid each other.

Meeting

If you are meeting another power vessel head on, and are close enough to run the risk of collision, neither of you has the right-of- way Both of you should alter course to avoid an accident. You should keep the other ves- sel on your port (left) side. This rule doesnt apply if both of you will clear one another if you continue on your set course and speed.

Safety information

6

Crossing

When two power driven vessels are crossing each others path close enough to run the risk of collision, the vessel which has the oth- er on the starboard (right) side must keep out of the way of the other. If the other vessel is on your right, you must keep out of its way; you are the Give-Way vessel. If the other vessel is on your port (left) side, remember that you should maintain course and direc- tion, provided the other vessel gives you the right-of-way as it should.

Overtaking

If you are passing another vessel, you are the Give-Way vessel. This means that the other vessel is expected to maintain its course and speed. You must stay out of its way until you are clear of it. Likewise, if an- other vessel is passing you, you should maintain your speed and direction so that the other vessel can steer itself around you.

EMU25531

Other special situations

There are three other rules you should be aware of when driving your boat around oth- er vessels.

Narrow channels and bends

When navigating in narrow channels, you should keep to the right when it is safe and practical to do so. If the operator of a power- driven vessel is preparing to go around a bend that may obstruct the view of other wa- ter vessels, the operator should sound a pro- longed blast on the whistle (4 to 6 seconds). If another vessel is around the bend, it too should sound the whistle. Even if no reply is heard, however, the vessel should still pro- ceed around the bend with caution. If you navigate such waters with your boat, you will need to carry a portable air horn, available from local marine supply stores.

Fishing vessel right-of-way

All vessels that are fishing with nets, lines or trawls are considered to be fishing vessels under the International Rules. Vessels with trolling lines are not considered fishing ves- sels. Fishing vessels have the right-of-way regardless of position. Fishing vessels can- not, however, impede the passage of other vessels in narrow channels.

Sailing vessel right-of-way

Sailing vessels should normally be given the right-of-way. The exceptions to this are: 1. When the sailing vessel is overtaking

the power-driven vessel, the power-driv- en vessel has the right-of-way.

2. Sailing vessels should keep clear of any fishing vessel.

3. In a narrow channel, a sailing vessel should not hamper the safe passage of a power-driven vessel that can navigate only in such a channel.

Safety information

7

Reading buoys and other markers

The waters of the United States are marked for safe navigation by the lateral system of buoyage. Simply put, buoys and markers have an arrangement of shapes, colors, numbers and lights to show which side of the buoy a boater should pass on when navigat- ing in a particular direction. The markings on these buoys are oriented from the perspec- tive of being entered from seaward (the boat- er is going towards the port). This means that red buoys are passed on the starboard (right) side when proceeding from open wa- ter into port, and black buoys are to port (left) side. When navigating out of port, your posi- tion with respect to the buoys should be re- versed; red buoys should be to port and black buoys to starboard. Many bodies of water used by boaters are entirely within the boundaries of a particular state. The Uniform State Waterway Marking System has been devised for these waters. This system uses buoys and signs with dis- tinctive shapes and colors to show regulato- ry or advisory information. These markers are white with black letters and orange boarders. They signify speed zones, restrict- ed areas, danger areas, and general infor- mation. Remember, markings may vary by geo- graphic location. Always consult local boat- ing authorities before driving your boat in unfamiliar waters.

Safety information

8

ZMU01708

9

General information

EMU25171

Identification numbers record

EMU25183

Outboard motor serial number

The outboard motor serial number is stamped on the label attached to the port side of the clamp bracket. Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your outboard motor is sto- len.

EMU25190

Key number

If a main key switch is equipped with the mo- tor, the key identification number is stamped on your key as shown in the illustration. Record this number in the space provided for reference in case you need a new key.

1. Outboard motor serial number location

1. Key number

General information

10

EMU33520

Read manuals and labels

Before operating or working on this motor:

Read this manual.

Read any manuals supplied with the boat.

Read all labels on the outboard motor and the boat. If you need any additional information, contact your Yamaha dealer.

EMU33831

Warning labels

If these labels are damaged or missing, contact your Yamaha dealer for replacements.

1 2

1

3

ZMU06216

General information

11

1 2

3

ZMU05670

General information

12

EMU33843

Symbols

The following symbols mean as follows.

Notice/Warning

Read Owners Manual

Hazard caused by continuous rotation

Electrical hazard

Remote control lever/gear shift lever operat- ing direction, dual direction

Engine start/ Engine cranking

ZMU05696

ZMU05664

ZMU05665

ZMU05666

ZMU05667

ZMU05668

13

Specifications and requirements

EMU31480

Specifications TIP:

(AL) stated in the specification data below represents the numerical value for the alumi- num propeller installed. Likewise, (SUS) represents the value for stainless steel propeller installed and (PL) for plastic propeller installed.

EMU2821C

Dimension:

Overall length: 823 mm (32.4 in)

Overall width: 577 mm (22.7 in)

Overall height X: 1742 mm (68.6 in)

Transom height X: 642 mm (25.3 in)

Weight (without propeller) X: 194.0 kg (428 lb)

Performance:

Full throttle operating range: 45005500 r/min

Maximum output: 110.3 kW@5000 r/min (150 HP@5000 r/min)

Idling speed (in neutral): 700

25 r/min

Engine:

Type: 2-stroke V

Displacement: 2596.0 cm

3

Bore

stroke: 90.0

68.0 mm (3.54

2.68 in) Ignition system:

CDI (micro computer) Spark plug (NGK):

BR7HS-10

Spark plug gap: 0.91.0 mm (0.0350.039 in)

Control system: Remote control

Starting system: Electric

Starting carburetion system: Choke valve

Min. cold cranking amps (CCA/SAE): 380.0 A

Min. marine cranking amps (MCA/ABYC): 502.0 A

Min. reserve capacity (RC/SAE): 124 minutes

Maximum generator output: 25.0 A

Drive unit:

Gear positions: Forward-neutral-reverse

Gear ratio: 1.86 (26/14)

Trim and tilt system: Power trim and tilt

Propeller mark: M

Fuel and oil:

Recommended fuel: Regular unleaded gasoline

Min. pump octane: 86

Recommended engine oil: YAMALUBE 2-stroke outboard motor oil

Lubrication: Oil injection

Engine oil tank capacity: 0.9 L (0.95 US qt, 0.79 Imp.qt)

Remote oil tank capacity: 10.5 L (11.10 US qt, 9.24 Imp.qt)

Recommended gear oil: Hypoid gear oil SAE#90

Specifications and requirements

14

Gear oil quantity: 0.980 L (1.036 US qt, 0.862 Imp.qt)

Tightening torque for engine:

Spark plug: 25.0 Nm (2.55 kgf-m, 18.4 ft-lb)

Propeller nut: 55.0 Nm (5.61 kgf-m, 40.6 ft-lb)

EMU33553

Installation requirements

EMU33563

Boat horsepower rating

WARNING

EWM01560

Overpowering a boat can cause severe

instability.

Before installing the outboard motor(s), con- firm that the total horsepower of your mo- tor(s) does not exceed the boats maximum horsepower rating. See the boats capacity plate or contact the manufacturer.

EMU33571

Mounting motor

WARNING

EWM01570

Improper mounting of the outboard mo- tor could result in hazardous condi- tions such as poor handling, loss of control, or fire hazards.

Because the motor is very heavy, spe- cial equipment and training is required

to mount it safely.

Your dealer or other person experienced in proper rigging should mount the motor using correct equipment and complete rigging in- structions. For further information, see page 33.

EMU33581

Remote control requirements

WARNING

EWM01580

If the engine starts in gear, the boat can

move suddenly and unexpectedly, pos- sibly causing a collision or throwing passengers overboard.

If the engine ever starts in gear, the start-in-gear protection device is not working correctly and you should dis- continue using the outboard. Contact

your Yamaha dealer.

The remote control unit must be equipped with a start-in-gear protection device(s). This device prevents the engine from starting un- less it is in neutral.

EMU25694

Battery requirements

EMU25713

Specifications of Battery

Use a fully charged battery that meets the following specifications. The engine cannot be started if battery voltage is too low.

NOTICE

ECM01061

Do not use a battery that does not meet the specified capacity. If a battery that does not meet specifications is used, the electric system could perform poorly or be overloaded, causing electric system

damage.

EMU36290

Mounting battery

Mount the battery holder securely in a dry, well-ventilated, vibration-free location in the

Minimum cold cranking amps (CCA/ SAE):

380.0 A Minimum marine cranking amps (MCA/ ABYC):

502.0 A Minimum reserve capacity (RC/SAE):

124 minutes

Specifications and requirements

15

boat.

WARNING! Do not put flammable items, or loose heavy or metal objects in the same compartment as the battery. Fire, explosion or sparks could result.

[EWM01820]

EMU36300

Multiple batteries

To connect multiple batteries, such as for multiple engine configurations or for an ac- cessory battery, consult your Yamaha dealer about battery selection and correct wiring.

EMU34191

Propeller selection

Next to selecting an outboard, choosing the right propeller is one of the most important purchasing decisions a boater can make. The type, size, and design of your propeller have a direct impact on acceleration, top speed, fuel economy, and even engine life. Yamaha designs and manufactures propel- lers for every Yamaha outboard motor and every application. Your outboard motor came with a Yamaha propeller chosen to perform well over a range of applications, but there may be uses where a different propeller would be more appropriate. Your Yamaha dealer can help you select the right propeller for your boating needs. Select a propeller that will allow the engine to reach the middle or upper half of the operating range at full throttle with the maximum boat- load. Generally, chose a larger pitch propel- ler for a smaller operating load and a smaller pitch propeller for a heavier load. If you carry loads that vary widely, chose the propeller that lets the engine run in the proper range for your maximum load but remember that you may need to reduce your throttle setting to stay within the recommended engine speed range when carrying lighter loads.

For instructions on propeller removal and in- stallation, see page 63.

EMU25770

Start-in-gear protection

Yamaha outboard motors or Yamaha-ap- proved remote control units are equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is in neutral. Always select neutral before starting the engine.

EMU25661

Engine oil requirements

Use Yamalube 2-M outboard oil. If Ya- malube 2-M is not available, use only anoth- er outboard motor manufacturers factory- brand oil with TC-W3 rating.

NOTICE

ECM01290

Serious engine damage can result from the use of lower quality oil, including some commonly available oil brands with TC-W3 on their label. To avoid the risk, use only Yamalube 2-M or, if necessary,

1. Propeller diameter in inches 2. Propeller pitch in inches 3. Type of propeller (propeller mark)

Recommended engine oil: YAMALUBE 2 STROKE OUTBOARD OIL

ZMU04607

-x 1 2 3

Specifications and requirements

16

another outboard motor manufacturers

factory-brand TC-W3 oil.

EMU36360

Fuel requirements

EMU36780

Gasoline

Use a good quality gasoline that meets the minimum octane rating. If knocking or ping- ing occurs, use a different brand of gasoline or premium unleaded fuel. Yamaha re- comends that you use alcohol-free (see Gasohol) gasoline whenever possible.

NOTICE

ECM01980

Do not use leaded gasoline. Leaded gasoline can seriously damage the en- gine.

Avoid getting water and contaminants in the fuel tank. Contaminated fuel can cause poor performance or engine damage. Use only fresh gasoline that

has been stored in clean containers.

Gasohol

There are two types of gasohol: gasohol con- taining ethanol (E10) and that containing methanol. Ethanol can be used if the ethanol content does not exceed 10% and the fuel meets the minimum octane ratings. E85 is a fuel containing 85% ethanol and must not be used in your outboard motor. All ethanol blends containing more than 10% ethanol can cause fuel system damage or cause en- gine starting and running problems. Yamaha does not recommend gasohol containing methanol because it can cause fuel system

damage or engine performance problems. It is recommended that you install a water- separating marine fuel filter assembly (10 micron minimum) between your boats fuel tank and outboard motor when using etha- nol. Ethanol is known to allow moisture to be absorbed into boat fuel tanks and systems. Moisture in the fuel can cause corrosion of metallic fuel system components, starting and running complaints and require addition- al fuel system maintenance.

