Yamaha F90B, F80B, F75B User Manual

Download

OWNER’S MANUAL

F75B F80B F90B

U.S.A.Edition

LIT-18626-05-09

EMU01448

TO THE OWNER

Thank you for choosing a Yamaha outboard motor. This Owner’s manual contains information needed for proper operation, maintenance and care. A thorough understanding of these simple instructions will help you obtain 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 Owner’s Manual particularly important information is distinguished in the following ways.

The Safety Alert Symbol means ATTENTION! BECOME ALERT!

YOUR SAFETY IS INVOLVED!

A CAUTION indicates special precautions that must be taken to avoid damage to the outboard motor.

NOTE:

A NOTE provides key information to make procedures easier or clearer.

* Yamaha continually seeks advance-

ments in product design and quality. Therefore, while this manual contains the most current product information available at the time of printing, there may be minor discrepancies between your machine and this manual. If there is any question concerning this manual, please consult your Yamaha dealer.

Failure to follow WARNING instructions could result in severe injury or death to the machine operator, a bystander, or a person inspecting or repairing the outboard motor.

EMU01446

F75B, F80B, F90B

OWNER'S MANUAL

1st Edition, March 2002

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Corporation, USA

is expressly prohibited.

Printed in Japan

P/N LIT-18626-05-09

NOTE:

The F90TR and its standard accessories are used as a base for the explanations and illustrations in this manual. Therefore, some items may not apply to every model.

EMU00003

GENERAL INFORMATION

BASIC COMPONENTS

OPERATION

MAINTENANCE

TROUBLE RECOVERY

INDEX

READ THIS OWNER’S MANUAL CAREFULLY

BEFORE OPERATING YOUR OUTBOARD MOTOR.

EMU00004

Chapter 1

GENERAL

INFORMATION

IDENTIFICATION NUMBERS RECORD ..1-1

Outboard motor serial number...........1-1

Key number...........................................1-1

EMISSION CONTROL INFORMATION...1-2

SAFETY INFORMATION..........................1-4

IMPORTANT LABELS ..............................1-6

BASIC BOATING RULES .........................1-7

FUELING INSTRUCTIONS.....................1-11

Gasoline ..............................................1-12

ENGINE OIL ............................................1-13

BATTERY REQUIREMENT ....................1-14

PROPELLER SELECTION .......................1-14

START-IN-GEAR PROTECTION ............1-16

F1001

904011*

123

YAMAHA

EMU00005

IDENTIFICATION NUMBERS

RECORD

EMU00007

OUTBOARD MOTOR SERIAL NUMBER

YAMAHA MOTOR CO., LTD. MADE IN JAPAN PAYS D'ORIGINE JAPON

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 stolen.

1 Outboard motor serial number

EMU00008

KEY NUMBER

If a main key switch is equipped with the motor, 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 Key number

1-1

EMISSION CONTROL INFORMATION

ENGINE FAMILY :

THIS ENGINE CONFORMS TO 2001 U.S. EPA REGULATIONS FOR MARINE SI ENGINES. THIS ENGINE CONFORMS TO 2001 CALIFORNIA EMISSION REGULATIONS FOR SI MARINE 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 EX

cm kw

g/kw-hr

rpm IN NEUTRAL

Manufactured:

EMU01385

EMISSION CONTROL

INFORMATION

EMU01387

NORTH AMERICAN MODELS

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

Approval label of Emission control certificate

This label is attached to the bottom cowling.

F1038

1 Emission control information label

New Technology ; (4-stroke) EM

Manufactured date label

This label is attached to the clamp bracket.

2 Manufactured date label

1-2

000847

EMU01389

STAR LABELS

Your outboard motor is labeled with a California Air Resources Board (CARB) star label. See below for a description of your particular label.

1 Star label

One Star - Low Emission

The one-star label identifies engines that meet the Air Resources Board’s 2001 exhaust emission standards. Engines meeting these standards have 75% lower emissions than conventional carbureted two-stroke engines. These engines are equivalent to the U.S. EPA’s 2006 standards for marine engines.

Two Stars - Very Low Emission

The two-star label identifies engines that meet the Air Resources Board’s 2004 exhaust emission standards. Engines meeting these standards have 20% lower emissions than One Star-Low-Emission engines.

Three Stars - Ultra Low Emission

The three-star label identifies engines that meet the Air Resources Board’s 2008 exhaust emission standards. Engines meeting these standards have 65% lower emissions than One Star-Low-Emission engines.

1-3

EMU00917

SAFETY

8 Before mounting or operating the out-

board motor, read this entire manual. Reading it should give you an understanding of the motor and its operation.

8 Before operating the boat, read any

owner’s or operator’s manuals supplied with it and all labels. Be sure you understand each item before operating.

8 Do not overpower the boat with this

outboard motor. Overpowering the boat could result in loss of control. The rated power of the outboard should be equal to or less than the rated horsepower capacity of the boat. If the rated horsepower capacity of the boat is unknown, consult the dealer or boat manufacturer.

8 Do not modify the outboard. Modifica-

tions could make the motor unfit or unsafe to use.

8 Never operate after drinking alcohol or

taking drugs. About 50% of all boating fatalities involve intoxication.

8 Have an approved personal flotation

device (PFD) on board for every occupant. It is a good idea to 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 boating conditions.

8 Gasoline is highly flammable, and its

vapors are flammable and explosive. Handle and store gasoline carefully. Make sure there are no gas fumes or leaking fuel before starting the engine.

INFORMATION

8 This product emits exhaust gases which

contain carbon monoxide, a colorless, odorless gas which may cause brain damage or death when inhaled. Symptoms include nausea, dizziness, and drowsiness. Keep cockpit and cabin areas well ventilated. Avoid blocking exhaust outlets.

8 Check throttle, shift, and steering for

proper operation before starting the engine.

8 Attach the engine stop switch lanyard

to a secure place on your clothing, or your arm or leg while operating. If you accidentally leave the helm, the lanyard will pull from the switch, stopping the engine.

8 Know the marine laws and regulations

where you will be boating - and obey them. Refer to “RULES OF THE ROAD” section for basic boating rules.

8 Stay informed about the weather.

Check weather forecasts before boating. Avoid boating in hazardous weather.

8 Tell someone where you are going:

leave a Float Plan with a responsible person. Be sure to cancel the Float Plan when you return.

8 Use common sense and good judgment

when boating. Know your abilities, and be sure you understand how your boat handles under the different boating conditions you may encounter. Operate within your limits, and the limits of your boat. Always operate at safe speeds, and keep a careful watch for obstacles and other traffic.

8 Always watch carefully for swimmers

during the engine operation.

8 Stay away from swimming areas.

1-4

8 When a swimmer is in the water near

you shift into neutral and shut off the engine.

8 Be informed about boating safety. Addi-

tional publications and information can be obtained from many organizations, including the following:

United States Coast Guard

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

National Marine Manufacturers

Association (NMMA)

401 N. Michigan Ave. Chicago, Il 60611

Marine Retailers Association of America

155 N. Michigan Ave. Chicago, Il 60601

1-5

EMU00014*

F1002

IMPORTANT LABELS

WARNING LABELS

8Be sure shift control is in neutral

WARNING

before starting engine. (except 2HP)

8Do not touch or remove electrical parts

when starting or during operation.

8Keep hands,hair,and clothes away from flywheel

and other rotating parts while engine is running.

6A1-83625-41

1-6

EMU00015

BASIC BOATING RULES

(Rules of the road)

Just as there are rules which apply when you are driving on streets and high ways, there are waterway rules which apply when you are driving your boat. These rules are used internationally, 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 encounter another vessel on the water.

Several sets of rules prevail according to geographic location, but are all basically the same as the International Rules of the Road. The rules presented here in your Owner’s Manual are condensed, and have been provided for your convenience only. Consult your local U.S. Coast Guard Auxiliary or Department of Motor Vehicles for a complete set of rules governing the waters in which you will be using your boat.

STEERING AND SAILING RULES AND SOUND SIGNALS

Whenever two vessels on the water meet one another, one vessel has the right-ofway; it is called the “stand-on” vessel. The vessel which does not have the rightof-way is called the “give-way” or “burdened” vessel. 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 which does not have the rightof-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 briefly 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 navigation and collision, and to any special circumstances, which may render a departure from the above rules necessary in order to avoid immediate danger.’

In other words, follow the standard rules except when a collision will occur unless both vessels try to avoid each other. If that is the case, both vessels become “Give-Way” vessels.

1-7

102045

RULES WHEN ENCOUNTERING VESSELS

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

Meeting (you are approaching another vessel head-on) Crossing (you are traveling across the other vessel’s 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-ofway to any vessels shown in white area (you are the Give-Way vessel). Any vessels in the shaded area must yield to you (they are the Give-Way vessels). Both you and the meeting vessel must alter course to avoid each other.

will clear one another if you continue on your set course and speed.

102044

Crossing

When two power driven vessels are crossing each other’s path close enough to run the risk of collision, the vessel which has the other 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 direction, provided the other vessel gives you the right-of-way as it should.

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 vessel on your port (left) side. This rule doesn’t apply if both of you

102046

Overtaking

If you are passing another vessel, you are the “Give-Way” vessel. This means that the other vessel is expected to maintain

1-8

its course and speed. You must stay out of its way until you are clear of it. Likewise, if another vessel is passing you, you should maintain your speed and direction so that the other vessel can steer itself around you.

OTHER SPECIAL SITUATIONS

There are three other rules you should be aware of when driving your boat around other 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 water vessels, the operator should sound a prolonged 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 proceed 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 which 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 vessels. Fishing vessels have the right-of-way regardless of position. Fishing vessels cannot, 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 powerdriven 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 which can navigate only in such a channel.