EMU27270

Ring Free Fuel Additive

Gasoline is a precise blend of many different substances, each chosen to give certain characteristics. Gasoline blends have been changing in recent years in response to con- cerns about pollution and resulting emis- sions regulations. One of the most obvious changes has been the elimination of lead from most fuels. As gasoline has changed, the amount of ad- ditives such as aromatics and oxygenates has increased. These additives are impor- tant for the engines in passenger cars, but they can have detrimental effects in marine engines, because of increased deposits in the combustion chamber. When enough de- posits collect, piston rings begin sticking. Performance drops and engine wear in- creases dramatically. While many additives available may reduce deposits, Yamaha recommends the use of

Ring Free Fuel Additive

, available from your Yamaha dealer.

Ring Free Fuel Addi- tive

has repeatedly proven its ability to clean combustion deposits from inside the engine, notably the critical piston-ring-land area, and fuel system components. Follow product la- beling for use instructions.

Recommended gasoline: Regular unleaded gasoline with a min- imum Octane rating of 86 (Pump Oc- tane Number) = (R+M)/2

Specifications and requirements

17

EMU36880

Muddy or acidic water

Yamaha strongly recommends that you have your dealer install the optional chromium- plated water pump kit if you use the outboard motor in muddy or acidic water conditions. However, depending on the model it might not be required.

EMU36330

Anti-fouling paint

A clean hull improves boat performance. The boat bottom should be kept as clean of ma- rine growth as possible. If necessary, the boat bottom can be coated with an anti-foul- ing paint approved for your area to inhibit marine growth. Do not use anti-fouling paint which includes copper or graphite. These paints can cause more rapid engine corrosion.

EMU36341

Motor disposal requirements

Never illegally discard (dump) the motor. Yamaha recommends consulting the dealer about discarding the motor.

EMU36351

Emergency equipment

Keep the following items onboard in case there is trouble with the motor.

A tool kit with assorted screwdrivers, pli- ers, wrenches (including metric sizes), and electrical tape.

Waterproof flashlight with extra batteries.

An extra engine shut-off cord (lanyard) with clip.

Spare parts, such as an extra set of spark plugs.

Consult your Yamaha dealer for details.

EMU25221

Emission control information

EMU25230

North American models

This engine conforms to U.S. Environmental Protection Agency (EPA) regulations for ma- rine SI engines. See the label affixed to your engine for details.

EMU30390

Approval label of emission control certif- icate

This label is attached to the bottom cowling. Existing Technology; N/A

1. Approval label location

ZMU06265

1

EMISSION CONTROL INFORMATION ENGINE FAMILY : THIS ENGINE CONFORMS TO 2001 U.S. EPA REGULATIONS FOR MARINE SI ENGINES. REFER TO THE OWNERS MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS. FELs : SPARK PLUG : DISPLACEMENT : ADVERTISED POWER :

IDLE SPEED : SPARK PLUG GAP (mm) : FUEL : GASOLINE VALVE LASH (mm) : IN : N/A EX : N/A

cm kW

g/kW-hr rpm IN NEUTRAL

3

ZMU05230

Specifications and requirements

18

EMU25262

Manufactured date label

This label is attached to the clamp bracket or the swivel bracket.

1. Manufactured date label location

1 ZMU03552

19

Components

EMU2579J

Components diagram TIP:

* May not be exactly as shown; also may not be included as standard equipment on all mod- els.

150

EMU26181

Remote control box

The remote control lever actuates both the shifter and the throttle. The electrical switch- es are mounted on the remote control box.

1

4

5

6 7

8

9

10

12 13

11

15 16

19

17

18

3

2 14 10

ZMU04662

1. Power trim and tilt switch 2. Flushing device 3. Tilt support lever 4. Anti-cavitation plate 5. Trim tab (anode) 6. Propeller* 7. Cooling water inlet 8. Anode 9. Clamp bracket 10. Top cowling lock lever 11. Choke knob 12. Top cowling 13. Cooling water pilot hole 14. Remote control box (side mount type)* 15. Digital tachometer*

16. Digital speedometer* 17. Tachometer* 18. Trim meter* 19. Remote oil tank*

Components

20

EMU26190

Remote control lever

Moving the lever forward from the neutral po- sition engages forward gear. Pulling the le- ver back from neutral engages reverse. The engine will continue to run at idle until the le- ver is moved about 35 (a detent can be felt). Moving the lever farther opens the throttle, and the engine will begin to accelerate.

EMU26201

Neutral interlock trigger

To shift out of neutral, first pull the neutral in- terlock trigger up.

EMU26211

Neutral throttle lever

To open the throttle without shifting into ei- ther forward or reverse, put the remote con- trol lever in the neutral position and lift the neutral throttle lever.

TIP:

The neutral throttle lever will operate only when the remote control lever is in neutral. The remote control lever will operate only when the neutral throttle lever is in the closed position.

1. Power trim and tilt switch 2. Remote control lever 3. Neutral interlock trigger 4. Neutral throttle lever 5. Main switch / choke switch 6. Engine shut-off switch 7. Throttle friction adjuster

1. Neutral

2. Forward

3. Reverse 4. Shift 5. Fully closed

6. Throttle 7. Fully open

1. Neutral interlock trigger

Components

21

EMU26221

Choke switch

To activate the choke system, press in the main switch while the key is turned to the (on) or (start) position. The choke system will then supply the rich fuel mixture required to start the engine. When the key is released, the choke will switch off automatically.

EMU25973

Throttle friction adjuster

A friction device provides adjustable resis- tance to movement of the throttle grip or the remote control lever, and can be set accord- ing to operator preference. To increase resistance, turn the adjuster clockwise.

WARNING! Do not overtighten the friction adjuster. If there is too much

resistance, it could be difficult to move the remote control lever or throttle grip, which could result in an accident.

[EWM00032]

To decrease resistance, turn the adjuster counterclockwise.

When constant speed is desired, tighten the adjuster to maintain the desired throttle set- ting.

EMU25993

Engine shut-off cord (lanyard) and clip

The clip must be attached to the engine shut- off switch for the engine to run. The cord should be attached to a secure place on the operators clothing, or arm or leg. Should the operator fall overboard or leave the helm, the cord will pull out the clip, stopping ignition to the engine. This will prevent the boat from running away under power.

WARNING! At- tach the engine shut-off cord to a secure place on your clothing, or your arm or leg while operating. Do not attach the cord to clothing that could tear loose. Do not route the cord where it could become en- tangled, preventing it from functioning. Avoid accidentally pulling the cord dur- ing normal operation. Loss of engine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be

1. Fully open 2. Fully closed

ZMU03160

Components

22

thrown forward.

[EWM00122]

EMU26011

Choke knob for pull type

To supply the engine with the rich fuel mix- ture required to start, pull out this knob.

EMU26090

Main switch

The main switch controls the ignition system; its operation is described below.

(off)

With the main switch in the (off) posi- tion, the electrical circuits are off, and the key can be removed.

(on)

With the main switch in the (on) posi- tion, the electrical circuits are on, and the key cannot be removed.

(start)

With the main switch in the (start) po- sition, the starter motor turns to start the en- gine. When the key is released, it returns automatically to the (on) position.

EMU32052

Power trim and tilt switch on remote control

The power trim and tilt system adjusts the outboard motor angle in relation to the tran- som. Pressing the switch (up) trims the outboard motor up, and then tilts it up. Press- ing the switch (down) tilts the outboard motor down and trims it down. When the switch is released, the outboard motor will stop in its current position. For instructions on using the power trim and tilt switch, see pages 47 and 49.

1. Cord 2. Clip 3. Engine shut-off switch

ZMU03903

Components

23

EMU26153

Power trim and tilt switch on bottom engine cowling

The power trim and tilt switch is located on the side of the bottom engine cowling. Press- ing the switch (up) trims the outboard motor up, and then tilts it up. Pressing the switch (down) tilts the outboard motor down and trims it down. When the switch is released, the outboard motor will stop in its current position. For instructions on using the power trim and tilt switch, see page 49.

WARNING

EWM01030

Use the power trim and tilt switch located on the bottom engine cowling only when the boat is at a complete stop with the en- gine off. Attempting to use this switch while the boat is moving could increase the risk of falling overboard and could distract the operator, increasing the risk of collision with another boat or an obsta-

cle.

EMU26244

Trim tab with anode

WARNING

EWM00840

An improperly adjusted trim tab could cause difficult steering. Always test run after the trim tab has been installed or re-

placed to be sure steering is correct. Be sure you have tightened the bolt after ad-

justing the trim tab.

The trim tab should be adjusted so that the steering control can be turned to either the right or left by applying the same amount of force. If the boat tends to veer to the left (port side), turn the trim tab rear end to the port side A in the figure. If the boat tends to veer to the right (starboard side), turn the trim tab end to the starboard side B in the figure.

NOTICE

ECM00840

The trim tab also serves as an anode to protect the engine from electrochemical corrosion. Never paint the trim tab as it

will become ineffective as an anode.

UP

DN

ZMU03517

1. Trim tab 2. Bolt 3. Cap

1

2

3

ZMU02525

A

B

Components

24

EMU26341

Tilt support lever for power trim and tilt model

To keep the outboard motor in the tilted up position, lock the tilt support lever to the clamp bracket.

NOTICE

ECM00660

Do not use the tilt support lever or knob when trailering the boat. The outboard motor could shake loose from the tilt sup- port and fall. If the motor cannot be trail- ered in the normal running position, use an additional support device to secure it

in the tilt position.

EMU26382

Top cowling lock lever (pull up type)

To remove the engine top cowling, pull up the lock lever(s) and lift off the cowling. When installing the cowling, check to be sure it fits properly in the rubber seal. Then lock the cowling by moving the lever(s) down- ward.

EMU26460

Flushing device

This device is used to clean the cooling wa- ter passages of the motor using a garden hose and tap water.

TIP:

For details on usage, see page 55.

Bolt tightening torque: 39.2 Nm (4.0 kgf-m, 28.9 ft-lb)

1. Tilt support lever

A B

ZMU01863

ZMU03979

1

1. Top cowling lock lever(s)

1. Top cowling lock lever(s)

ZMU03904

1

ZMU03905

1

Components

25

1. Flushing device

1

ZMU04011

26

Instruments and indicators

EMU26493

Digital tachometer

The tachometer shows the engine speed and has the following functions. All segments of the display will light momen- tarily after the main switch is turned on and will return to normal thereafter.

TIP:

The water separator and engine trouble-alert indicators only operate when the engine is equipped with the appropriate functions.

EMU36050

Tachometer

The tachometer displays engine speed in hundreds of revolutions per minute (r/min). For example, if the tachometer display reads 22 then the engine speed is 2200 r/min.

EMU26621

Trim meter

This meter shows the trim angle of your out- board motor.

Memorize the trim angles that work best for your boat under different conditions. Adjust the trim angle to the desired using

the power trim and tilt switch.

If the trim angle of your motor exceeds the trim operating range, the top segment on the trim meter display will blink.

EMU26651

Hour meter

This meter shows the number of hours the engine has been run. It can be set to show the total number of hours or the number of hours for the current trip. The display can also be turned on and off.

To change the display format, press the (mode) button. The display can show total hours or trip hours, or turn off. To reset the trip hours, simultaneously press the (set) and (mode) buttons for more than 1 second while the trip hours are displayed. This resets the trip counter to 0 (zero). The total number of hours the engine has been run cannot be reset.