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 navigating in a particular direction. The markings on these buoys are oriented from the perspective of being entered from seaward (the boater is going towards the port). This means that red buoys are passed on the starboard (right) side when proceeding from open water into port, and black buoys are to port (left) side. When navigating out of port, your position with respect to the buoys should be reversed; 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 distinctive shapes and colors to show regulatory or advisory informa-

1-9

Proceeding toward head

of navigation from seaward

CAN BUOY

Odd number. Leave to port.

SECONDARY CHANNEL BUOYS

STARTS NEW NUMBERING SYSTEM

old new

C " 1

NUN BUOY

Even number. Leave to starboard

No change

BUOY

COLOR CODE

BLACK

RED

GREEN

SECONDARY CHANNEL

MAIN CHANNEL

old

new

Odd number. increasing toward head of naviga-

MAIN CHANNEL BUOYS

" "

tion.Leave to port (left) proceeding upstream.

LIGHTED BUOY (Port Hand)`

White Light

Green Light

old

new

old

new

old

new

LIGHTED BUOY (Starboard Hand)`

" "

Even number,increasing toward head of navigation. Leave to starboard (right) proceeding upstream.

White Light Red Light

LIGHTED SAFE WATER BUOY

No number. Marks midchannel, pass on either side. Letter has no lateral significance, used for

No number. Topmost band red

preferred

Top Mark

White Light

LIGHTED PREFERRED CHANNEL TO

PORT BUOY

identification and location purposes.

channel is to left of buoy. Letter has no lateral significance, used for identification and location purposes.

Red Light

Red or White Light

102052

tion. These markers are white with black letters and orange boarders. They signify speed zones, restricted areas, danger areas, and general information. Remember, markings may vary by geographic location. Always consult local boating authorities before driving your boat in unfamiliar waters.

1-10

EMU00016*

FUELING INSTRUCTIONS

GASOLINE AND ITS VAPORS ARE HIGHLY FLAMMABLE AND EXPLOSIVE! 8 Do not smoke when refueling, and

keep away from sparks, flames, or other sources of ignition.

8 Stop engine before refueling. 8 Refuel in a well-ventilated area. Refuel

portable fuel tanks off the boat.

8 Take care not to spill gasoline. If gaso-

line spills, wipe it up immediately with dry rags.

8 Do not overfill the fuel tank. 8 Tighten the filler cap securely after

refueling.

8 If you should swallow some gasoline

inhale a lot of gasoline vapor, or get gasoline in your eyes, get immediate medical attention.

8 If any gasoline spills onto your skin,

immediately wash with soap and water. Change clothing if gasoline spills on it.

8 Touch the fuel nozzle to the filler open-

ing or funnel to help prevent electrostatic sparks.

Use only new clean gasoline which has been stored in clean containers and is not contaminated with water or foreign matter.

1-11

EMU01804

GASOLINE

Recommended gasoline:

Regular unleaded gasoline with a minimum octane rating of 86 (Pump Octane Number) = (R+M)/2

If knocking or pinging occurs, use a different brand of gasoline or premium unleaded fuel.

EMU00027

Gasohol

There are two types of gasohol: gasohol containing ethanol and that containing methanol. Gasohol containing ethanol can be used if ethanol content does not exceed 10% and the fuel meets minimum octane ratings. Gasohol containing methanol is not recommended by Yamaha because it can cause fuel system damage or engine performance problems.

1-12

EMU01769

ENGINE OIL

Recommended engine oil: 4-stroke motor oil with a combination of corresponding SAE and API as shown in the chart.

SAE API

10W-30

10W-40

Engine oil quantity: See Chapter 4, “Specifications.”

All 4-stroke engines are shipped from the factory without engine oil.

001162

1-13

EMU01775

BATTERY REQUIREMENT

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

For electric start models, choose a battery which meets the following specifications.

EMU01860

Minimum cold cranking amps (CCA/SAE): 380 amps at -18°C (-0.4°F) Minimum marine cranking amps (MCA/ABYC): 502 amps at 0°C (32°F) Minimum reserve capacity (RC/SAE):

124 minutes

EMU01395

PROPELLER SELECTION

The performance of your outboard motor will be critically affected by your choice of propeller, as an incorrect choice could adversely affect performance and could also seriously damage the motor. Engine speed depends on the propeller size and boat load. If engine speed is too high or too low for good engine performance, this will have an adverse effect on the engine.

1-14

602015

15 - K

13 x 17 - K

qwe

602014

Yamaha outboard motors are fitted with propellers chosen to perform well over a range of applications, but there may be uses where a propeller with a different pitch would be more appropriate. For a greater operating load, a smaller-pitch propeller is more suitable as it enables the correct engine speed to be maintained. Conversely, a larger-pitch propeller is more suitable for a smaller operating load.

Yamaha dealers stock a range of propellers, and can advise you and install a propeller on your outboard that is best suited to your application.

NOTE:

At full throttle and under a maximum boat load, the engine’s rpm should be within the upper half of the full throttle operating range, as listed in “SPECIFICATIONS” on page 4-1. Select a propeller which fulfills this requirement. If operating under conditions which allow the engine’s rpm to rise above the maximum recommended range (such as light boat loads), reduce the throttle setting to maintain the rpm in the proper operating range.

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

Refer to the section “CHECKING PROPELLER” for instructions on propeller removal and installation.

1-15

EMU01209

START-IN-GEAR PROTECTION

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

1-16

-MEMO-

EMU00037

Chapter 2

BASIC COMPONENTS

MAIN COMPONENTS..............................2-1

OPERATIONS OF CONTROLS AND

OTHER FUNCTIONS ................................2-2

Remote control .....................................2-2

Trim tab .................................................2-6

Power trim/tilt switch ...........................2-7

Digital tachometer................................2-8

Tilt support lever ................................2-11

Top cowling lock levers .....................2-11

Flushing device...................................2-11

WARNING SYSTEM ..............................2-12

Overheat warning...............................2-12

Low oil pressure warning..................2-13

o i

EMU01206

MAIN COMPONENTS

1 Top cowling 2 Cowling lock lever 3 Oil drain bolt 4 Anti-cavitation plate 5 Trim tab (Anode) 6 Propeller 7 Cooling water inlet 8 Clamp bracket

9 Tilt support lever 0 Flushing device q Power trim and tilt switch

w Remote control box

e Digital tachometer

* May not be exactly as shown; also may not

be included as standard equipment on all models.

2-1

701036

701031

r t

EMU00039

OPERATIONS OF CONTROLS

AND

OTHER FUNCTIONS

EMU00096

REMOTE CONTROL

Both the shifter and the throttle are actuated by the remote control lever. In addition, this control also has the electrical switches.

1 Remote control lever 2 Neutral interlock trigger 3 Neutral throttle lever 4 Main switch 5 Engine stop lanyard switch 6 Power trim/tilt switch 7 Throttle friction adjusting screw

701011*

EMU00098

Remote Control Lever

Moving the lever forward from the Neutral position engages Forward gear. Pulling the lever back from Neutral engages Reverse. The engine will continue to run at idle until the lever is moved about 35° (a detent can be felt). Moving the lever farther opens the throttle, and the engine will begin to accelerate.

1 Neutral 5 Fully closed 2 Forward 6 Throttle 3 Reverse 7 Fully open 4 Shift

EMU00099

Neutral Interlock Trigger

To shift out of Neutral, the neutral interlock trigger of the remote control lever must first be pulled up.

2-2

EMU00100

701033*

STARTOFF

701045

Neutral Throttle Lever

To open the throttle without shifting into either Forward or Reverse, place the remote control lever in the Neutral position and lift the neutral throttle lever.

NOTE:

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 Fully open 2 Fully closed

EMU00101

Main switch

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

8 OFF

Electrical circuits switched off. (The key can be removed.)

8 ON

Electrical circuits switched on. (The key cannot be removed.)

8 START

Starter-motor will turn and start engine. (When the key is released, it returns automatically to “ON”.)

2-3

000569

EMU00934

Engine Stop Lanyard Switch

The lock-plate 1 must be attached to the engine stop lanyard switch for the engine to run. The lanyard 2 should be attached to a secure place on the operator’s clothing, or arm or leg. Should the operator fall overboard or leave the helm, the lanyard will pull out the lock plate, stopping ignition to the engine. This will prevent the boat from running away under power.

8 Attach the lanyard to a secure place on

your clothing, your arm or leg while operating.

8 Do not attach the lanyard to clothing

that could tear loose. Do not route the lanyard in such a way that it could become entangled, preventing it from functioning.

8 Avoid accidentally pulling the lanyard

during 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.

NOTE:

The engine cannot be started with the lock-plate removed.

2-4

UP DN

EMU01331

Power Trim/Tilt Switch

UP DN

701034*

701035

The power trim/tilt adjusts the motor angle in relation to the transom. The power trim/tilt switch is located on the remote control lever grip. Pushing the switch “UP” trims the motor up, then tilts the motor up. Pressing the switch “DN” tilts the motor down and trims the motor down. When the switch button is released, the motor will stop in its current position.

NOTE:

Refer to the sections “ADJUSTING TRIM ANGLE” and “TILTING UP/DOWN” in Chapter 3 for instructions on usage.

EMU01155

Throttle Friction Adjusting Screw

A friction device in the remote control box provides adjustable resistance to movement of the remote control lever, and can be set according to operator preference. An adjusting screw is located on the front of the remote control box.

Resistance Screw

Increase Turn clockwise

Decrease Turn counterclockwise

Do not overtighten the friction adjusting screw. If there is too much resistance, it may be difficult to move the lever, which could result in an accident.

2-5

603014

EMU00113

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.

An improperly adjusted trim tab may cause difficult steering. Always test run after the trim tab has been installed or replaced to be sure steering is correct. Be

F1010

sure you have tightened the bolt after adjusting the trim tab.

1 Trim tab 2 Bolt 3 Cap (If equipped)

Boat tends to veer The fin of trim tab

To the left Turn to the left

(port side) (A in the figure)

To the right Turn to the right

(starboard side) (B in the figure)

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.

2-6

F1006*

EMU01125

POWER TRIM/TILT SWITCH

The power trim/tilt adjusts the motor angle in relation to the transom. The power trim/tilt switch is located on the side of the bottom engine cowling. Pushing the switch “UP” trims the motor up, then tilts the motor up. Pressing the switch “DN” tilts the motor down and trims the motor down. When the switch button is released, the motor will stop in its current position.

Use the power trim/tilt switch located on the bottom engine cowling only when the boat is at a complete stop with the engine off. Attempting to use the cowling-mounted power trim/tilt 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 obstacle.

NOTE:

Refer to the section “Adjusting Trim Angle” and “Tilting Up/Down” for instructions on usage.

2-7

001081

001085

EMU01617

DIGITAL TACHOMETER

This gauge contains the tachometer, trim meter, hour meter, low oil pressure warning indicator, and the overheat warning indicator.

1 Tachometer 2 Trim meter 3 Hour meter 4 Low oil pressure warning indicator 5 Overheat warning indicator 6 Set button 7 Mode button

NOTE:

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

EMU00136

Tachometer

This meter shows the engine speed.

001058

2-8

001059

001088

EMU01109

Trim Meter

This meter shows the trim angle of your outboard motor.

NOTE:

8 Memorize the trim angles that work

best for your boat under different conditions. Adjust the trim angle to the desired setting by operating the power trim and tilt switch.

8 If the trim angle of your motor exceeds

the trim operating range, the top segment on the trim meter display will start to blink.

EMU01620

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. 8 Changing the display format

Pressing the MODE button changes the display format in the following circular pattern: Total hours - Trip hours - Display off

8 Resetting the trip hours

Simultaneously pressing the SET and MODE buttons for more than 1 second while the trip hours are displayed resets the trip counter to 0 (zero).

NOTE:

The total number of hours the engine has been run cannot be reset.

2-9

001060

EMU01110

Low Oil Pressure Warning Indicator

If oil pressure drops too low, the warning indicator will start to blink. Refer to the section “LOW OIL PRESSURE WARNING” for details.

1 Low oil pressure warning indicator

8 Do not operate the engine without oil.

Serious engine damage will occur.

8 The low oil pressure warning indicator

does not indicate the oil level in the engine. Use the Oil Level Gauge to check the remaining oil quantity. (Refer to the section “CHECKING THE ENGINE OIL LEVEL” for details.)

EMU01553

Overheat Warning Indicator

If the engine temperature rises too high, the warning indicator will start to blink. Refer to “OVERHEAT WARNING” for details.

1 Overheat warning indicator

001061

Do not continue to operate the engine if a warning device has activated. If necessary, refer to the “TROUBLESHOOTING” section in this manual. Consult your dealer if the problem cannot be located and corrected.

2-10

F1008A

F1009

000365

EMU00157

TILT SUPPORT LEVER

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

EMU00163

TOP COWLING LOCK LEVERS

To remove the engine top cowling, pull up the front and rear lock levers. Then lift off the cowling. When replacing the cowling, check to be sure it fits properly in the rubber seal. Then lock the cowling again by moving the levers downward.

F1008B

EMU01146

FLUSHING DEVICE

This device 1 is used to clean the cooling water passages of the motor using a garden hose and tap water.

NOTE:

Refer to “Cleaning Cooling-water Passages” in Chapter 4 for instructions on usage.

2-11

605015

001095

EMU00169*

WARNING SYSTEM

Do not continue to operate the engine if the warning device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected.

EMU01017

OVERHEAT WARNING

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

(1); Included (—); N/A

Activation of Tiller Remote warning device control control

model modell

The engine speed will automatically decrease to about 3,000 r/min.

The overheat warning indicator will come on.

The buzzer will sound.

If the warning system has been activated, stop the engine and check the water inlet for clogging.

2-12

001097

EMU01018

LOW OIL PRESSURE WARNING

If oil pressure drops too low, the warning device will activate.

(1):Included (—):N/A

Activation of Tiller Remote warning device control control

model model

Engine speed will automatically decrease to about 3,000 r/min.

The low oil pressure warning indicator will come on.

The buzzer will sound.

If the warning system has been activated, stop the engine as soon as it is safe to do so. Check oil level and add oil as needed. If the oil level is correct, consult your Yamaha dealer.

Do not continue to run the engine if the low oil pressure lamp is “ON”. Serious engine damage may occur.

2-13

EMU00174

Chapter 3

OPERATION

INSTALLATION ........................................3-1

Mounting the outboard motor............3-2

Filling fuel..............................................3-4

PRE-OPERATION CHECKS ......................3-5

Checking the engine oil level ..............3-6

BREAKING IN (RUNNING IN) ENGINE ..3-7

STARTING ENGINE .................................3-8

WARMING UP ENGINE .........................3-11

SHIFTING ................................................3-12

Forward ...............................................3-12

Reverse................................................3-12

STOPPING ENGINE ...............................3-13

TRIMMING OUTBOARD MOTOR.........3-14

Adjusting trim angle ..........................3-15

TILTING UP/DOWN ...............................3-17

CRUISING IN OTHER CONDITIONS.....3-19

Cruising in salt water .........................3-19

000898

EMU00175

INSTALLATION

Incorrect engine height or obstructions to smooth water flow (such as the design or condition of the boat or accessories such as transom ladders/depth finder transducers) can create airborne water spray while the boat is cruising. Severe engine damage may result if the motor is operated continuously in the presence of airborne water spray.

NOTE:

During water testing check the buoyancy of the boat, at rest, with its maximum load. Check that the static water level on the exhaust housing is low enough to prevent water entry into the powerhead, when water rises due to waves when the outboard is not running.

3-1

104011*

EMU00176

MOUNTING THE OUTBOARD MOTOR

Improper mounting of the outboard motor could result in hazardous conditions such as poor handling, loss of control, or fire hazards. Observe the following: 8 The information presented in this sec-

tion is intended as reference only. It is not possible to provide complete instructions for every possible boat/motor combination. Proper mounting depends in part on experience and the specific boat/motor combination.

8 Your dealer or other person experi-

enced in proper rigging should mount the motor. If you are mounting the motor yourself, you should be trained by an experienced person. [permanent mounted type]

8 Your dealer or other person experi-

enced in proper outboard motor mounting should show you how to mount your motor. [portable type]

Mount the outboard motor on the center line (keel line) of the boat, and ensure that the boat itself is well balanced. Otherwise, the boat will be hard to steer. For boats without a keel or which are asymmetrical, consult your dealer.

1 Center line (keel line)

3-2

104014

Overpowering a boat may cause severe instability. Do not install an outboard motor with more horsepower than the maximum rating on the capacity plate of the boat. If the boat does not have a capacity plate, consult the boat manufacturer.

EMU01299

Mounting Height

To run your boat at optimum efficiency, the water-resistance (drag) of the boat and outboard motor must be made as little as possible. The mounting-height of the outboard motor greatly affects the water-resistance. If the mounting-height is too high, cavitation tends to occur, thus reducing the propulsion; and if the propeller tips cut the air, the engine speed will rise abnormally and cause the engine to overheat. If the mounting-height is too low, the water-resistance will increase and thereby reduce engine efficiency. Mount the engine so that the anti-cavitation plate is in alignment with the bottom of the boat .

NOTE:

8 The optimum mounting height of the

outboard motor is affected by the boat/motor combination. Test runs at different heights can help determine the optimum mounting height.

8 Refer to the section “TRIMMING OUT-

BOARD MOTOR” for instructions on setting the trim angle of the outboard.

3-3

EMU00187*

FILLING FUEL

1) Remove the fuel tank cap.

2) Fill the fuel tank carefully.

3) Close the cap securely after refueling.

Wipe up any spilled fuel.

EMU00189*

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 concerns about pollution and resulting emissions regulations. One of the most obvious changes has been the elimination of lead from most fuels.

As gasoline has changed, the amount of additives such as aromatics and oxygenates has increased. These additives are important 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 deposits collect, piston rings begin sticking. Performance drops and engine wear increases dramatically.

While many additives available may reduce deposits, Yamaha recommends the use of Ring Free Fuel Additive, available from your Yamaha dealer. Ring Free has repeatedly proven its ability to clean combustion deposits from inside the engine, notably the critical piston-ringland area, and fuel system components. Follow product labeling for use instructions.

3-4

EMU00204

PRE-OPERATION CHECKS

If any item in the pre-operation check is not working properly, have it inspected and repaired before operating the outboard motor. Otherwise, an accident could occur.

Do not start the engine out of water. Overheating and serious engine damage can occur.

EMU00206

Fuel

8 Check to be sure you have plenty of fuel

for your trip.

8 Make sure there are no fuel leaks or

gasoline fumes.

8 Check fuel line connections to be sure

they are tight.

8 Be sure the fuel tank is positioned on a

secure, flat surface, and that the fuel hose is not twisted or flattened, or likely to contact sharp objectss

EMU00208

Oil

8 Check the level of the oil in the sump

with the dipstick. If necessary, add oil to bring the level up to the upper mark.

3-5

000822

EMU00209

Controls

8 Check throttle, shift, and steering for

proper operation before starting the engine.

8 The controls should work smoothly,

without binding or unusual free play.

8 Look for loose or damaged connec-

tions.

8 Check operation of the starter and stop

switches when the outboard motor is in the water.

EMU00210

Engine

8 Check the engine and engine mounting. 8 Look for loose or damaged fasteners. 8 Check the propeller for damage.

EMU01436

CHECKING THE ENGINE OIL LEVEL

1) Put the outboard motor in an upright

position (not tilted).