1. Tachometer 2. Trim meter 3. Hour meter 4. Oil level indicator 5. Overheat-alert indicator 6. Set button 7. Mode button

1

3

5 6 7

4

2

ZMU01891

ZMU01869

ZMU01870

Instruments and indicators

27

EMU26551

Oil level indicator (digital type)

This indicator shows the engine oil level. If the oil level falls below the lower limit, the alert indicator will start to blink. For further in- formation, see page 31.

NOTICE

ECM00030

Do not operate the engine without oil. Se-

rious engine damage will occur.

EMU26583

Overheat-alert indicator

If the engine temperature rises too high, the alert indicator will start to blink. For further in- formation on reading the indicator, see page 31.

NOTICE

ECM00052

Do not continue to run the engine if the overheat-alert indicator is on. Serious en-

gine damage will occur.

EMU26602

Digital speedometer

This gauge shows the boat speed and other information.

All segments of the display will light momen- tarily after the main switch is turned on and will return to normal thereafter.

EMU36061

Speedometer

The speedometer displays km/h, mph, or knots, according to operator preference. Se- lect the desired units of measurement by set- ting the selector switch on the back of the gauge. See the illustration for settings.

1. Oil level indicator

1 ZMU01867

1. Overheat-alert indicator

1. Speedometer 2. Fuel gauge 3. Trip meter/clock/voltmeter 4. Alert indicator(s)

1

ZMU01868

Instruments and indicators

28

EMU26712

Fuel gauge

Eight segments indicate the fuel level. When all segments are showing, the fuel tank is full.

The fuel level reading can be inaccurate due to by the position of the sensor in the fuel tank and the attitude of the boat in the water. Operation with bow-up trim or continuous turning can give false readings. Do not adjust the selector switch for fuel sen- sor. Incorrectly setting the selector switch on the gauge will give false readings. Consult your Yamaha dealer on how to correctly set the selector switch.

NOTICE:

Running out of fuel can damage the engine.

[ECM01770]

EMU36071

Trip meter / Clock / Voltmeter

The display shows either the trip meter, the clock, or the voltmeter. To change the display, press the (mode) button repeatedly until the indicator on the face of the gauge points to (trip meter), (clock), or (voltmeter).

EMU26691

Trip meter

This gauge displays the distance the boat has traveled since the gauge was last reset. The trip distance is shown in kilometers or miles depending upon the unit of measure- ment selected for the speedometer. To reset the trip meter to zero, press the (set) and (mode) buttons at the same time. The trip distance is kept in memory by bat- tery power. The stored data will be lost if the battery is disconnected.

EMU26701

Clock

To set the clock: 1. Be sure the gauge is in the (time)

mode. 2. Press the (set) button; the hour dis-

play will begin blinking. 3. Press the (mode) button until the

desired hour is displayed. 4. Press the (set) button again, the

minute display will begin blinking.

1. Cap 2. Selector switch (for speed unit) 3. Selector switch (for fuel sensor)

ZMU01745

Instruments and indicators

29

5. Press the (mode) button until the desired minute is displayed.

6. Press the (set) button again to start the clock.

The clock operates on battery power. Dis- connecting the battery will stop the clock. Reset the clock after connecting the battery.

EMU36080

Voltmeter

The voltmeter displays the charge of the bat- tery in volts(V).

EMU26721

Fuel level-alert indicator

If the fuel level decreases to one segment, the fuel level alert segment will blink. Do not continue to operate the engine with full throttle if an alert device has activated. Get back to the port within trolling engine speed.

NOTICE:

Running out of fuel can damage the engine.

[ECM01770]

EMU26732

Low battery voltage-alert indicator

If battery voltage drops, the display will auto- matically turn on and blink. Get back to the port soon if an alert device has activated. For charging the battery, con- sult your Yamaha dealer.

EMU26471

Analog tachometer

This gauge shows the engine speed and has the following functions.

EMU26541

Oil level indicators (three indicators)

The indicators on the gauge show the status of the oil level. For details on how to read the

1. Fuel level-alert segment

1. Low battery indicator

1. Tachometer 2. Oil level indicator

ZMU04577

1

2

Instruments and indicators

30

indicators, see page 42.

NOTICE

ECM00030

Do not operate the engine without oil. Se-

rious engine damage will occur.

EMU26611

Analog trim meter

This gauge shows the trim angle of your out- board motor.

Memorize the trim angles that work best for your boat under different conditions. Adjust the trim angle to the desired setting with the power trim and tilt switch.

1. Oil level indicators

ZMU04580

1

ZMU04581

31

Engine control system

EMU26803

Alert system

NOTICE

ECM00091

Do not continue to operate the engine if a alert device has activated. Consult your Yamaha dealer if the problem cannot be

located and corrected.

EMU2681A

Overheat alert

This engine has an overheat-alert device. If the engine temperature rises too high, the alert device will activate.

The engine speed will automatically de- crease to about 2000 r/min.

The overheat-alert indicator will light or blink.

The buzzer will sound (if equipped on the tiller handle, remote control box, or main switch panel).

If the alert system has activated, stop the en- gine and check the cooling water inlets:

Check trim angle to be sure that the cool- ing water inlet is submerged.

Check the cooling water inlet for clogging.

EMU26848

Oil level alert and oil filter clogging alert

Oil injection models

This engine has an oil level alert system. If the oil level falls below the lower limit, the alert system will activate.

Activation of alert device

Engine speed will automatically decrease to about 2000 r/min.

The oil level-alert indicator will light or blink.

ZMU01757

ZMU04766

ZMU02630

Engine control system

32

The buzzer will sound (if equipped on the tiller handle, remote control box, or main switch panel).

If the alert system has been activated, stop the engine and check for the cause.

TIP:

The alert for oil filter clogging is similar to the alerts for low oil level and overheating. To make troubleshooting easier, check for en- gine overheating first, then oil level, and fi-

nally oil filter clogging.

ZMU03942

ZMU04586

ZMU03025

1. Oil lter

1. Oil lter

1

ZMU03906

1 ZMU01952

33

Installation

EMU26902

Installation

The information presented in this section is intended as reference only. It is not possible to provide complete instructions for every possible boat and motor combination. Prop- er mounting depends in part on experience and the specific boat and motor combination.

WARNING

EWM01590

Overpowering a boat could cause se- vere instability. Do not install an out- board motor with more horsepower than the maximum rating on the capac- ity plate of the boat. If the boat does not have a capacity plate, consult the boat manufacturer.

Improper mounting of the outboard mo- tor could result in hazardous condi- tions such as poor handling, loss of control, or fire hazards. For permanent- ly mounted models, your dealer or oth- er person experienced in proper

rigging should mount the motor.

EMU33470

Mounting the outboard motor

The outboard motor should be mounted so that the boat is well balanced. Otherwise, the boat could be hard to steer. For single-en- gine boats, mount the outboard motor on the centerline (keel line) of the boat.

EMU26931

Mounting height (boat bottom)

The mounting height of your outboard motor affects its efficiency and reliability. If it is mounted too high, propeller ventilation may occur, which will reduce propulsion due to excessive propeller slip, and the water in- takes for the cooling system may not get ad- equate water supply, which can cause engine overheating. If the engine is mounted too low, water resistance (drag) will in- crease, thereby reducing engine efficiency and performance. Most commonly, outboard motor should be mounted so that the anti-cavitation plate is in alignment with the bottom of the boat. The optimum mounting height of the outboard motor is affected by the boat/motor combina- tion and the desired use. Test runs at differ- ent heights can help determine the optimum mounting height. Consult your Yamaha deal- er or boat manufacturer for further informa- tion on determining the proper mounting height.

1. Center line (keel line)

1 ZMU01873

Installation

34

NOTICE

ECM01630

During water testing, check the buoy- ancy of the boat, at rest, with its maxi- mum load. Check that the static water level on the exhaust housing is low enough to prevent water entry into the power head when water rises due to waves when the outboard is not run- ning.

Incorrect engine height or obstructions to the smooth flow of water (such as the design or condition of the boat, or ac- cessories such as transom ladders or depth finder transducers) can create airborne water spray while the boat is cruising. If the motor is operated con- tinuously in the presence of airborne water spray, enough water could enter the engine through the intake opening on the cowling to cause severe engine damage. Eliminate the cause of the air-

borne water spray.

ZMU01762

35

Operation

EMU36380

First-time operation

EMU27020

Breaking in engine

Your new engine requires a period of break- in to allow mating surfaces of moving parts to wear in evenly. Correct break-in will help en- sure proper performance and longer engine life.

NOTICE

ECM00140

Failure to follow the break-in procedure could result in reduced engine life or even severe engine damage.

Premix fuel must be used during break- in in addition to oil in the oil injection

system.

EMU27060

Gasoline and engine oil mixing chart (50:1)

NOTICE

ECM00150

Be sure to mix gasoline and oil complete- ly, otherwise the engine may be dam-

aged.

EMU30311

Procedure for oil injection models

Run the engine under load (in gear with a propeller installed) for 10 hours as follows. 1. First 10 minutes:

Run the engine at the lowest possible speed. A fast idle in neutral is best.

2. Next 50 minutes: Do not exceed half throttle (approxi- mately 3000 r/min). Vary engine speed occasionally. If you have an easy-plan- ing boat, accelerate at full throttle onto plane, then immediately reduce the throttle to 3000 r/min or less.

3. Next two hours: Accelerate at full throttle onto plane, then reduce engine speed to three-quar- ter throttle (approximately 4000 r/min). Vary engine speed occasionally. Run at full throttle for one minute, then allow about 10 minutes of operation at three- quarter throttle or less to let the engine cool.

4. Remaining seven hours: Run the engine at any speed. However, avoid operating at full throttle for more than 5 minutes at a time.

5. After the first 10 hours: Operate the engine normally. Use only straight gasoline in the fuel tank. The Yamaha oil injection system provides proper lubrication for normal operation.

EMU36400

Getting to know your boat

Different boats handle differently. Operate cautiously while you learn how your boat handles under different conditions and with different trim angles (see page 47).

EMU36412

Checks before starting engine

WARNING

EWM01920

If any item in the checks before starting engine is not working properly, have it in- spected and repaired before operating the outboard motor. Otherwise an acci-

1. : Gasoline

2. : Engine oil

Operation

36

dent could occur.

NOTICE

ECM00120

Do not start the engine out of water. Over- heating and serious engine damage can

occur.

EMU37150

Fuel level

Be sure you have plenty of fuel for your trip. A good rule is to use 1/3 of your fuel to get to the destination, 1/3 to return, and to keep 1/ 3 as an emergency reserve. With the boat level on a trailer or in the water, turn the key to (on) and check the fuel level. For fuel filling instructions, see page 40.

EMU36431

Remove cowling

For the following checks, remove the top cowling from the engine. To remove the en- gine cowling, release all the lock levers and lift off the cowling.

EMU36442

Fuel system

WARNING

EWM00060

Gasoline and its vapors are highly flam- mable and explosive. Keep away from sparks, cigarettes, flames, or other

sources of ignition.

WARNING

EWM00910

Leaking fuel can result in fire or explo- sion.

Check for fuel leakage regularly.

If any fuel leakage is found, the fuel system must be repaired by a qualified mechanic. Improper repairs can make

the outboard unsafe to operate.

EMU36450

Check for fuel leaks

Check under top cowling and in the boat for fuel leaks or gasoline fumes.

Check fuel line connections to be sure they are tight.

Check fuel lines for cracks, swelling, or other damage.

EMU37320

Check the fuel filter

Check that the fuel filter is clean and free of water. If any water is found in the fuel, or if a significant amount of debris is found, the fuel tank should be checked and cleaned by a Yamaha dealer.

ZMU06106

ZMU06102 ZMU06217

Operation

37

EMU36460

Controls

Turn the steering wheel full-right and full- left. Make sure operation is smooth and unrestricted throughout the whole range with no binding or excessive free play.

Operate the throttle levers several times to make sure there is no hesitation in their travel. Operation should be smooth over the complete range of motion, and each le- ver should return completely to the idle po- sition.

Look for loose or damaged connections of the throttle and shift cables under the en- gine cowling.

EMU36481

Engine shut-off cord (lanyard)

Inspect the engine shut-off cord for damage, such as cuts, breaks, and wear.

EMU27120

Oil

Check to be sure you have plenty of oil for your trip.

EMU27151

Engine

Check the engine and engine mounting.

Look for loose or damaged fasteners.

Check the propeller for damage.

Check for oil leaks.

EMU27171

Operation after a long period of storage

When operating the engine after a long peri- od (12 months) of storage, proceed as fol- lows: 1. Use a 50:1 gasoline-oil mixture to start

the engine. 2. Start the engine. Leave it idling.

WARNING! Do not touch or remove electrical parts when starting or dur- ing operation. Keep hands, hair, and clothes away from the flywheel and other rotating parts while the engine is running.

[EWM00091]

3. Watch for oil flowing through the oil feed

pipes. After any air in the oil lines has been expelled, the oil injection system should supply oil normally. If no oil is flowing after 10 minutes of idling, consult your Yamaha dealer.

NOTICE

ECM00130

Be sure to take the above steps when op- erating the engine after a long period of storage. Otherwise engine seizure could

occur.

EMU36490

Flushing device

Check that flushing devices garden hose

1. Cord 2. Clip 3. Engine shut-off switch ZMU03907

Operation

38

connector is securely screwed on to the fit- ting on the bottom cowling.

NOTICE:

If the flushing device is not properly connect- ed, cooling water can leak out and the en- gine can overheat during operation.

[ECM01800]

EMU36961

Install cowling

1. Be sure that all cowling lock levers are released.

2. Be sure that the rubber seal is seated all the way around the engine.

3. Place the cowling on top of the seal. 4. Check to be sure the rubber seal fits cor-

rectly all the way around the engine. 5. Move the levers to lock the cowling as

shown.

NOTICE:

If the cowling is not installed correctly, water spray under the cowling can damage the engine, or the cowling can blow off at high speeds.

[ECM01990]

After installing, check the fitting of the top cowling by pushing it with both hands. If the top cowling is loose, have it repaired by your Yamaha dealer.

EMU29158

Checking power trim and tilt system

WARNING

EWM01930

Never get under the lower unit while it is tilted, even when the tilt support lever

1. Fitting 2. Flushing device

1

2

ZMU06050

ZMU06131

ZMU06127

ZMU04679

Operation

39

is locked. Severe injury could occur if the outboard motor accidentally falls.

Body parts can be crushed between the motor and the clamp bracket when the motor is trimmed or tilted.

Be sure no one is near the outboard

motor before performing this check.

1. Check the power trim and tilt unit for any sign of oil leaks.

2. Operate each of the power trim and tilt switches on the remote control and en- gine bottom cowling to check that all switches work.

3. Tilt the outboard motor up and check that the tilt rod and trim rods are extend- ed completely.

4. Use the tilt support lever to lock the mo- tor in the up position. Operate the tilt down switch briefly so the motor is sup- ported by the tilt support lever.

5. Check that the tilt rod and trim rods are free of corrosion or other flaws.

6. Activate the tilt-down switch until the trim rods have retracted completely into the cylinders.

7. Activate the trim-up switch until the tilt rod is fully extended. Unlock the tilt sup- port lever.

8. Tilt the outboard motor down. Check

1. Tilt rod 2. Trim rods

ZMU03458

1

2

1. Tilt support lever

ZMU03459

1

ZMU04156

ZMU03460

Operation

40

that the tilt rod and trim rods operate smoothly.

EMU36581

Battery

Check that the battery is in good condition, and fully charged. Check that the battery connections are clean, secure and covered by insulating covers. The electrical contacts of the battery and cables must be clean and properly connected or the battery will not start the engine. Refer to the battery manufacturers instruc- tions for checks for your particular battery.

EMU27234

Filling fuel and engine oil

EMU30321

Filling fuel for models without a fuel joint

WARNING

EWM01830

Gasoline and its vapors are highly flam- mable and explosive. Always refuel ac- cording to this procedure to reduce the risk of fire and explosion.

Gasoline is poisonous and can cause injury or death. Handle gasoline with care. Never siphon gasoline by mouth. If you should swallow some gasoline or inhale a lot of gasoline vapor, or get some gasoline in your eyes, see your doctor immediately. If gasoline spills on your skin, wash with soap and wa- ter. If gasoline spills on your clothing,

change your clothes.

1. Stop the engine. 2. Be sure you are in a well-ventilated out-

door area, either securely moored or trailered.

3. Make sure no one is in the boat. 4. Do not smoke and keep away from

sparks, flames, static electric discharge,

or other sources of ignition. 5. If you use a portable container to store

and dispense fuel, only use a locally ap- proved GASOLINE container.

6. Touch the fuel nozzle to the filler open- ing or funnel to help prevent electrostatic sparks.

7. Fill the fuel tank, but do not overfill. Fuel can expand and overflow if the tempera- ture increases.

8. Tighten the filler cap securely. 9. Wipe up any spilled gasoline immediate-

ly with dry rags. Dispose rags properly. According to local laws or regulations.

EMU27292

Filling oil for oil injection models

WARNING

EWM00530

Do not add gasoline into the oil tank. Fire

or explosion could result.

This engine uses the Yamaha oil injection system, which provides superior lubrication by ensuring the proper oil ratio for all operat- ing conditions. No fuel premixing is needed. Simply pour gasoline into the fuel tank and oil into the oil tank. Convenient indicators show the status of the oil supply. For details on how to read the indicators, see page 42. To fill the engine oil tank, proceed as follows: 1. Pour engine oil into the remote oil tank.

Remote oil tank capacity: 10.5 L (11.10 US qt, 9.24 Imp.qt)

Operation

41

TIP:

The oil level lines on the remote oil tank indi- cate the amount of additional oil that can be added to the tank. The top oil level line indi- cates approximately 1.9 L (0.5 US gal, 0.4 Imp gal) can be added, and the bottom oil level line indicates approximately 3.8 L (1 US gal, 0.8 Imp gal) can be added. 2. Turn on the main switch. The Yamaha

oil injection system will automatically feed oil from the remote oil tank to the engine oil tank.

3. Operate the engine normally.

NOTICE

ECM00570

When the engine is operated for the first time or stored for a period of time, a min- imum of 5 liters (5.3 US qt, 4.4 Imp qt) of oil should be kept in the remote oil tank. Otherwise the oil-feed pump chamber will not be filled with oil, and no oil will be

supplied.

ZMU01877

Operation

42

EMU27321

Oil level indicator operation

The various functions of the oil level system are as follows:

EMU27383

Oil level indicator

Electric start models

Oil level-alert indicator (digital

tachometer)

Oil level-alert indicator (analog

tachometer)

Engine oil tank

Remote oil tank

Remarks

Green

more than

300 cm

3

(0.32 US qt, 0.26 Imp qt)

more than

1500 cm

3

(1.6 US qt,

1.31 Imp qt)

No relling necessary.

Yellow

more than

300 cm

3

(0.32 US qt, 0.26 Imp qt)

1500 cm

3

(1.6 US qt, 1.31 Imp qt) or less

Add oil; see page 40.

RedYellow Green

300 cm

3

(0.32 US qt,

0.26 Imp qt) or less

more than

1500 cm

3

(1.6 US qt, 1.31 Imp qt)

Check oil lter for clog- ging.

Check battery cable connection. Buzzer will sound.

Engine speed is auto- matically reduced to about 2000 r/min.

Red

300 cm

3

(0.32 US qt,

0.26 Imp qt) or less

1500 cm

3

(1.6 US qt, 1.31 Imp qt) or less

Oil has not been added.

Buzzer will sound.

Engine speed is auto- matically reduced to about 2000 r/min.

Buzzer sounds in remote control box and engine speed is limited to about 2000 r/min to help conserve oil.

Operation

43

EMU27451

Operating engine

EMU27482

Feeding fuel

WARNING

EWM00420

Before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstructions. Be sure there are no swimmers in the water near you.

When the air vent screw is loosened, gasoline vapor will be released. Gaso- line is highly flammable, and its vapors are flammable and explosive. Refrain from smoking, and keep away from open flames and sparks while loosen- ing the air vent screw.

This product emits exhaust gases which contain carbon monoxide, a col- orless, odorless gas which could cause brain damage or death when inhaled. Symptoms include nausea, dizziness, and drowsiness. Keep cockpit and cab- in areas well ventilated. Avoid blocking

exhaust outlets.

1. If there is an air vent screw on the fuel tank cap, loosen it 2 or 3 turns.

2. If there is a fuel joint or a fuel cock on the boat, firmly connect the fuel line to the joint or open the fuel cock.

3. Squeeze the primer pump, with the ar- row pointing up, until you feel it become firm.

EMU27492

Starting engine

WARNING

EWM01600

Before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstructions. Be sure there are no swimmers in the wa-

ter near you.

EMU27645

Electric start / remote control models

WARNING

EWM01840

Failure to attached engine shut-off cord could result in a runaway boat if opera- tor is ejected. Attach the engine shut- off cord to a secure place on your cloth- ing, or your arm or leg while operating. Do not attach the cord to clothing that could tear loose. Do not route the cord where it could become entangled, pre- venting it from functioning.

Avoid accidentally pulling the cord dur- ing normal operation. Loss of engine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to

be thrown forward.

1. Arrow

Operation

44

1. Place the remote control lever in neutral.

TIP:

The start-in-gear protection device prevents the engine from starting except when in neu- tral. 2. Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm or leg. Then install the clip on the other end of the cord into the engine shut-off switch.

3. Turn the main switch to (on).

4. Open the throttle slightly without shifting using the neutral throttle lever or free ac- celerator. You may need to change the throttle opening slightly depending on engine temperature. After the engine starts, return the throttle to the original position.

TIP:

On remote controls equipped with a neu- tral throttle lever, a good starting point is to lift the lever just until you feel resistance, then lift slightly more.

The neutral throttle lever or free accelera- tor can only be used when the remote con- trol lever is in neutral.

5. Press in and hold the main switch to op- erate the remote choke system. The re- mote choke switch automatically returns to its normal position when you release your hand. Therefore keep the switch pressed in.

TIP:

It is not necessary to use the choke when starting a warm engine.

Push in the main switch fully, or the remote choke system will not operate.

6. Turn the main switch to (start), and hold it for a maximum of 5 seconds.

OFF

ON

ZMU01880

N

ZMU02314

Operation

45

7. Immediately after the engine starts, re- lease the main switch and allow it to re- turn to (on).

NOTICE:

Never turn the main switch to (start) while the engine is running. Do not keep the starter motor turning for more than 5 seconds. If the starter motor is turned continuously for more than 5 seconds, the battery will be quickly discharged, thus making it impossible to start the engine. The starter can also be damaged. If the engine will not start after 5 seconds of cranking, return the main switch to (on), wait 10 seconds, then crank the engine again.

[ECM00192]

EMU36510

Checks after starting engine

EMU36520

Cooling water

Check for a steady flow of water from the cooling water pilot hole. A continuous flow of water from the pilot hole shows that the wa- ter pump is pumping water through the cool- ing passages. If the cooling passages are frozen, it may take a while for water to start flowing out of the pilot hole.