2) Pull out the oil dipstick and wipe it

clean.

3) Completely re-insert the dipstick and

pull out it again.

4) Check the oil level using the dipstick

to be sure the level falls between the upper and lower marks. Fill with oil if it is below the lower mark, or drain to the specified level if it is above the upper mark.

1 Oil dipstick 2 Lower level mark 3 Upper level mark

201012

3-6

EMU00224

BREAKING IN (RUNNING IN)

ENGINE

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

Failure to follow the break-in (running-in) procedure may result in reduced engine life or even severe engine damage.

Break-in (running-in) time: 10 hours

EMU00233

Run the engine under load (in gear with a propeller installed) as follows.

1) For the first hour of operation: Run the engine at 2,000 r/min or at approximately half throttle.

2) For the second hour of operation: Run the engine at 3,000 r/min or at approximately three-quarter throttle, and during this period run it at full throttle for approximately one minute every ten minutes.

3) For the next eight hours of operation: Avoid continuous operation at full throttle for more than five minutes at a time.

4) After these first 10 hours: Operate the engine normally.

3-7

902025

EMU01197

STARTING ENGINE

8 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.

8 When the air vent screw is loosened,

gasoline (petrol) vapor will be released. Gasoline (petrol) is highly flammable, and its vapors are flammable and explosive. Refrain from smoking, and keep away from open flames and sparks while loosening the air vent screw.

8 This product emits exhaust gases

which contain carbon monoxide, a colorless, odorless gas which may cause brain damage or death when inhaled. Symptoms include nausea, dizziness, and drowsiness. Keep cockpit and cabin 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 bulb with the out-

let end up until you feel it become firm.

3-8

701015

000293

EMU00247*

PROCEDURE FOR REMOTE CONTROL MODEL

4) Place the remote control lever in the Neutral position.

NOTE:

The start-in-gear protection device prevents the engine from starting except when in Neutral.

5) Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg. Then, install the lock plate on the other end of the lanyard in the engine stop switch.

8 Attach the engine stop switch lanyard

to a secure place on your clothing, your arm or leg while operating.

8 Do not attach the lanyard to clothing

that could tear loose. Do not route the lanyard where it could become entangled, preventing from functioning.

8 Avoid accidentally pulling the lanyard

6) Turn the main switch to “ON”.

STARTOFF

NOTE:

When the main switch is first turned on, all warning lamps flash for a few seconds. If a light does not flash, replace the bulb.

701045

3-9

OFF

START

701022

EMU00949

Electric Start Model

7) Turn the main switch to “START”,

and hold it for a maximum of 5 seconds.

8) Immediately after the engine starts,

release the main switch to return it to “ON”.

8 Do not turn the main switch to

“START” when the engine is running.

8 Do not keep the starter-motor turning

for more than 5 seconds. The battery will rapidly become exhausted and it will be impossible for it to start the engine. If the engine does not start within 5 seconds, return the main switch to “ON”, wait 10 seconds, and then crank the engine again.

3-10

F1012

EMU00258

WARMING UP ENGINE

1) Before beginning operation, allow the engine to warm up at idling speed for 3 minutes. (Failure to do this will shorten engine life.)

2) Be sure the low oil pressure warning indicator goes off after starting the engine.

3) Check for a steady flow of water from the cooling-water pilot hole.

8 If the low oil pressure indicator does

not go off after the engine starts, stop the engine. Otherwise, serious engine damage could occur. Check the oil level and add oil if necessary. If the cause for the low oil pressure warning indicator cannot be found, consult your Yamaha dealer.

8 A continuous flow of water from the

pilot hole shows that the water pump is pumping water through the cooling passages. If water is not flowing out of the pilot hole at all times while the engine is running, do not continue to run the engine. Overheating and serious damage could occur. Stop the engine and check to see if the water inlet on the lower casing is blocked. If the problem cannot be found and corrected, consult your Yamaha dealer.

3-11

701034**

UP DN

701034**

UP DN

EMU00261

SHIFTING

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

701043

To change the shifting position from forward to reverse or vice-versa, close the throttle first so that the engine idles (or runs at low speeds).

EMU00264

FORWARD

Pull up the neutral interlock trigger (If equipped) and move the remote control lever quickly and firmly from Neutral to Forward.

EMU00269

REVERSE

When operating in Reverse, go slowly. Do not open the throttle more than half. Otherwise, the boat may become unstable, which could result in loss of control and an accident.

Pull up the neutral interlock trigger (If

equipped) and move the remote control lever quickly and firmly from Neutral to Reverse.

701044

3-12

START

OFF

701023

EMU00273

STOPPING ENGINE

Let it cool off for a few minutes at idle or low speed first. Stopping the engine immediately after operating at high speed is not recommended.

EMU00276

1) Turn the main switch to “OFF”.

2) If the fuel joints are provided, disconnect the fuel line from the motor after stopping the engine.

3) Tighten the air vent screw on the fuel tank cap after stopping the engine, if it is equipped.

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

NOTE:

The engine can also be stopped by pulling the lanyard and removing the lock plate from the engine stop lanyard switch (then turning the main switch to “OFF”).

3-13

000839

EMU01412

TRIMMING OUTBOARD

MOTOR

The trim angle of the outboard motor helps determine the position of the bow of the boat in the water. The correct trim angle will help improve performance and fuel economy while reducing strain on the engine. The 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.

Excessive trim for the operating conditions (either trim up or trim down) can cause boat instability and can make steering the boat more difficult. This increases 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.

NOTE:

Refer to the section “ADJUSTING TRIM ANGLE” for instructions on usage.

1 Trim operating angle

3-14

UP DN

701034*

ADJUSTING TRIM ANGLE

EMU01401

Power Trim/Tilt Model

8 Be sure all people are clear of the out-

board motor when adjusting the trim/tilt angle, also be careful not to pinch any body parts between the drive unit and clamp bracket.

8 Use caution when trying a trim position

for the first time. Increase speed gradually and watch for any signs of instability or control problems.

8 Use the power trim/tilt switch located

on the bottom engine cowling (if equipped) only when the boat is at a complete stop with the engine off.

The outboard motor trim angle can be adjusted operating the power trim/tilt switch 1.

To raise the bow (“trim-out”), push the switch UP.

To lower the bow (“trim-in”), push the switch DN.

Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions.

NOTE:

To adjust the trim angle while the boat is moving, use the power trim and tilt switch located on the remote control device or tiller handle, if so equipped.

3-15

105011

EMU00282

Bow Up

When the boat is on plane, a bow-up attitude result in less drag, greater stability and efficiency. This is generally when the keel line of the boat is up about 3 to 5 degrees. When trimmed out, the boat may have more tendency to steer to one side or the other. Compensate for this as you steer. The trim tab can also be adjusted to help offset this effect.

Too much trim-out puts the bow of the boat too high in the water. Performance and economy are decreased because the hull of the boat is pushing the water and there is more air drag. Excessive trim-up can cause the propeller to ventilate, which reduces performance further. When trimmed-out too much, a boat may “porpoise” (hop in the water), which could throw the operator and passengers overboard.

EMU00283

Bow Down

When the bow of the boat is down, it is easier to accelerate from a standing start onto plane.

105013

105015

Too much trim-in causes the boat to “plow” through the water, decreasing fuel economy and making in hard to increase speed. Operating 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 operation difficult and dangerous.

1 Bow up 2 Bow down 3 Optimum angle

3-16

000837

EMU01200

TILTING UP/DOWN

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

Before tilting the motor, follow the procedures under “STOPPING ENGINE”. Never tilt the motor while the engine is running. Severe damage from overheating can result.

Be sure all people are clear of the outboard motor when adjusting the tilt angle, also be careful not to pinch any body parts between the drive unit and engine bracket.

Leaking fuel is a fire hazard. Disconnect the fuel line or close the fuel cock if the engine will be tilted for more than a few minutes. Otherwise, fuel may leak. (If the fuel connector is provided on the motor.)

3-17

F1006*

UP DN

EMU01029

PROCEDURE FOR TILTING UP

UP DN

701034*

Power trim/tilt model

1) Remove the fuel-line connection from

the motor. (If the fuel connector is provided on the motor.)

2 )Push the power trim/tilt switch “UP”

until the outboard has tilted up completely.

3) Turn the tilt-support lever toward

engine bracket and support the engine.

8 After tilting the engine, be sure to sup-

port it with the tilt-support lever. Otherwise, the engine could fall back down

F1009

suddenly if oil in the power trim/tilt unit should lose pressure.

8 Never operate the engine while it is

supported by the tilt-support lever.

3-18

F1015

EMU00303

PROCEDURE FOR TILTING DOWN

Power trim/tilt model

1) Push the power trim/tilt switch “UP” until the engine is supported by the tilt rod.

2) Release the tilt-support lever.

3) Push the power trim/tilt switch “DN” (Down) to lower the engine to the desired position.

EMU00316*

CRUISING IN OTHER

CONDITIONS

CRUISING IN SALT WATER

After operating in salt water, wash out the cooling-water passages with fresh water to prevent them from becoming cloggedup with salt deposits.

NOTE:

Refer to cooling system flushing instructions in “TRANSPORTING AND STORING OUTBOARD MOTOR”.

3-19

EMU00317

Chapter 4

MAINTENANCE

SPECIFICATIONS .....................................4-1

TRANSPORTING AND STORING

OUTBOARD MOTOR ...............................4-3

Trailering outboard motor...................4-3

Storing outboard motor ......................4-4

PERIODIC MAINTENANCE......................4-8

Replacement parts ...............................4-8

Maintenance chart................................4-9

Greasing ..............................................4-10

Cleaning and adjusting spark plug...4-11

Checking fuel system.........................4-13

Inspecting fuel filter ...........................4-14

Adjusting idling speed.......................4-16

Changing engine oil...........................4-17

Checking timing belt ..........................4-19

Replacing fuse ....................................4-20

Checking wiring and connectors ......4-21

Exhaust leakage..................................4-21

Water leakage .....................................4-21

Checking power trim and tilt system

..................................................4-22

Checking propeller .............................4-23

Changing gear oil ...............................4-25

Inspecting and replacing anodes......4-26

Checking battery.................................4-27

Checking bolts and nuts ....................4-30

Cleaning cooling-water passages.....4-30

Motor exterior.....................................4-31

Coating the boat bottom ...................4-32

EMU00322*

SPECIFICATIONS

Model

Item

DIMENSIONS

8Overall Length 8Overall Width 8Overall Height L/X 8Transom height L/X 8Weight * L/X

PERFORMANCE

8Full throttle operating range 8Maximum output 8Idling speed (Neutral)

ENGINE 8Type

Displacement Bore × stroke

8Ignition system 8Spark plug 8Spark plug gap 8Control system 8Starting system

Valve clearance (cold engine) IN

8Battery

Min. cold cranking amps (CCA/SAE) Min. marine cranking amps (MCA/ABYC) Min. reserve capacity (RC/SAE)

8Alternator output 8Starting carburetion system

DRIVE UNIT

8Gear positions

Gear ratio

8Trim/tilt system 8Propeller mark

FUEL AND OIL

8Recommended fuel

Fuel tank capacity

8Recommended engine oil

Engine oil capacity (without oil filter)

8Recommended gear oil

Gear oil capacity

TIGHTENING TORQUE

8Spark plug 8Propeller nut 8Engine oil drain bolt 8Engine oil filter

(with oil filter)

* Listed weight does not include propeller.

kW (HP) @ r/min

amps at -18°C (-0.4°F)

amps at 0°C (32°F)

l(US gal, Imp gal)

l(US qt, Imp qt) l(US qt, Imp qt)

N•m(kgf•m,lb•ft) N•m(kgf•m,lb•ft) N•m(kgf•m,lb•ft) N•m(kgf•m,lb•ft)

Unit F75TRB

mm (in.) mm (in.) mm (in.) mm (in.)

kg (lb.)

r/min

(cu.in.)

mm (in.)

NGK

mm (in.)

mm (in.) mm (in.)

minutes

V-A(W)

P.O.N.

API

SAE

(US oz, Imp oz)

817 (32.2) 479 (18.9) 1,582 (62.3) / — 536 (21.1 ) / — 168 (370) / —

5,000 ~ 6,000

55.2 (75.0)@5,500 800 ~ 900

4-stroke, DOHC, L4 1,596 (97.39)

79.0 × 81.4 (3.11 × 3.20) CDI system LFR5A-11

1.1 (0.043) Remote control Electric start

0.17 ~ 0.23 (0.007 ~ 0.009)

0.31 ~ 0.37 (0.012 ~ 0.015)

380 502 124 12-20 Prime start

Forward-Neutral-Reverse

2.31 (30 / 13) Power trim & tilt K

Regular unleaded gasoline (Minimum 86)

4-stroke motor oil SE,SF,SG,SH,SJ 10W-30, 10W-40

4.5 (4.8, 4.0)

4.7 (5.0, 4.1) Hypoid gear oil (SAE90) 670 (22.64, 23.58)

25 (2.5, 18) 35 (3.5, 25) 27 (2.7, 20) 18 (1.8, 13)

4-1

F80TRB F90TRB —

817 (32.2) 479 (18.9) 1,582 (62.3) / 1,710 (67.3) 536 (21.1 ) / 664 (26.1) 170 (375) / 174 (384)

5,000 ~ 6,000

58.8 (80.0)@5,500 800 ~ 900

4-stroke, DOHC, L4 1,596 (97.39)

79.0 × 81.4 (3.11 × 3.20) CDI system LFR5A-11

1.1 (0.043) Remote control Electric start

0.17 ~ 0.23 (0.007 ~ 0.009)

0.31 ~ 0.37 (0.012 ~ 0.015)

380 502 124 12-20 Prime start

Forward-Neutral-Reverse

2.31 (30 / 13) Power trim & tilt K

817 (32.2) 479 (18.9) 1,582 (62.3) / 1,710 (67.3) 536 (21.1 ) / 664 (26.1) 168 (370) / 172 (379)

5,000 ~ 6,000

66.2 (90.0)@5,500 800 ~ 900

4-stroke, DOHC, L4 1,596 (97.39)

79.0 × 81.4 (3.11 × 3.20) CDI system LFR5A-11

1.1 (0.043) Remote control Electric start

0.17 ~ 0.23 (0.007 ~ 0.009)

0.31 ~ 0.37 (0.012 ~ 0.015)

380 502 124 12-20 Prime start

Forward-Neutral-Reverse

2.31 (30 / 13) Power trim & tilt K

Regular unleaded gasoline (Minimum 86)

4-stroke motor oil SE,SF,SG,SH,SJ 10W-30, 10W-40

4.5 (4.8, 4.0)

4.7 (5.0, 4.1) Hypoid gear oil (SAE90) 670 (22.64, 23.58)

25 (2.5, 18) 35 (3.5, 25) 27 (2.7, 20) 18 (1.8, 13)

Regular unleaded gasoline (Minimum 86)

4-stroke motor oil SE,SF,SG,SH,SJ 10W-30, 10W-40

4.5 (4.8, 4.0)

4.7 (5.0, 4.1) Hypoid gear oil (SAE90) 670 (22.64, 23.58)

25 (2.5, 18) 35 (3.5, 25) 27 (2.7, 20) 18 (1.8, 13)

4-2

EMU01369

TRANSPORTING AND

STORING OUTBOARD MOTOR

Leaking fuel is a fire hazard. When transporting and storing the outboard motor, close the air vent screw and fuel cock to prevent fuel from leaking.

EMU00326

TRAILERING OUTBOARD MOTOR

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

8 Never get under the lower unit while it

is tilted, even if a motor support bar is used. Severe injury could occur if the outboard accidentally falls.

8 USE CARE when transporting fuel tank,

whether in a boat or car. DO NOT fill fuel container to maximum capacity. Gasoline will expand considerably as it warms up and can build up pressure in the fuel container. This can cause fuel leakage and a potential fire hazard.

Do not use the tilt support lever/knob when trailering the boat. The outboard motor could shake loose from the tilt support and fall. If the motor can not be trailered in the down position, use an additional support device to secure it in the up position.

4-3E4-4

EMU00330*

000898

STORING OUTBOARD MOTOR

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

8 To prevent problems which can be

caused by oil entering the cylinder from the sump, keep the engine in the vertical position when transporting and storing it. If storing or transporting the outboard motor in a horizontal position, put it on a cushion after draining the engine oil.

8 Do not place the engine on its side

before the cooling water has drained from it completely, or water may enter the cylinder through the exhaust port and cause problems.

8 Store the engine in a dry, well-ventilat-

ed place, not in direct sunlight.

605014

903021*

EMU00338*

Flushing Cooling System and Fogging Engine

Cooling system flushing is essential to prevent the cooling system from clogging up with salt, sand, or dirt. In addition, fogging of the engine is mandatory to prevent expensive engine damage due to rust. Perform the flushing and fogging at the same time.

8 Do not touch or remove electrical parts

when starting or during operation.

8 Keep hands, hair and clothes away

from flywheel and other rotating parts while engine is running.

EMU00342

8 Flushing with the Flushing Attachment

Avoid running the outboard at high speed while on the flushing attachment, or overheating could occur.

1) Remove the top cowling and the propeller.

2) Install a flushing attachment 1 to the cooling water inlet.

3) Run the engine at a fast idle for 10~15 minutes supplying fresh water.

4) Just prior to turning off the engine, quickly spray “Yamaha Stor-Rite Engine Fogging Oil” (Part No. LUBSTRRT-12-00) alternately into the silencer cover. When properly done, the engine will smoke excessively and almost stall.

5) Remove the flushing attachment and wipe off any excess water.

6) Install the top cowling and the propeller.

4-5

NOTE:

A flushing attachment is available from a Yamaha dealer.

EMU00349

Lubrication

1) Remove the spark plug(s). Spray a

Yamaha “Stor-Rite Engine Fogging Oil” into each cylinder for 10 seconds. Grease the spark plug threads and reinstall the spark plug(s) and torque to proper specification. (Refer to the “CLEANING AND ADJUSTING SPARK PLUG”).

2) Turn the engine over with the stop

lanyard disconnected to work the fogging oil into the piston rings.

3) Change the gear-case oil. (Refer to

“CHANGING GEAR OIL”). Inspect the oil for the presence of water which indicates a leaky seal. Seal replacement should be performed by an authorized Yamaha dealership prior to use.

4) Grease all grease fittings. (Refer to

the “GREASING”)

EMU00351

Cleaning and Anti-corrosion Measure

1) Wash down the exterior of the out-

board with fresh water and dry off completely.

2) Spray the engine’s exterior with

“Yamaha Silicone Protectant” (Part No. LUB-SILCNE-13-00).

3) Wax the cowling with a non-abrasive

wax such as “Yamaha Silicone Wax” (Part No. ACC-11000-15-02).

4-6

EMU00353

Battery Care

Battery electrolyte is poisonous and dangerous, causing severe burns, etc. It contains sulfuric acid. Avoid contact with skin, eyes, or clothing. Antidote: EXTERNAL; Flush with water. INTERNAL; Drink large quantities of water or milk. Follow with milk of magnesia, beaten egg, or vegetable oil. Call physician immediately. EYES; Flush with water for 15 minutes and get prompt medical attention. Batteries produce explosive gases: Keep sparks, flame, cigarettes, etc. away. Ventilate when charging or using in a closed space. Always wear eye protection when working near batteries. KEEP OUT OF REACH OF CHILDREN.