NOTICE

ECM01810

If water is not flowing out of the pilot hole at all times while the engine is running,

overheating and serious damage could occur. Stop the engine and check wheth- er the cooling water inlet on the lower case or the cooling water pilot hole is blocked. Consult your Yamaha dealer if the problem cannot be located and cor-

rected.

Check that no water leaks from the joints be- tween the exhaust cover, cylinder head, and body cylinder.

EMU27670

Warming up engine

EMU27683

Choke start models

After starting the engine, allow it to idle for 3 minutes to warm up. Failure to do so will shorten engine life. Gradually return the choke knob to its home position as the en- gine warms up.

EMU36530

Checks after engine warm-up

EMU36540

Shifting

While tightly moored, and without applying throttle, confirm that the engine shifts smoothly into forward and reverse, and back to neutral.

EMU31721

Stop switches

Confirm that turning the main switch to the (off) position stops the engine.

ZMU03262

ON STARTOFF

ZMU03908

Operation

46

Confirm that removing the clip from the en- gine shut-off switch stops the engine.

Confirm that the engine cannot be started with the clip removed from the engine shut-off switch.

EMU31730

Shifting

WARNING

EWM00180

Before shifting, make sure there are no swimmers or obstacles in the water near

you.

NOTICE

ECM01610

Warm up the engine before shifting into gear. Until the engine is warm, the idle speed may be higher than normal. High idle speed can prevent you from shifting back to neutral. If this occurs, stop the engine, shift to neutral, then restart the

engine and allow it to warm up.

To shift out of neutral 1. Pull the neutral interlock trigger up (if

equipped).

2. Move the remote control lever firmly and crisply forward (for forward gear) or backward (for reverse gear) about 35 (a detent can felt).

To shift from in gear (forward/reverse) to neutral 1. Close the throttle so that the engine

slows to idle speed.

2. After the engine is at idle speed in gear move the remote control lever firmly and crisply into the neutral position.

1. Neutral interlock trigger

Operation

47

EMU31742

Stopping boat

WARNING

EWM01510

Do not use the reverse function to slow down or stop the boat as it could cause you to lose control, be ejected, or im- pact the steering wheel or other parts of the boat. This could increase the risk of serious injury. It could also damage the shift mechanism.

Do not shift into reverse while traveling at planing speeds. Loss of control, boat swamping, or damage to the boat could

occur.

The boat is not equipped with a separate braking system. Water resistance stops it af- ter the throttle lever is moved back to idle. The stopping distance varies depending on gross weight, water surface conditions, and wind direction.

EMU27821

Stopping engine

Before stopping the engine, first let it cool off for a few minutes at idle or low speed. Stop- ping the engine immediately after operating at high speed is not recommended.

EMU27853

Procedure

1. Turn the main switch to (off).

2. After stopping the engine, disconnect the fuel line or close the fuel cock if there is a fuel joint or a fuel cock on the boat.

3. Tighten the air vent screw on the fuel tank cap (if equipped).

4. Remove the key if the boat will be left unattended.

TIP:

The engine can also be stopped by pulling the cord and removing the clip from the en- gine shut-off switch, then turning the main switch to (off).

EMU27862

Trimming outboard motor

WARNING

EWM00740

Excessive trim for the operating condi- tions (either trim up or trim down) can cause boat instability and can make steering the boat more difficult. This in- creases the possibility of an accident. If the boat begins to feel unstable or is hard to steer, slow down and/or readjust the

trim angle.

The trim angle of the outboard motor helps determine the position of the bow of the boat in the water. Correct trim angle will help im- prove performance and fuel economy while reducing strain on the engine. Correct trim angle depends upon the combination of boat, engine, and propeller. Correct trim is also affected by variables such as the load in the boat, sea conditions, and running speed.

Operation

48

EMU27885

Adjusting trim angle (Power trim and tilt)

WARNING

EWM00753

Be sure all people are clear of the out- board motor when adjusting the trim angle. Body parts can be crushed be- tween the motor and the clamp bracket when the motor is trimmed or tilted.

Use caution when trying a trim position for the first time. Increase speed gradu- ally and watch for any signs of instabil- ity or control problems. Improper trim angle can cause loss of control.

If equipped with a power trim and tilt switch located on the bottom cowling, use the switch only when the boat is at a complete stop with the engine off. Do not adjust the trim angle with this

switch while the boat is moving.

Adjust the outboard motor trim angle using the power trim and tilt switch.

To raise the bow (trim-out), press the switch (up). To lower the bow (trim-in), press the switch (down). Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions.

EMU27911

Adjusting boat trim

When the boat is on plane, a bow-up attitude results in less drag, greater stability and effi- ciency. This is generally when the keel line of the boat is up about 3 to 5 degrees. With the bow up, the boat may have a greater tenden-

1. Trim operating angle

ZMU03441

1

1. Power trim and tilt switch

1. Power trim and tilt switch

UP

DN ZMU03522

1

Operation

49

cy to steer to one side or the other. Compen- sate for this as you steer. The trim tab can also be adjusted to help offset this effect. When the bow of the boat is down, it is easier to accelerate from a standing start onto plane.

Bow Up

Too much trim-out puts the bow of the boat too high in the water. Performance and econ- omy are decreased because the hull of the boat is pushing the water and there is more air drag. Excessive trim-out can also cause the propeller to ventilate, which reduces per- formance further, and the boat may por- poise (hop in the water), which could throw the operator and passengers overboard.

Bow Down

Too much trim-in causes the boat to plow through the water, decreasing fuel economy and making it hard to increase speed. Oper- ating with excessive trim-in at higher speeds

also makes the boat unstable. Resistance at the bow is greatly increased, heightening the danger of bow steering and making opera- tion difficult and dangerous.

TIP:

Depending on the type of boat, the outboard motor trim angle may have little effect on the trim of the boat when operating.

EMU27934

Tilting up and down

If the engine will be stopped for some time or if the boat is moored in shallows, the out- board motor should be tilted up to protect the propeller and lower casing from damage by collision with obstructions, and also to re- duce salt corrosion.

WARNING

EWM00221

Be sure all people are clear of the out- board motor when tilting up and down, Body parts can be crushed between the motor and the clamp bracket when the

motor is trimmed or tilted.

WARNING

EWM00250

Leaking fuel is a fire hazard. If there is a fuel joint on the outboard motor, discon- nect the fuel line or close the fuel cock if the engine will be tilted for more than a

Operation

50

few minutes. Otherwise fuel may leak.

NOTICE

ECM00241

Before tilting the outboard motor, stop the engine by following the procedure on page 47. Never tilt the outboard mo- tor while the engine is running. Severe damage from overheating can result.

Do not tilt up the engine by pushing the tiller handle (if equipped) because this

could break the handle.

EMU32723

Procedure for tilting up (power trim and tilt models)

1. Place the remote control lever in neutral.

2. Press the power trim and tilt switch (up) until the outboard motor has tilted up completely.

3. Pull the tilt support lever toward you to support the engine.

WARNING! After tilting the outboard motor, be sure to support it with the tilt support knob or tilt support lever. Otherwise the out- board motor could fall back down suddenly if oil in the power trim and tilt unit or in the power tilt unit loses pressure.

[EWM00262]

NOTICE:

Do not use the tilt support lever or knob when trailering the boat. The outboard mo- tor could shake loose from the tilt support and fall. If the motor cannot be trailered in the normal running po- sition, use an additional support de- vice to secure it in the tilt position. For more detailed information, see page 53.

[ECM01641]

4. Models equipped with trim rods: Once the outboard motor is supported with the tilt support lever, press the power trim

UP

ZMU03523

ZMU03432

Operation

51

and tilt switch (down) to retract the trim rods.

NOTICE:

Be sure to retract the trim rods completely during mooring. This protects the rods from marine growth and corrosion which could damage the power trim and tilt mechanism.

[ECM00251]

EMU33120

Procedure for tilting down (power trim and tilt models)

1. Push the power trim and tilt switch (up) until the outboard motor is support- ed by the tilt rod and the tilt support lever becomes free.

2. Release the tilt support lever.

3. Push the power trim and tilt switch (down) to lower the outboard motor to the desired position.

EMU28061

Shallow water

EMU32851

Power trim and tilt models

The outboard motor can be tilted up partially to allow operation in shallow water.

NOTICE

ECM00260

Do not tilt the outboard motor up so that the cooling water inlet on the lower unit is above the surface of the water when set- ting up for and cruising in shallow water. Otherwise severe damage from overheat-

ing can result.

EMU32922

Procedure for power trim and tilt models

1. Place the remote control lever in neutral.

ZMU03997

ZMU03453

DN

ZMU01936

UP

DN

DN

ZMU03524

Operation

52

2. Slightly tilt the outboard motor up to the desired position using the power trim and tilt switch.

WARNING! Using the power trim and tilt switch on the bot- tom cowling while the boat is moving or engine is on could increase the risk of falling overboard and could distract the operator, increasing the risk of collision with another boat or an obstacle.

[EWM01850]

3. To return the outboard motor to the nor- mal running position, press the power trim and tilt switch and slowly tilt the out- board motor down.

EMU28194

Cruising in other conditions

Cruising in salt water

After operating in salt water, flush the cooling water passages with fresh water to prevent them from becoming clogged. Also rinse the outside of the outboard motor with fresh wa- ter and, if possible, rinse the power head un- der the cowling.

Cruising in muddy, turbid, or acidic water

Yamaha strongly recommends that you use the optional chromium-plated water pump kit (see page 17) if you use the outboard motor in acidic water or water with a lot of sediment in it, such as muddy or turbid (cloudy) water. After operating in such water, flush the cool- ing passages with fresh water to prevent cor- rosion. Also rinse the outside of the outboard motor with fresh water.

UP

ZMU01935

UP

DN

UP

ZMU03527

53

Maintenance

EMU31841

Transporting and storing outboard motor

WARNING

EWM01860

Leaking fuel is a fire hazard. When trans- porting and storing the outboard motor, close the fuel cock to prevent fuel from leaking. Never get under the engine while it is tilted. Severe injury could occur if the

outboard motor accidentally falls.

NOTICE

ECM00660

Do not use the tilt support lever or knob when trailering the boat. The outboard motor could shake loose from the tilt sup- port and fall. If the motor cannot be trail- ered in the normal running position, use an additional support device to secure it

in the tilt position.

The outboard motor should be trailered and stored in the normal running position. If there is insufficient road clearance in this position, then trailer the outboard motor in the tilt po- sition using a motor support device such as a transom saver bar. Consult your Yamaha dealer for further details.

EMU30272

Storing outboard motor

When storing your Yamaha outboard motor

for prolonged periods of time (2 months or longer), several important procedures must be performed to prevent excessive damage. It is advisable to have your outboard motor serviced by an authorized Yamaha dealer prior to storage. However, you, the owner, with a minimum of tools, can perform the fol- lowing procedures.

NOTICE

ECM01411

Do not place the outboard motor on its side before the cooling water has drained from it completely, otherwise water may enter the cylinder through the exhaust port and cause engine trou- ble.

Store the outboard motor in a dry, well-

ventilated place, not in direct sunlight.

EMU28303

Procedure

EMU28383

Flushing with the flushing attachment

1. Wash the outboard motor body using fresh water.

NOTICE:

Do not spray wa- ter into the air intake.

[ECM01840]

For fur- ther information, see page 55.

2. Fill the fuel tank with fresh fuel and add one ounce of Yamaha Fuel Conditioner and Stabilizer to each gallon of fuel.

TIP:

The use of Yamaha Fuel Conditioner and Stabilizer eliminates the need to drain the fuel system. Consult your Yamaha dealer or other qualified mechanic if the fuel system is to be drained instead. 3. Remove the top cowling and silencer

cover/cap. Remove the propeller. 4. Install the flushing attachment over the

cooling water inlet.