Batteries vary among manufacturers. Therefore the following procedures may not always apply. Consult your battery manufacturer’s instructions.

1) Disconnect and remove the battery from the boat. Always disconnect the black negative lead first to prevent the risk of shorting.

2) Clean the battery casing and terminals. Fill each cell to the upper level with distilled water.

3) Store the battery on a level surface in a cool, dry, well-ventilated place out of direct sunlight.

4) Once a month, check the specific gravity of the electrolyte and recharge as required to prolong battery life.

4-7

EMU00913

PERIODIC MAINTENANCE

Be sure to turn off the engine when you perform maintenance unless otherwise specified. If the owner is not familiar with machine servicing, this work should be done by a Yamaha dealer or other qualified mechanic.

Maintenance, replacement, or repair of the emission control devices and systems 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 a Yamaha dealer for owners who have the mechanical skills, tools, and other equipment necessary to perform maintenance not covered by this owner’s manual.

EMU00356

REPLACEMENT PARTS

If replacement parts are necessary, use only genuine Yamaha parts or equivalents of the same type and of equivalent strength and materials. Any part of inferior quality may malfunction, and the resulting loss of control could endanger the operator and passengers. Yamaha genuine parts and accessories are available from a Yamaha dealer.

4-8

EMU00361

MAINTENANCE CHART

Frequency of maintenance operations may be adjusted according to the operating conditions, but the following table gives general guidelines.

The mark (7) indicates the check-ups which you may carry out yourself. The mark (2) indicates work to be carried out by your Yamaha dealer.

Interval

Item

Spark plug(s)

Greasing points Greasing ● 4-10

Gear oil Change ●●4-25

Fuel system Inspection 1 4-13

Fuel filter

Fuel tank*1 Cleaning ● —

Idling speed

Anode(s)

Outboard motor exterior Inspection ● 4-31

Cooling water passages*2

Propeller Inspection ● 4-23

Timing belt*3

Battery Inspection/Charge ● 1 4-27

Ignition timing Inspection 11—

Bolts/Nuts*4 Retightening 114-30

Engine oil Change ●●4-17

Oil filter Change 1 —

Valve clearance*5

Thermostat Inspection 1 —

Cleaning/Adjustment/

Replacement

Inspection/Replacement

Inspection/Adjustment

Inspection/Replacement

Flushing ● 4-5

Inspection/Replacement

Inspection/Adjustment

Initial Every

10 hours

50 hours

(3 months)

●●4-11

●●4-14

●●4-16

1 : every 400 hours (2 years) —

100 hours

(6 months)

200 hours

(1 year)

1 4-26

1 4-19

Refer

page

*1. If a portable fuel tank is equipped. *2. The engine should be flushed with fresh water after operaing in salt, turbid or muddy water. *3. Be sure replace the timing belt after every 1,000 hours or 5 years (whichever comes first) of

operation. *4. Except for the cylinder head bolts and crankcase journal bolts. *5. If leaded gasoline is usually used, engine valves and related parts should be inspected after

every 300 hours of operation in addition to the items on the maintenance chart above.

4-9

EMU00366

F1017

GREASING

Yamaha marine grease (Water resistant grease)

4-10

EMU01035

CLEANING AND ADJUSTING SPARK PLUG

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

The spark plug is an important engine component and is easy to inspect. The condition of the spark plug can indicate something about the condition of the engine. For example, 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 remove and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode. If electrode erosion becomes excessive, or if carbon and other deposits are excessive, you should replace the spark plug with another of the correct type.

Standard spark plug: Refer to “SPECIFICATIONS”, page 4-1.

Before fitting the spark plug, measure the electrode gap with a wire thickness gauge; adjust the gap to specification if necessary.

Spark plug gap: Refer to “SPECIFICATIONS”, page 4-1.

4-11

When fitting the plug, always clean the gasket surface and use a new gasket. Wipe off any dirt from the threads and screw in the spark plug to the correct torque.

Spark plug torque: Refer to “SPECIFICATIONS”, page 4-1.

NOTE:

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 finger-tight. Have the spark plug adjusted to the correct torque as soon as possible with a torque-wrench.

Initial of spark Plug wrench size plug I.D. mark

B 21 mm (13/16 in.)

C, L 16 mm (5/8 in.)

D 18.3 mm (23/32 in.)

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

903022

4-12

F1018

EMU00369

CHECKING FUEL SYSTEM

Gasoline (petrol) and its vapors are highly flammable and explosive. Keep away from sparks, cigarettes, flames or other sources of ignition.

Check the fuel line for leaks, cracks, or malfunctions. If any problem is found, it should be repaired immediately by Yamaha dealer or other qualified mechanic.

Checking points

8 Fuel system parts leakage. 8 Fuel hose joint leakage. 8 Fuel hose cracks or other damage. 8 Fuel connector leakage.

Leaking fuel can result in fire or explosion.

8 Check for fuel leakage regularly. 8 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.

4-13

EMU00370

INSPECTING FUEL FILTER

Gasoline (petrol) is highly flammable, and its vapors are flammable and explosive. 8 If you have any question about properly

doing this procedure, consult your Yamaha dealer.

8 Do not perform this procedure on a hot

or running engine. Allow the engine to cool.

8 There will be fuel in the fuel filter. Keep

away from sparks, cigarettes, flames or other sources of ignition.

8 This procedure will allow some fuel to

spill. Catch fuel in a rag. Wipe up any spilled fuel immediately.

8 The fuel filter must be reassembled

carefully with O-ring, filter cup, and hoses in place. Improper assembly or replacement can result in a fuel leak, which could result in a fire or explosion hazard.

4-14

000137

w e

000138

EMU01577

NOTE:

If any water is in the fuel, the float 5 will rise. If so, remove the cup and drain the water.

1) Remove the nut holding the fuel filter assembly if so equipped.

2) Unscrew the filter cup 1, catching any spilled fuel in a rag.

3) Remove the filter element 2, and wash it in solvent. Allow it to dry. Inspect the filter element and O-ring 3 to make sure they are in good condition. Replace them if necessary.

4) Reinsert the float in the filter cup, making sure the indentations in the float ring match the ribs inside the filter cup. Reinstall the filter element in the cup. Make sure the O-ring is in proper position in the cup. Firmly screw the cup onto the filter housing

5) Attach the filter assembly to the bracket.

6) Run the engine and check the filter and lines for leaks.

4-15

F1045

EMU00991

ADJUSTING IDLING SPEED

8 Do not touch or remove electrical parts

when starting or during operation.

8 Keep hands, hair and clothes away

from flywheel and other rotating parts while engine is running.

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.

1) Start the engine and allow it to warm

up fully in Neutral until it is running smoothly. If the outboard is mounted on a boat, be sure the boat is tightly moored.

2) Adjust the throttle stop-screw 1 to

set the idling speed to specification (see “SPECIFICATIONS” on page 4-1) by turning the stop-screw clockwise to increase the idling speed, and turning it counterclockwise to decrease the idling speed.

NOTE:

Correct idling-speed adjustment is only possible if the engine is fully warmed-up. If not warmed up fully, the speed setting will tend to be too high. If you have difficulty obtaining the specified idle, consult a Yamaha dealer or other qualified mechanic.

4-16

000898

EMU01415

CHANGING ENGINE OIL

8 Avoid draining the engine oil immedi-

ately after stopping the engine. The oil is hot and should be handled with care to avoid burns.

8 Be sure the outboard is securely fas-

tened to the transom or a stable stand.

8 Change the engine oil after the first 10

hours of operation, and every 100 hours or at 6-month intervals thereafter. Otherwise, the engine will wear quickly.

8 Do not overfill the oil, and be sure the

engine is in an upright position (not tilted) when checking and changing the engine oil.

8 If the oil level is above the upper level

mark, drain until the level meets the specified capacity. Overfilling the oil may cause leakage or damage.

1) Put the outboard motor in an upright position (not tilted).

2) Prepare a suitable container which can hold a larger amount than the engine oil capacity. Loosen and remove the drain bolt 1 while holding the container under the drain hole. Let the oil drain completely. Wipe up any spilled oil immediately.

3) Put a new gasket on the drain bolt. Apply a light coat of oil to the gasket and reinstall the drain bolt.

Tightening torque: Refer to “SPECIFICATIONS”, page 4-1.

F1022

4-17

F1023

NOTE:

If a torque wrench is not available when you are installing the drain plug, finger tighten the bolt just until the gasket comes into contact with the surface of the drain hole. Then tighten 1/4 - 1/2 turn. Have the drain plug torqued to the correct value with a torque wrench as soon as possible.

4) Remove the oil filler cap 2. Add the

correct amount of oil through the filler hole. Reinstall the filler cap.

Engine oil grade/capacity: Refer to “SPECIFICATIONS”, page 4-1.

5) Start the engine and watch to make

sure the low oil pressure warning lamp turns off. Make sure that there are no oil leaks.

If the oil lamp does not turn off, or if there are oil leaks, stop the engine and find the cause. Continued operation with a problem could cause severe engine damage. If the problem cannot be found and corrected, consult your Yamaha dealer.

4-18

000815

F1024

6) Turn off the engine and wait 3 minutes. Recheck the oil level using the dipstick to be sure the level falls between the upper and lower marks. Fill with oil if it is below the lower mark, or drain to the specified level if it is above the upper mark.

7) Dispose of used oil according to local regulations.

NOTE:

8 For disposal of used oil consult your

Yamaha dealer.

8 The oil should be changed more often

when the engine is operated under adverse conditions such as extended trolling.

EMU00380*

CHECKING TIMING BELT

Inspect the timing-belt and replace it if any to the following signs is observed: 8 Cracks in the back of the belt or in the

base of belt teeth.

8 Excessive wear at the roots of cogs. 8 Rubber portion swollen by oil. 8 Belt surfaces roughened. 8 Signs of wear on edges or outer surface

of belt.

8 Stretching by 10 mm (0.39 in) or more

when the belt is pushed with a finger.

Consult your Yamaha dealer for replacing the timing-belt.

4-19

EMU01330

REPLACING FUSE

If a fuse has blown, remove the electrical cover, open the fuse holder and remove the fuse with a fuse puller. Replace it with a spare one of proper amperage.

Be sure to use the specified fuse. An incorrect fuse or a piece of wire may allow excessive current flow. This could cause electrical system damage and a fire hazard.

NOTE:

If the new fuse blows again immediately, consult a Yamaha dealer.

F1043

F1025E

1 Electrical cover 2 Fuse holder 3 Fuse (30A × 1, 20A × 1) 4 Spare fuse (30A, 20A) 5 Fuse puller

4-20

F1030

EMU00383

CHECKING WIRING AND CONNECTORS

1) Check that each grounding wire is properly secured.

2) Check that each connector is engaged securely.

EMU00384

EXHAUST LEAKAGE

Start the engine and check that no exhaust leaks from the joints between the exhaust cover, cylinder head and crank case.

EMU00385

WATER LEAKAGE

Start the engine and check that no water leaks from the joints between the exhaust cover, cylinder head and crank case.

4-21

F1040

EMU00992

CHECKING POWER TRIM AND TILT SYSTEM

8 Never get under the lower unit while it

is tilted, even when the tilt-support lever is locked. Severe injury could occur if the outboard accidentally falls.

8 Make sure no one is under the out-

board before performing this test.

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 remote control and engine bottom cowling (If equipped) to check that all switches work.

3) Tilt up the motor and check that the

trim and tilt rod 1 is pushed out completely.

4) Check that the trim and tilt rod is free

of corrosion or other flaws.

5) Operate the motor to trim and tilt

down. Check that the trim and tilt rod operates smoothly.

NOTE:

If any operation is abnormal, consult a Yamaha dealer.

Recommended fluid;

Yamaha power trim & tilt fluid or ATF (DEXRON-

4-22

II )

602051

F1042

F1026

EMU00388*

CHECKING PROPELLER

1) Remove the 5 screws and the cover.

2) Remove the spark plug caps from the spark plugs.

You could be seriously injured if the engine accidentally starts while you are near the propeller. 8 Before inspecting, removing or

installing the propeller, remove the spark plug caps from the spark plugs. Also, put the shift control in Neutral, put the main switch in the “OFF” position and remove the key, and remove the lanyard from the engine stop switch. Turn off the battery cut-off switch if your boat has one.

8 Do not use your hand to hold the pro-

peller when loosening or tightening the propeller nut. Put a wood block between the cavitation plate and the propeller to prevent the propeller from turning.

EMU00390

Propeller Checking Point

8 Check each of the propeller blades for

wear, erosion from cavitation or ventilation, or other damage.

8 Check the splines for wear and damage. 8 Check for fish line winding around the

propeller shaft.

8 Check the propeller shaft oil seal for

damage.

602036

4-23

001146

EMU00976

Removing the Propeller

1) Straighten the cotter-pin 1 and pull it

out using a pair of pliers.

2) Remove the propeller nut 2, washer

3 and spacer 4.

3) Remove the propeller 5 and thrust

washer 6.

EMU00397

Installing the Propeller

8 Be sure to install the thrust washer

before installing propeller, otherwise, lower case and propeller boss may be damaged.

8 Be sure to use a new cotter pin and

bend the ends over securely. Otherwise, the propeller could come off during operation and be lost.

1) Apply Yamaha Marine grease or Cor-

rosion resistant grease to the propeller-shaft.

2) Install the thrust washer and propeller

on the propeller-shaft.

3) Install the spacer and washer. Tighten

the propeller nut to the specified torque.

602053

Tightening torque: Refer to “SPECIFICATIONS” page 4-1.

4) Align the propeller nut with the pro-

peller shaft hole. Insert a new cotter pin in the hole and bend the cotter pin ends.

NOTE:

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

4-24

601015

000565

EMU01460

CHANGING GEAR OIL

8 Be sure the outboard is securely fas-

tened to the transom or a stable stand. You could be severely injured if the outboard falls on you.

8 Never get under the lower unit while it

is tilted, even when the tilt-support lever/knob is locked. Severe injury could occur if the outboard accidentally falls.

1) Tilt the outboard motor so that the oil drain plug is at the lowest point possible.

2) Place a suitable container under the gear-case.

3) Remove the oil drain plug 1.

NOTE:

The oil drain plug is magnetic. Remove all metal particles from the plug before reinstalling it.

4) Remove the oil level plug 2 to allow the oil to drain completely.

Inspect the used oil after it has 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.

NOTE:

For disposal of used oil consult your Yamaha dealer.

5) With the outboard motor in a vertical position, and using a flexible or pressurized filling device, inject the gear oil into the oil drain plug hole.

4-25

603024

Gear oil grade/capacity: Refer to “SPECIFICATIONS,” page 4-1.

6) When the oil begins to flow out of the

oil level plug hole, insert and tighten the oil level plug.

7) Insert and tighten the oil drain plug.

EMU00831*

INSPECTING AND REPLACING ANODE(S)

Yamaha outboard motor is protected from corrosion by a sacrificial anode(s). Check the anode(s) periodically. Remove the scales from surfaces of the anode(s). For the inspection and replacement of the anode(s), consult a Yamaha dealer.

Do not paint the anode(s), for this would render it ineffective

NOTE:

Remove the cover with anode after removing the bolts 1 when checking the anode condition.

F1027

F1028

4-26

EMU00404

CHECKING BATTERY (for Electric start model)

Battery electrolytic fluid is dangerous; it contains sulfuric acid and therefore is poisonous and highly caustic. Always follow these preventive measures: 8 Avoid bodily contact with electrolytic

fluid as it can cause severe burns or permanent eye injury.

8 Wear protective eye gear when han-

dling or working near batteries. Antidote (EXTERNAL):

8 SKIN - Flush with water. 8 EYES - Flush with water for 15 minutes

and get immediate medical attention. Antidote (INTERNAL):

8 Drink large quantities of water or milk

followed by milk of magnesia, beaten egg, or vegetable oil. Get immediate medical attention. Batteries also generate explosive hydrogen gas; therefore, you should always follow these preventive measures:

8 Charge batteries in a well-ventilated

area.

8 Keep batteries away from fire, sparks,

or open flames (e.g., welding equipment, lighted cigarettes, etc.).

8 DO NOT SMOKE when charging or han-

dling batteries.

8 KEEP BATTERIES AND ELECTROLYTIC

FLUID OUT OF REACH OF CHILDREN.

4-27

901015

UPPER LEVEL

LOWER LEVEL

8 A poorly maintained battery will quick-

ly deteriorate.

8 Ordinary tap-water contains minerals

harmful to a battery, and should not be used for topping-up.

1) Check the electrolyte level at least

once a month. Fill to the manufacturer’s recommended level when necessary. Top up only with distilled water (or pure de-ionized water suitable to use in batteries).

2) Keep the battery always in a good

state of charge. Installing a voltmeter will help you monitor your battery. If you will not use the boat for a month or more, remove the battery from the boat and store it in a cool, dark place. Completely recharge the battery before using it.

3) If the battery will be stored for longer

than a month, check the specific gravity of the fluid at least once a month and recharge the battery when it is low.

4-28

UPPER LEVEL

LOWER LEVEL

901012

EMU01279

Connecting the Battery

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

8 Make sure the main switch (on applica-

ble models) is “OFF” before working on the battery.

8 Reversal of the battery leads will dam-

age the rectifier.

8 Connect the RED lead first when

installing the battery and disconnect the RED lead last when removing it. Otherwise, the electrical system can be damaged.

8 The electrical contacts of the battery

and cables must be clean and properly connected, or the battery will not start the engine.

Connect the RED lead to the POSITIVE (+) terminal first. Then connect the BLACK lead to the NEGATIVE (-) terminal.

1 Red lead 2 Black lead 3 Battery

EMU01280

Disconnecting the Battery

Disconnect the BLACK lead from the NEGATIVE (-) terminal first. Then disconnect the RED lead from the POSITIVE (+) terminal.

4-29

000845

EMU00408*

CHECKING BOLTS AND NUTS

1) Check that bolts securing the engine

and the nut securing the flywheel are tightened with their specified tightening torque.

2) Check the tightening torque of other

bolts and nuts.

EMU01172

CLEANING COOLING-WATER PASSAGES

Flushing device equipped model

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

1) After shutting off the engine, unscrew

the garden-hose connector 2 from the fitting 1 on the bottom cowling.

2) Screw the garden-hose connector 2

onto a garden hose 3 which is connected to a fresh-water supply.

3) With the engine off, turn on the water

tap and let the water flush through the cooling passages for about 15 minutes. Turn off the water and disconnect the garden hose 3.

4) When flushing is complete, reinstall

the garden-hose connector 2 on the fitting 1 on the bottom cowling. Tighten the connector securely.

Do not leave the garden-hose connector loose on the bottom cowling 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 connector is tightened securely on the fitting after flushing the engine.

4-30

F1029

NOTE:

8 When flushing the engine with the boat

in the water, tilting up the engine until it is completely out of the water will achieve better results.

8 Refer to cooling system flushing

instructions in “TRANSPORTING AND STORING OUTBOARD MOTOR”.

EMU00409

MOTOR EXTERIOR

EMU00410

Cleaning the Outboard Motor

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

NOTE:

Refer to Flushing Cooling System instructions in “TRANSPORTING AND STORING OUTBOARD MOTOR”.