NOTICE:

Do not run the engine without supplying it with cooling water. Either the engine wa-

ZMU03122

Maintenance

54

ter pump will be damaged or the en- gine will be damaged from overheating. Before starting the en- gine, be sure to supply water to the cooling water passages. Avoid run- ning the outboard motor at high speed while on the flushing attach- ment, otherwise overheating could occur.

[ECM02000]

5. Cooling system flushing is essential to prevent the cooling system from clog- ging up with salt, sand, or dirt. In addi- tion, fogging/lubricating of the engine is mandatory to prevent excessive engine damage due to rust. Perform the flush- ing and fogging at the same time.

WARNING! Do not touch or remove electrical parts when starting or dur- ing operation. Keep hands, hair, and clothes away from the flywheel and other rotating parts while the engine is running.

[EWM00091]

6. Run the engine at a fast idle for 1015

minutes in neutral position while supply- ing fresh water.

7. Just prior to turning off the engine, quick- ly spray Yamaha Stor-Rite Engine Fogging Oil alternately into each carbu- retor/each intake manifold. When prop-

erly done, the engine will smoke excessively and almost stall.

8. Remove the flushing attachment and wipe off any excess water.

9. Install the silencer cover/cap and top cowling. Install the propeller.

TIP:

A flushing attachment is available from your Yamaha dealer.

EMU28411

Lubrication (oil injection models)

1. Install the spark plug(s) and torque to proper specification. For information on spark plug installation, see page 61.

2. Fill the oil tanks. This prevents the for- mation of condensation. For models with a remote oil tank, it may be necessary to manually override the control unit to completely fill the engine oil tank.

3. Change the gear oil. For instructions, see page 65. Inspect the oil for the pres- ence of water which indicates a leaky seal. Seal replacement should be per- formed by an authorized Yamaha dealer prior to use.

4. Grease all grease fittings. For further de- tails, see page 61.

TIP:

For long-term storage, fogging the engine with oil is recommended. Contact your Yamaha dealer for information about fogging oil and procedures for your engine.

EMU28423

Cleaning and anticorrosion measures

1. Wash down the exterior of the outboard motor with fresh water and dry off com- pletely.

NOTICE:

Do not spray water into the air intake.

[ECM01840]

2. Spray the outboard motor exterior with

Yamaha Silicone Protectant.

1. Flushing attachment

Maintenance

55

3. Wax the cowling with a non-abrasive wax such as Yamaha Silicone Wax.

EMU28443

Flushing power unit

Perform this procedure right after operation for the most thorough flushing.

NOTICE

ECM01530

Do not perform this procedure while the engine is running. The water pump may be damaged and severe damage from

overheating can result.

1. After shutting off the engine, unscrew the garden hose connector from the fit- ting on the bottom cowling.

2. Screw the garden hose adapter onto a garden hose, which is connected to a fresh water supply, and then connect it

to the garden hose connector. 3. With the engine off, turn on the water tap

and let the water flush through the cool- ing passages for about 15 minutes. Turn off the water and disconnect the garden hose adapter from the garden hose con- nector.

4. Reinstall the garden hose connector onto the fitting on the bottom cowling. Tighten the connector securely.

NO- TICE:

Do not leave the garden hose connector loose on the bottom cowl- ing fitting or let the hose hang free during normal operation. Water will leak out of the connector instead of cooling the engine, which can cause serious overheating. Be sure the con- nector is tightened securely on the fitting after flushing the engine.

[ECM00541]

TIP:

When flushing the engine with the boat in the water, tilting up the outboard motor un- til it is completely out of the water will achieve better results.

For cooling system flushing instructions, see page 53.

EMU28450

Cleaning the outboard motor

After use, wash the exterior of the outboard motor with fresh water. Flush the cooling system with fresh water.

1. Fitting 2. Garden hose connector 3. Garden hose adapter

2 3 1

ZMU03556

Maintenance

56

TIP:

For cooling system flushing instructions, see page 53.

EMU28460

Checking painted surface of motor

Check the motor for scratches, nicks, or flak- ing paint. Areas with damaged paint are more likely to corrode. If necessary, clean and paint the areas. A touch-up paint is avail- able from your Yamaha dealer.

EMU2848A

Periodic maintenance

WARNING

EWM01871

These procedures require mechanical skills, tools, and supplies. If you do not have the proper skills, tools, or supplies to perform a maintenance procedure, have a Yamaha dealer or other qualified mechanic do the work. The procedures involve disassembling the motor and exposing dangerous parts. To reduce the risk of injury from moving, hot, or electrical parts:

Turn off the engine and keep the key(s) and engine shut-off cord (lanyard) with you when you perform maintenance unless otherwise specified.

The power trim and tilt switches oper- ate even when the ignition key is off. Keep people away from the switches

whenever working around the motor. When the motor is tilted, keep away from the area under it or between it and the clamp bracket. Be sure no one is in this area before operating the power trim and tilt mechanism.

Allow the engine to cool before han- dling hot parts or fluids.

Always completely reassemble the mo-

tor before operation.

Maintenance, replacement, or repair of the emission control devices and sys- tems may be performed by any marine engine repair establishment or individual. All warranty repairs, however, including those to the emission control system, must be performed by an authorized Yamaha marine dealership.

A service manual is available for purchase through your Yamaha dealer for owners who have the mechanical skills, tools, and other equipment necessary to perform mainte- nance not covered by this owners manual.

EMU28511

Replacement parts

If replacement parts are necessary, use only genuine Yamaha parts or parts of equivalent design and quality. Any part of inferior quality may malfunction, and the resulting loss of control could endanger the operator and passengers. Yamaha genuine parts and ac- cessories are available from your Yamaha dealer.

EMU35520

Maintenance interval guidelines

The service intervals provided in the Mainte- nance Chart were developed based upon typical use that includes operating at varied speeds, with sufficient time for engine warm up and cool-down, a medium to light load, and an average cruising speed near the

ZMU02550

Maintenance

57

3000 to 4000 rpm range. As with any engine, however, if your normal operating conditions are different, you should consider service more often than shown, especially how often you change your engine and gear oil. Exam- ples might include extended wide-open- throttle use or long periods of trolling or idling, carrying heavy loads, or frequent starting and stopping or shifting. More fre- quent maintenance will often pay off many times over in increased engine life and great- er owner satisfaction. Consult your Yamaha dealer for additional maintenance recom- mendations.

Maintenance

58

EMU34445

Maintenance chart 1 TIP:

Refer to the sections in this chapter for explanations of each owner-specific action.

The maintenance cycle on these charts assume usage of 100 hours per year and regular flushing of the cooling water passages. Maintenance frequency should be adjusted when operating the engine under adverse conditions such as extended trolling.

Disassembly or repairs may be necessary depending on the outcome of maintenance checks.

Expendable or consumable parts and lubricants will lose their effectiveness over time and through normal usage regardless of the warranty period.

When operating in salt water, muddy, other turbid (cloudy), acidic water, the engine should be flushed with clean water after each use.

The symbol indicates the check-ups which you may carry out yourself. The symbol indicates work to be carried out by your Yamaha dealer.

Item Actions

Initial Every

20 hours (3

months)

100 hours (1

year)

300 hours (3 years)

500 hours (5 years)

Anode(s) (external) Inspection or replace- ment as necessary

Anode(s) (cylinder head, thermostat cover)

Inspection or replace- ment as necessary

Anodes (exhaust cover, cooling water passage cover, Rectier Regula- tor cover)

Replacement

Battery (electrolyte level, terminal)

Inspection

Battery (electrolyte level, terminal)

Fill, charging or replac- ing as necessary

Cooling water leakage Inspection or replace- ment as necessary

Cowling clamp Inspection

Engine starting condi- tion/Noise

Inspection

Engine idling speed/ Noise

Inspection

Fuel lter (can be dis- assembled)

Inspection or replace- ment as necessary

Fuel line(High pres- sure)

Inspection

Maintenance

59

Fuel line(High pres- sure)

Inspection or replace- ment as necessary

Fuel line(Low pres- sure)

Inspection

Fuel line(Low pres- sure)

Inspection or replace- ment as necessary

Fuel pump Inspection or replace- ment as necessary

Fuel/oil leakage Inspection

Gear oil Replacement

Greasing points Greasing

Impeller/water pump housing

Inspection or replace- ment as necessary

Impeller/water pump housing

Replacement

Oil tank water drain Inspection or cleaning

Oil injection pump/oil feed pump

Inspection or Adjust- ment

Power trim & tilt unit/ Operation,noise and oil leakage

Inspection

Propeller/Propeller nut/ Cotter pin

Inspection or replace- ment as necessary

PCV (Pressure Con- trol Valve)

Inspection or replace- ment as necessary

Shift link/shift cable Inspection, adjustment or replacement as nec- essary

Spark plug(s) Inspection or replace- ment as necessary

Spark plug caps/high tension cords

Inspection or replace- ment as necessary

Water from the cooling water pilot hole

Inspection

Throttle link/Throttle cable/Throttle pick-up timing

Inspection, adjustment or replacement as nec- essary

Thermostat Inspection or replace- ment as necessary

Item Actions

Initial Every

20 hours (3

months)

100 hours (1

year)

300 hours (3 years)

500 hours (5 years)

Maintenance

60

EMU34451

Maintenance chart 2

Water inlet Inspection

Main switch/stop switch/choke switch

Inspection or replace- ment as necessary

Wire harness connec- tions/Wire coupler con- nections

Inspection or replace- ment as necessary

(Yamaha) Meter/gauge Inspection

Item Actions Every

1000 hours

Guide exhaust/exhaust manifold

Inspection or replace- ment as necessary

Item Actions

Initial Every

20 hours (3

months)

100 hours (1

year)

300 hours (3 years)

500 hours (5 years)

Maintenance

61

EMU28932

Greasing

Yamaha marine grease (Water resistant grease)

150

EMU28955

Cleaning and adjusting spark plug

The spark plug is an important engine com- ponent and is easy to inspect. The condition of the spark plug can indicate something about the condition of the engine. For exam- ple, if the center electrode porcelain is very

white, this could indicate an intake air leak or carburetion problem in that cylinder. Do not attempt to diagnose any problems yourself. Instead, take the outboard motor to a Yamaha dealer. You should periodically re- move and inspect the spark plug because heat and deposits will cause the spark plug

ZMU03912

Maintenance

62

to slowly break down and erode. If electrode erosion becomes excessive, or if carbon and other deposits are excessive, you should re- place the spark plug with another of the cor- rect type. 1. Remove the spark plug caps from the

spark plugs. 2. Remove the spark plug. If electrode ero-

sion becomes excessive, or if carbon and other deposits are excessive, you should replace the spark plug with an- other of the correct type.

WARNING! When removing or installing a spark plug, be careful not to damage the in- sulator. A damaged insulator could allow external sparks, which could lead to explosion or fire.

[EWM00561]

3. Be sure to use the specified spark plug, otherwise the engine may not operate properly. Before fitting the spark plug, measure the electrode gap with a wire thickness gauge; adjust the gap to spec- ification if necessary.

4. When fitting the plug, wipe off any dirt from the threads, and then screw it in to the correct torque.

TIP:

If a torque-wrench is not available when you are fitting a spark plug, a good estimate of the correct torque is 1/4 to 1/2 a turn past fin- ger-tight. Have the spark plug adjusted to the correct torque as soon as possible with a torque-wrench.

EMU37450

Checking fuel filter

Check the fuel filter periodically. If any water or foreign matter is found in the filter, clean or replace it. For cleaning or replacement of the fuel filter, consult your Yamaha dealer.

EMU29041

Inspecting idling speed

WARNING

EWM00451

Do not touch or remove electrical parts when starting or during operation.