EMU00412

Checking Painted Surface of Motor

Check the motor for scratches, nicks, or flaking paint. Areas with damaged paint are more likely to corrode. If necessary, clean and paint the areas. A touch-up paint is available from a Yamaha dealer.

4-31

F1021*

EMU00413

COATING THE BOAT BOTTOM

A clean hull improves boat performance. The boat bottom should be kept as clean of marine growths as possible. If necessary, the boat bottom can be coated with an anti-fouling 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.

4-32

-MEMO-

EMN00010

Chapter 5

TROUBLE RECOVERY

TROUBLESHOOTING ..............................5-1

TEMPORARY ACTION IN

EMERGENCY ............................................5-5

Impact damage.....................................5-5

Power trim/tilt will not operate ...........5-5

Starter will not operate ........................5-6

Engine fails to operate .........................5-8

Treatment of submerged motor .........5-9

EMU01204¯

TROUBLESHOOTING

A problem in the fuel, compression, or ignition systems can cause poor starting, loss of power, or other problems. The troubleshooting chart describes basic checks and possible remedies. (This chart covers all Yamaha outboard motors. Therefore, some items may not apply to your model.) If your outboard motor requires repair, bring it to a Yamaha dealer.

Trouble Possible Cause Remedy

A. Starter will not

operate.

1. Battery capacity weak or low.

2. Battery connections loose or corroded.

3. Fuse for electric start circuit blown.

4. Starter components faulty.

5. Shift lever in gear.

1. Check battery condition. Use battery of recommended capacity.

2. Tighten battery cables and clean battery terminals.

3. Check for cause of electric overload and repair. Replace fuse with one of correct amperage.

4. Have serviced by a Yamaha dealer.

5. Shift to neutral.

B. Engine will not

start (Starter operates).

1. Fuel tank empty.

2. Fuel contaminated or stale.

3. Fuel filter clogged.

4. Starting procedure incorrect.

5. Fuel pump malfunctions.

6. Spark plug(s) fouled or incorrect type.

7. Spark plug cap(s) fitted incorrectly.

8. Poor connections or damaged ignition wiring.

9. Ignition parts faulty.

10. Engine stop switch lanyard not attached.

11. Engine inner parts damaged.

5-1

1. Fill tank with clean, fresh fuel.

2. Fill tank with clean, fresh fuel.

3. Clean or replace filter.

4. Read "STARTING ENGINE" section.

5. Have serviced by a Yamaha dealer.

6. Inspect spark plug(s). Clean or replace with recommended type.

7. Check and re-fit cap(s).

8. Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires.

9. Have serviced by a Yamaha dealer.

10. Attach lanyard.

11. Have serviced by a Yamaha dealer.

Trouble Possible Cause Remedy

C. Engine idles

irregularly or stalls.

1. Spark plug(s) fouled or incorrect type.

2. Fuel system obstructed.

3. Fuel contaminated or stale.

4. Fuel filter clogged.

5. Failed ignition parts.

6. Warning system activated.

7. Spark plug gap incorrect.

8. Poor connections or damaged ignition wiring.

9. Specified engine oil not used.

10. Thermostat faulty or clogged.

11. Carburetor adjustments incorrect.

12. Fuel pump damaged.

13. Air vent screw on the fuel tank closed.

14. Choke knob pulled out.

15. Motor angle too high.

16. Carburetor clogged.

17. Fuel joint connection incorrect.

18. Throttle valve adjustment incorrect.

19. Battery lead disconnected.

1. Inspect spark plug(s). Clean or replace with recommended type.

2. Check for pinched or kinked fuel line or other obstructions in fuel system.

3. Fill tank with clean, fresh fuel.

4. Clean or replace filter.

5. Have serviced by a Yamaha dealer.

6. Find and correct cause of warning.

7. Inspect and adjust as specified.

8. Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires.

9. Check and replace oil as specified.

10. Have serviced by a Yamaha dealer.

11. Have serviced by a Yamaha dealer.

12. Have serviced by a Yamaha dealer.

13. Open the air vent screw.

14. Return to home position.

15. Return to normal operating position.

16. Have serviced by a Yamaha dealer.

17. Connect correctly.

18. Have serviced by a Yamaha dealer.

19. Connect securely.

5-2

Trouble Possible Cause Remedy

1. Check water intake for restriction.

2. Fill oil tank with specified engine oil.

3. Inspect spark plug and replace it with recommended type.

4. Check and replace oil with specified type.

5. Replace oil with fresh, specified type.

6. Have serviced by a Yamaha dealer.

7. Have serviced by a Yamaha dealer.

8. Distribute load to place boat on an even plane.

9. Have serviced by a Yamaha dealer.

D. Warning buzzer

sounds or indicator lamp lights.

1. Cooling system clogged.

2. Engine oil level low.

3. Heat range of spark plug incorrect.

4. Specified engine oil not used.

5. Engine oil contaminated or deteriorated.

6. Oil filter clogged.

7. Oil feed/injection pump malfunctions.

8. Load on boat improperly distributed.

9. Water pump/thermostat faulty.

E. Engine power loss.

1. Propeller damaged.

2. Propeller pitch or diameter incorrect.

3. Trim angle incorrect.

4. Motor mounted at incorrect height on transom.

5. Warning system activated.

6. Boat bottom fouled with marine growth.

7. Spark plug(s) fouled or incorrect type.

8. Weeds or other foreign matter tangled on gear housing.

9. Fuel system obstructed.

10. Fuel filter clogged.

11. Fuel contaminated or stale.

12. Spark plug gap incorrect.

1. Have propeller repaired or replaced.

2. Install correct propeller to operate outboard at its recommended speed (r/min) range.

3. Adjust trim angle to achieve most efficient operation.

4. Have motor adjusted to proper transom height.

5. Find and correct cause of warning.

6. Clean boat bottom.

7. Inspect spark plug(s). Clean or replace with recommended type.

8. Remove foreign matter and clean lower unit.

9. Check for pinched or kinked fuel line or other obstructions in fuel system.

10. Clean or replace filter.

11. Fill tank with clean, fresh fuel.

12. Inspect and adjust as specified.

5-3

Trouble Possible Cause Remedy

E. Engine power loss.

F. Engine vibrates

excessively.

13. Poor connections or damaged ignition wiring.

14. Failed ignition parts.

15. Specified engine oil not used.

16. Thermostat faulty or clogged.

17. Air vent screw closed.

18. Fuel pump damaged.

19. Fuel joint connection incorrect.

20. Heat range of spark plug incorrect.

1. Propeller damaged.

2. Propeller shaft damaged.

3. Weeds or other foreign matter tangled on propeller.

4. Motor mounting bolt loose.

5. Steering pivot loose or damaged.

13. Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires.

14. Have serviced by a Yamaha dealer.

15. Check and replace oil with specified type.

16. Have serviced by a Yamaha dealer.

17. Open the air vent screw.

18. Have serviced by a Yamaha dealer.

19. Connect correctly.

20. Inspect spark plug and replace it with recommended type.

1. Have propeller repaired or replaced.

2. Have serviced by a Yamaha dealer.

3. Remove and clean propeller.

4. Tighten bolt.

5. Tighten or have serviced by a Yamaha dealer.

5-4

607011

F1032

EMU00416

TEMPORARY ACTION IN

EMERGENCY

EMU01492

IMPACT DAMAGE

The outboard motor can be seriously damaged by a collision while operating or trailering. Damage could make the outboard motor unsafe to operate.

If the outboard motor hits any object in the water, follow the procedure below.

1) Stop the engine immediately.

2) Inspect the control system and all components for damage. Also, inspect the boat for damage.

3) Whether damage is found or not, return to the nearest harbor slowly and carefully.

4) Have a Yamaha dealer inspect the outboard motor before operating it again.

EMU00419

POWER TRIM/TILT WILL NOT OPERATE

If the engine cannot be tilted up or down with the power trim and tilt because of a discharged battery or a failure with the power trim and tilt unit, the engine can be tilted manually.

1 Manual valve screw

EMU00421

1) Loosen the manual valve screw counterclockwise until it stops.

2) Put the engine in the desired position, then tighten the manual valve screw clockwise.

5-5

EMU00423

STARTER WILL NOT OPERATE

If the starter mechanism does not operate (engine cannot be cranked with the starter), the engine can be started with an emergency starter rope.

8 Use this procedure only in an emer-

gency and only to return to port for repairs.

8 When the emergency starter rope is

used to start the engine, the start-ingear protection device does not operate. Make sure the gear shift lever/ remote control lever is in neutral. Otherwise, the boat could unexpectedly start to move, which could result in an accident.

8 Be sure no one is standing behind you

when pulling the starter rope. It could whip behind you and injure someone.

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

8 Do not touch the ignition coil, high

voltage wire, spark plug cap or other electrical components when starting of operating the motor. You could be shocked.

5-6

F1008A

F1033

ON STARTOFF

701024

EMU00429*

Emergency Starting Engine

1) Remove the top cowling.

F1008B

2) Remove the two bolts holding the flywheel cover.

3) Lift up the rear of flywheel cover and pull it out forward.

4) Prepare the engine for starting. See “STARTING ENGINE” for procedures. Be sure the engine is in Neutral and that the lock plate is attached to the engine stop lanyard switch. The main switch must be “ON”.

5) Insert the knotted end of the emergency starter rope into the notch in the flywheel rotor and wind the rope clockwise.

6) Pull the rope slowly until resistance is felt.

7) Remove the rope from the flywheel temporarily.

8) Rewind the rope approximatery 3/4 of a turn clockwise.

9) Give a strong pull straight out to

F1034

crank and start the engine. Repeat if necessary.

5-7

Yamaha F90B, F80B, F75B User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

BASIC COMPONENTS

OPERATION

MAINTENANCE

TROUBLE RECOVERY