Keep hands, hair, and clothes away from the flywheel and other rotating

Standard spark plug: BR7HS-10

1. Spark plug gap 2. Spark plug I.D. mark (NGK) 3. Spark plug part number

Spark plug gap: 0.91.0 mm (0.0350.039 in)

Spark plug torque: 25.0 Nm (2.55 kgf-m, 18.4 ft-lb)

ZMU06217

Maintenance

63

parts while the engine is running.

NOTICE

ECM00490

This procedure must be performed while the outboard motor is in the water. A flushing attachment or test tank can be

used.

A diagnostic tachometer should be used for this procedure. Results may vary depending on whether testing is conducted with the flushing attachment, in a test tank, or with the outboard motor in the water. 1. Start the engine and allow it to warm up

fully in neutral until it is running smooth- ly.

TIP:

Correct idling speed inspection is only possi- ble if the engine is fully warmed up. If not warmed up fully, the idle speed will measure higher than normal. If you have difficulty ver- ifying the idle speed, or the idle speed re- quires adjustment, consult a Yamaha dealer or other qualified mechanic. 2. Verify whether the idle speed is set to

specification. For idle speed specifica- tions, see page 13.

EMU29050

Checking water in engine oil tank

Oil injection models

There is a water trap at the bottom of the en- gine oil tank. If water or foreign matter is vis- ible in this trap, consult your Yamaha dealer.

EMU29112

Checking wiring and connectors

Check that each grounding wire is properly secured.

Check that each connector is engaged se- curely.

EMU32111

Checking propeller

WARNING

EWM01880

You could be seriously injured if the en- gine accidentally starts when you are near the propeller.

Before inspecting, removing, or install- ing the propeller, place the shift control in neutral, turn the main switch to (off) and remove the key, and remove the clip from the engine shut-off switch.

1. Water trap 2. Engine oil tank

2 1

ZMU01895

ZMU03915

Maintenance

64

Turn off the battery cut-off switch if

your boat has one.

Do not use your hand to hold the propeller when loosening or tightening the propeller nut. Put a wood block between the anti-cavi- tation plate and the propeller to prevent the propeller from turning.

Checkpoints

Check each of the propeller blades for wear, erosion from cavitation or ventila- tion, or other damage.

Check the propeller shaft for damage.

Check the splines for wear or damage.

Check for fish line tangled around the pro- peller shaft.

Check the propeller shaft oil seal for dam- age.

EMU30661

Removing propeller

EMU29197

Spline models

1. Straighten the cotter pin and pull it out using a pair of pliers.

2. Remove the propeller nut, washer, and spacer (if equipped).

WARNING! Do not use your hand to hold the propel- ler when loosening the propeller nut.

[EWM01890]

3. Remove the propeller, washer (if equipped), and thrust washer.

EMU30671

Installing propeller

EMU29233

Spline models

NOTICE

ECM00500

Be sure to use a new cotter pin and bend the ends over securely. Otherwise the propeller could come off during opera-

tion and be lost.

1. Apply Yamaha marine grease or a cor- rosion resistant grease to the propeller

ZMU01897

1. Cotter pin 2. Propeller nut 3. Washer 4. Spacer 5. Propeller 6. Thrust washer

Maintenance

65

shaft. 2. Install the spacer (if equipped), thrust

washer, washer (if equipped), and pro- peller on the propeller shaft.

NOTICE:

Be sure to install the thrust washer before installing the propeller, other- wise the lower case and propeller boss could be damaged.

[ECM01880]

3. Install the spacer (if equipped) and the

washer. Tighten the propeller nut to the specified torque.

4. Align the propeller nut with the propeller shaft hole. Insert a new cotter pin in the hole and bend the cotter pin ends.

NO- TICE:

Do not reuse the cotter pin in- stalled. Otherwise the propeller can come off during operation.

[ECM01890]

TIP:

If the propeller nut does not align with the propeller shaft hole after tightening to the specified torque, tighten the nut further to align it with the hole.

EMU29287

Changing gear oil

WARNING

EWM00800

Be sure the outboard motor is securely fastened to the transom or a stable

stand. You could be severely injured if the outboard motor falls on you.

Never get under the lower unit while it is tilted, even when the tilt support lever or knob is locked. Severe injury could occur if the outboard motor accidental-

ly falls.

1. Tilt the outboard motor so that the gear oil drain screw is at the lowest point pos- sible.

2. Place a suitable container under the gear case.

3. Remove the gear oil drain screw and gasket.

NOTICE:

If there is an exces- sive quantity of metal particles on the magnetic gear oil drain screw, this can indicate lower unit problem. Con- sult your Yamaha dealer.

[ECM01900]

TIP:

If a magnetic gear oil drain screw is equipped, remove all metal particles from the screw before installing it.

Always use new gaskets. Do not reuse the removed gaskets.

4. Remove the oil level plug and gasket to allow the oil to drain completely.

NO- TICE:

Inspect the used oil after it has

Propeller nut tightening torque: 55.0 Nm (5.61 kgf-m, 40.6 ft-lb)

1. Gear oil drain screw 2. Oil level plug

1

2

ZMU01899

Maintenance

66

been drained. If the oil is milky, water is getting into the gear case which can cause gear damage. Consult a Yamaha dealer for repair of the lower unit seals.

[ECM00711]

TIP:

For disposal of used oil, consult your Yamaha dealer. 5. Put the outboard motor in a vertical po-

sition. Using a flexible or pressurized fill- ing device, inject the gear oil into the gear oil drain screw hole.

6. Put a new gasket on the oil level plug. When the oil begins to flow out of the oil level plug hole, insert and tighten the oil level plug.

7. Put a new gasket on the gear oil drain screw. Insert and tighten the gear oil drain screw.

EMU29312

Inspecting and replacing anode(s)

Yamaha outboard motors are protected from corrosion by sacrificial anodes. Inspect the external anodes periodically. Remove scales from the surfaces of the anodes. Consult a Yamaha dealer for replacement of external anodes.

NOTICE

ECM00720

Do not paint anodes, as this would render

them ineffective.

TIP:

Inspect ground leads attached to external anodes on equipped models. Consult a Yamaha dealer for inspection and replace- ment of internal anodes attached to the pow- er unit.

Recommended gear oil: Hypoid gear oil SAE#90

Gear oil quantity: 0.980 L (1.036 US qt, 0.862 Imp.qt)

Tightening torque: 9 Nm (0.9 kgf-m, 6.6 ft-lb)

Tightening torque: 9 Nm (0.9 kgf-m, 6.6 ft-lb)

ZMU01900 ZMU01901

ZMU03461

Maintenance

67

EMU29322

Checking battery (for electric start models)

WARNING

EWM01900

Battery electrolytic fluid is poisonous and caustic, and batteries generate ex- plosive hydrogen gas. When working near the battery:

Wear protective eye gear and rubber gloves.

Do not smoke or bring any other source of ignition near the battery.

Refer to page 14 for detailed safety infor-

mation about batteries.

The procedure for checking the battery var- ies for different batteries. This procedure contains typical checks that apply to many batteries, but you should always refer to the battery manufacturers instructions.

NOTICE

ECM01920

A poorly maintained battery will quickly

deteriorate.

1. Check the electrolyte level.

2. Check the batterys charge. If your boat is equipped with the digital speedome- ter, the voltmeter and low battery alert functions will help you monitor the bat- terys charge. If the battery needs charg-

ing, consult your Yamaha dealer. 3. Check the battery connections. They

should be clean, secure, and covered by an insulating cover.

WARNING! Bad connections can produce shorting or arcing and cause an explosion.

[EWM01910]

EMU35493

Connecting the battery

WARNING

EWM00570

Mount the battery holder securely in a dry, well-ventilated, vibration-free loca- tion in the boat. Install a fully charged bat-

tery in the holder.

NOTICE

ECM01123

Reversal of the battery cables will dam-

age the electrical parts.

1. Make sure the main switch (on applica- ble models) is (off) before working on the battery.

2. Connect the red battery cable to the POSITIVE (+) terminal first. Then con- nect the black battery cable to the NEG- ATIVE (-) terminal.

3. The electrical contacts of the battery and

1. Red cable 2. Black cable 3. Battery

Maintenance

68

cables must be clean and properly con- nected, or the battery will not start the engine.

Connecting an accessory battery (optional) 1. If connecting an accessory battery, con-

sult your Yamaha dealer about correct wiring. For the fuse size, see ABYC (E- 11).

Single engine

EMU29371

Disconnecting the battery

1. Turn off the battery cut-off switch (if equipped) and main switch.

NOTICE:

If they are left on, the electrical system can be damaged.

[ECM01930]

2. Disconnect the negative cable(s) from the negative (-) terminal.

NOTICE:

Al- ways disconnect all negative (-) ca- bles first to avoid a short circuit and damage to the electrical system.

[ECM01940]

3. Disconnect the positive cable(s) and re-

move the battery from the boat. 4. Clean, maintain, and store the battery

according to the manufacturers instruc- tions.

1. Isolator lead with circuit protection 2. Red cable 3. Black cable 4. Fuse 5. Battery for accessories 6. Battery for starting 7. Negative connecting cable

2 1

7

6 5

3

4

ZMU05939

69

Trouble Recovery

EMU29427

Troubleshooting

A problem in the fuel, compression, or igni- tion systems can cause poor starting, loss of power, or other problems. This section de- scribes basic checks and possible remedies, and covers all Yamaha outboard motors. Therefore some items may not apply to your model. If your outboard motor requires repair, bring it to your Yamaha dealer. If the engine trouble-alert indicator is flash- ing, consult your Yamaha dealer.

Starter will not operate.

Q. Is battery capacity weak or low? A. Check battery condition. Use battery of recommended capacity.

Q. Are battery connections loose or corrod- ed? A. Tighten battery cables and clean battery terminals.

Q. Is fuse for electric start relay or electric cir- cuit blown? A. Check for cause of electric overload and repair. Replace fuse with one of correct am- perage.

Q. Are starter components faulty? A. Have serviced by a Yamaha dealer.

Q. Is shift lever in gear? A. Shift to neutral.

Engine will not start (starter operates).

Q. Is fuel tank empty? A. Fill tank with clean, fresh fuel.

Q. Is fuel contaminated or stale?

A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged? A. Clean or replace filter.

Q. Is starting procedure incorrect? A. See page 43.

Q. Has fuel pump malfunctioned? A. Have serviced by a Yamaha dealer.

Q. Are spark plug(s) fouled or of incorrect type? A. Inspect spark plug(s). Clean or replace with recommended type.

Q. Are spark plug cap(s) fitted incorrectly? A. Check and re-fit cap(s).

Q. Is ignition wiring damaged or poorly con- nected? A. Check wires for wear or breaks. Tighten all loose connections. Replace worn or bro- ken wires.

Q. Are ignition parts faulty? A. Have serviced by a Yamaha dealer.

Q. Is engine shut-off cord (lanyard) not at- tached? A. Attach cord.

Q. Are engine inner parts damaged? A. Have serviced by a Yamaha dealer.

Engine idles irregularly or stalls.

Q. Are spark plug(s) fouled or of incorrect type? A. Inspect spark plug(s). Clean or replace with recommended type.

Trouble Recovery

70

Q. Is fuel system obstructed? A. Check for pinched or kinked fuel line or other obstructions in fuel system.

Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged? A. Clean or replace filter.

Q. Have ignition parts failed? A. Have serviced by a Yamaha dealer.

Q. Has alert system activated? A. Find and correct cause of alert.

Q. Is spark plug gap incorrect? A. Inspect and adjust as specified.

Q. Is ignition wiring damaged or poorly con- nected? A. Check wires for wear or breaks. Tighten all loose connections. Replace worn or bro- ken wires.

Q. Is specified engine oil not being used? A. Check and replace oil as specified.

Q. Is thermostat faulty or clogged? A. Have serviced by a Yamaha dealer.

Q. Are carburetor adjustments incorrect? A. Have serviced by a Yamaha dealer.

Q. Is fuel pump damaged? A. Have serviced by a Yamaha dealer.

Q. Is air vent screw on fuel tank closed? A. Open air vent screw.

Q. Is choke knob pulled out?

A. Return to home position.

Q. Is motor angle too high? A. Return to normal operating position. Q. Is carburetor clogged? A. Have serviced by a Yamaha dealer.

Q. Is fuel joint connection incorrect? A. Connect correctly.

Q. Is throttle valve adjustment incorrect? A. Have serviced by a Yamaha dealer.

Q. Is battery cable disconnected? A. Connect securely.

Alert buzzer sounds or indicator lights.

Q. Is cooling system clogged? A. Check water intake for restriction.

Q. Is engine oil level low? A. Fill oil tank with specified engine oil.

Q. Is heat range of spark plug incorrect? A. Inspect spark plug and replace it with rec- ommended type.

Q. Is specified engine oil not being used? A. Check and replace oil with specified type.

Q. Is engine oil contaminated or deteriorat- ed? A. Replace oil with fresh, specified type.

Q. Is oil filter clogged? A. Have serviced by a Yamaha dealer.

Q. Has oil feed/injection pump malfunc- tioned? A. Have serviced by a Yamaha dealer.

Trouble Recovery

71

Q. Is load on boat improperly distributed? A. Distribute load to place boat on an even plane.

Q. Is water pump or thermostat faulty? A. Have serviced by a Yamaha dealer.

Q. Is there excess water in fuel filter cup? A. Drain filter cup.

Engine power loss.

Q. Is propeller damaged? A. Have propeller repaired or replaced.

Q. Is propeller pitch or diameter incorrect? A. Install correct propeller to operate out- board at its recommended speed (r/min) range.

Q. Is trim angle incorrect? A. Adjust trim angle to achieve most efficient operation.

Q. Is motor mounted at incorrect height on transom? A. Have motor adjusted to proper transom height.

Q. Has alert system activated? A. Find and correct cause of alert.

Q. Is boat bottom fouled with marine growth? A. Clean boat bottom.

Q. Are spark plug(s) fouled or of incorrect type? A. Inspect spark plug(s). Clean or replace with recommended type.

Q. Are weeds or other foreign matter tangled

on gear housing? A. Remove foreign matter and clean lower unit.

Q. Is fuel system obstructed? A. Check for pinched or kinked fuel line or other obstructions in fuel system.

Q. Is fuel filter clogged? A. Clean or replace filter.

Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel.

Q. Is spark plug gap incorrect? A. Inspect and adjust as specified.

Q. Is ignition wiring damaged or poorly con- nected? A. Check wires for wear or breaks. Tighten all loose connections. Replace worn or bro- ken wires.

Q. Have electrical parts failed? A. Have serviced by a Yamaha dealer.

Q. Is specified fuel not being used? A. Replace fuel with specified type.

Q. Is specified engine oil not being used? A. Check and replace oil with specified type.

Q. Is thermostat faulty or clogged? A. Have serviced by a Yamaha dealer.

Q. Is air vent screw closed? A. Open the air vent screw.

Q. Is fuel pump damaged? A. Have serviced by a Yamaha dealer.

Trouble Recovery

72

Q. Is fuel joint connection incorrect? A. Connect correctly.

Q. Is heat range of spark plug incorrect? A. Inspect spark plug and replace it with rec- ommended type.

Q. Is high pressure fuel pump drive belt bro- ken? A. Have serviced by a Yamaha dealer.

Q. Is engine not responding properly to shift lever position? A. Have serviced by a Yamaha dealer.

Engine vibrates excessively.

Q. Is propeller damaged? A. Have propeller repaired or replaced.

Q. Is propeller shaft damaged? A. Have serviced by a Yamaha dealer.

Q. Are weeds or other foreign matter tangled on propeller? A. Remove and clean propeller.

Q. Is motor mounting bolt loose? A. Tighten bolt.

Q. Is steering pivot loose or damaged? A. Tighten or have serviced by a Yamaha dealer.

EMU29433

Temporary action in emergency

EMU29440

Impact damage

WARNING

EWM00870

The outboard motor can be seriously damaged by a collision while operating or

trailering. Damage could make the out-

board motor unsafe to operate.

If the outboard motor hits an object in the wa- ter, follow the procedure below.

1. Stop the engine immediately. 2. Inspect the control system and all com-

ponents for damage. Also inspect the boat for damage.

3. Whether damage is found or not, return to the nearest harbor slowly and careful- ly.

4. Have a Yamaha dealer inspect the out- board motor before operating it again.

EMU29463

Replacing fuse

If the fuse has blown on an electric start model, open the fuse holder and replace the fuse with a new one of the proper amperage.

WARNING

EWM00631

Substituting an incorrect fuse or a piece of wire could allow excessive current flow. This could cause electric system

damage and a fire hazard.

Trouble Recovery

73

Consult your Yamaha dealer if the new fuse immediately blows again.

EMU29524

Power trim and tilt will not operate

If the engine cannot be tilted up or down with the power trim and tilt because of a dis- charged battery or a failure with the power trim and tilt unit, the engine can be tilted manually. 1. Loosen the manual valve screw by turn-

ing it counterclockwise until it stops.

2. Put the engine in the desired position, then tighten the manual valve screw by turning it clockwise.

EMU29533

Starter will not operate

If the starter mechanism does not operate (the engine cannot be cranked with the start- er), the engine can be started with an emer- gency starter rope.

WARNING

EWM01022

Use this procedure only in an emergen- cy to return to the nearest port for re- pairs.

When the emergency starter rope is used to start the engine, the start-in- gear protection device does not oper- ate. Make sure the remote control lever is in neutral. Otherwise the boat could unexpectedly start to move, which could result in an accident.

Attach the engine shut-off cord to a se- cure place on your clothing, or your arm or leg while operating the boat.

Do not attach the cord to clothing that could tear loose. Do not route the cord where it could become entangled, pre- venting it from functioning.

Avoid accidentally pulling the cord dur- ing normal operation. Loss of engine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward.

Make sure no one is standing behind you when pulling the starter rope. It could whip behind you and injure someone.

An unguarded, rotating flywheel is very dangerous. Keep loose clothing and other objects away when starting the engine. Use the emergency starter rope only as instructed. Do not touch the fly-

1. Fuse holder 2. Fuse (20 A, 30 A)

1. Manual valve screw

1

2

ZMU03919

ZMU03464

1

Trouble Recovery

74

wheel or other moving parts when the engine is running. Do not install the starter mechanism or top cowling after the engine is running.

Do not touch the ignition coil, spark plug wire, spark plug cap, or other elec- trical components when starting or op- erating the motor. You could get an

electrical shock.

EMU29562

Emergency starting engine

1. Remove the top cowling. 2. Remove the start-in-gear protection ca-

ble from the starter, if equipped. 3. Remove the starter/flywheel cover after

removing the bolt(s).

4. Prepare the engine for starting. For fur- ther information, see page 43. Be sure the engine is in neutral and that the clip is attached to the engine shut-off switch. The main switch must be (on), if equipped.

5. If equipped the choke knob, pull out it when the engine is cold. After the engine starts, gradually return the choke knob to its home position as the engine warms up.

6. Insert the knotted end of the emergency starter rope into the notch in the flywheel rotor and wind the rope several turns around the flywheel clockwise.

ZMU03920

ZMU02334

ON STARTOFF

ZMU01906

ZMU03921

Trouble Recovery

75

7. Give a strong pull straight out to crank and start the engine. Repeat if neces- sary.

EMU29671

Engine fails to operate

EMU29691

Ignition system malfunction

If the battery voltage is low or in the unlikely event of an ignition system malfunction, the engine speed may become erratic or the en- gine may stop. In such a situation, follow the procedure below. 1. Remove the CDI unit cover or electrical

cover, if equipped.

2. Disconnect the yellow cord (emergency circuit) of the CDI unit to return to port.

WARNING

EWM00350

When the yellow cord is disconnected, the idle and low speeds are slightly high- er than normal. Use care when starting off

or stopping.

NOTICE

ECM00380

Follow this procedure only in an emer- gency and just long enough to return to

port for repairs.

EMU29742

Low oil level alert activates

If the oil level is allowed to drop too low, the red segment will appear on the oil level indi- cator, the buzzer will sound, and engine speed will be limited to about 2000 r/min. If this happens, a reserve amount of oil can be pumped from the remote oil tank to the en- gine oil tank using the emergency switch.

WARNING

EWM01050

Be sure to stop the engine before per-

forming this procedure.

NOTICE

ECM00901

If the emergency switch is held up too long, too much oil will be pumped into the engine oil tank, overflowing it. Re- lease the switch when oil reaches the upper level line on the engine oil tank.

Do not use this emergency procedure

ZMU03466

ZMU03923

1. CDI unit 2. Yellow cord

1

2

ZMU03924

Trouble Recovery

76

unless the oil level-alert indicators are

working.

1. Remove the top cowling. 2. Turn on the main switch.

3. Lift the emergency switch to pump re- serve oil into the engine oil tank from the remote oil tank.

4. After using the emergency switch, turn off the main switch, then turn it back on. This resets the alert system to normal operation. The yellow segment will con- tinue to be displayed on the oil level indi- cator.

5. Start the engine and return to the near- est port for more oil.

TIP:

The maximum reserve oil capacity is 1500 cm

3

(1.6 US qt, 1.31 Imp qt).

The oil-feed pump will not operate if the engine is tilted up more than 35. Put the engine in the upright position (not tilted) before using the emergency switch.

EMU33501

Treatment of submerged motor

If the outboard motor is submerged, immedi- ately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immedi- ately.

NOTICE:

Do not attempt to run the outboard motor until it has been com- pletely inspected.

[ECM00401]

1. Emergency switch

1. Engine oil tank

ON STARTOFF

ZMU01906

1 ZMU03925

1 2 ZMU01908

2. Remote oil tank

77

Consumer information

EMU29811

Important warranty information for U.S.A. and Canada

Consumer information

78

Consumer information

79

EMU29820

YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY

Consumer information

80

Consumer information

81

Consumer information

82

EMU29841

IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA

64C-9-1F Hyoshi 08.2.29 3:26 PM 3

Printed in Japan April 20080.1 1 ! Printed on recycled paper

64C-9-1F Hyoshi 08.2.29 3:26 PM 4

Manualsnet FAQs

If you want to find out how the 150TXR Yamaha works, you can view and download the Yamaha 150TXR Owner's Manual on the Manualsnet website.

Yes, we have the Owner's Manual for Yamaha 150TXR as well as other Yamaha manuals. All you need to do is to use our search bar and find the user manual that you are looking for.

The Owner's Manual should include all the details that are needed to use a Yamaha 150TXR. Full manuals and user guide PDFs can be downloaded from Manualsnet.com.

The best way to navigate the Yamaha 150TXR Owner's Manual is by checking the Table of Contents at the top of the page where available. This allows you to navigate a manual by jumping to the section you are looking for.

This Yamaha 150TXR Owner's Manual consists of sections like Table of Contents, to name a few. For easier navigation, use the Table of Contents in the upper left corner.

You can download Yamaha 150TXR Owner's Manual free of charge simply by clicking the “download” button in the upper right corner of any manuals page. This feature allows you to download any manual in a couple of seconds and is generally in PDF format. You can also save a manual for later by adding it to your saved documents in the user profile.

To be able to print Yamaha 150TXR Owner's Manual, simply download the document to your computer. Once downloaded, open the PDF file and print the Yamaha 150TXR Owner's Manual as you would any other document. This can usually be achieved by clicking on “File” and then “Print” from the menu bar.