Yamaha F100 (2022), F80 (2022) User guide

OWNER’S MANUAL

Read this manual carefully before operating this

outboard motor.

F80
F100

6FP-28199-75-E0

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

Important manual information

TIP:

TIP:

EMU25108

To the owner

Thank you for selecting 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.

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

EWM00782

A WARNING indicates a hazardous situa­tion which, if not avoided, could result in
death or serious injury.

ECM00702

A NOTICE indicates special precautions
that must be taken to avoid damage to the
outboard motor or other property.

between your machine and this manual. If
there is any question concerning this manual,
please consult your Yamaha dealer.
To ensure long product life, Yamaha recom­mends that you use the product and perform
the specified periodic inspections and main­tenance by correctly following the instruc­tions in the owner’s manual. Any damage
resulting from neglect of these instructions is
not covered by warranty.
Some countries have laws or regulations re­stricting users from taking the product out of
the country where it was purchased, and it
may be impossible to register the product in
the destination country. Additionally, the war­ranty may not apply in certain regions. When
planning to take the product to another coun­try, consult the dealer where the product was
purchased for further information.
If the product was purchased used, please
consult your closest dealer for customer re­registration, and to be eligible for the speci­fied services.

The F80B, F100B and the standard accesso­ries are used as a base for the explanations
and illustrations in this manual. Therefore
some items may not apply to every model.

EMU25123

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

Yamaha continually seeks advancements 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

F80, F100

OWNER’S MANUAL

©2022 by Yamaha Motor Co., Ltd.

1st Edition, October 2021

All rights reserved.

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Co., Ltd.

is expressly prohibited.

Printed in Japan

Table of contents

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

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

Propeller............................................. 1

Rotating parts..................................... 1

Hot parts ............................................ 1

Electric shock..................................... 1

Power trim and tilt.............................. 1

Engine shut-off cord (lanyard)............ 1

Gasoline ............................................. 2

Gasoline exposure and spills ............. 2

Carbon monoxide .............................. 2

Modifications...................................... 2

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

Alcohol and drugs.............................. 2

Personal flotation devices (PFDs) ...... 2

People in the water ............................ 2

Passengers......................................... 2

Overloading........................................ 3

Avoid collisions .................................. 3

Collisions with floating or

submerged objects......................... 3

Weather.............................................. 4

Passenger training ............................. 4

Boating safety publications................ 4

Laws and regulations......................... 4

General information .......................... 5

Identification numbers record ......... 5

Outboard motor serial number........... 5

Key number........................................ 5

EC Declaration of Conformity

(DoC) ............................................ 5

CE Marking / UKCA Marking .......... 5

Compliance mark label ................... 6

Read manuals and labels ................ 7

Warning labels ................................... 7

Engine data recording ..................... 9

Specifications and requirements... 11

Specifications................................ 11

Installation requirements............... 12

Boat horsepower rating.................... 12

Mounting outboard motor................ 12

Remote control requirements ....... 12

Battery requirements .................... 12

Battery specifications....................... 12

Propeller selection ........................ 13

Start-in-gear protection ................ 13

Engine oil requirements ................ 13

Fuel requirements ......................... 14

Gasoline ........................................... 14

Muddy or acidic water .................. 15

Anti-fouling paint .......................... 15

Outboard motor disposal

requirements.............................. 15

Emergency equipment.................. 15

Emission control information ........ 15

Star labels ........................................ 16

Components .................................... 18

Components diagram ................... 18

Optional items .................................. 20

Fuel tank (portable fuel tank) ........... 20

Yamaha Security System

(Y-COP/Optional).......................... 21

Remote control box.......................... 21

Remote control lever........................ 22

Neutral interlock trigger.................... 22

Neutral throttle lever......................... 23

Free accelerator ............................... 23

Tiller handle ..................................... 23

Gear shift lever ................................ 24

Throttle grip ..................................... 24

Throttle indicator ............................. 24

Throttle friction adjuster ................... 24

Engine shut-off cord (lanyard) and

clip ................................................ 25

Engine stop button .......................... 26

Main switch ...................................... 26

Steering friction adjuster ................. 26

Power trim and tilt switch on remote

control or tiller handle ................... 27

Power trim and tilt switch on bottom

cowling.......................................... 27

Variable trolling RPM switches ........ 28

Trim tab with anode ......................... 28

Table of contents

Tilt support lever for power trim and

tilt model ....................................... 29

Cowling lock lever............................ 29

Flushing device ................................ 29

Fuel filter........................................... 30

Alert indicator .................................. 30

Instruments and indicators ............31

Indicators ..................................... 31

Low oil pressure-alert indicator........ 31

Overheat-alert indicator ................... 31

Digital tachometer ......................... 31

Tachometer ...................................... 31

Trim meter........................................ 32

Hour meter ....................................... 32

Low oil pressure-alert indicator........ 32

Overheat-alert indicator ................... 32

Digital speedometer ...................... 33

Speedometer.................................... 33

Fuel gauge........................................ 33

Trip meter / Clock / Voltmeter.......... 34

Fuel level-alert indicator................... 34

Low battery voltage-alert

indicator........................................ 35

6Y8 Multifunction meters .............. 35

Engine control system .................... 39

Alert system .................................. 39

Overheat alert................................... 39

Low oil pressure alert....................... 39

Water separator alert........................ 40

Installation ....................................... 42

Installation ..................................... 42

Mounting the outboard motor.......... 42

Operation ......................................... 44

First-time operation....................... 44

Fill engine oil .................................... 44

Breaking in engine............................ 44

Getting to know your boat ............... 44

Checks before starting engine ...... 45

Fuel level .......................................... 45

Removing top cowling...................... 45

Fuel system ...................................... 45

Controls............................................ 46

Engine shut-off cord (lanyard) .......... 46

Engine oil.......................................... 46

Outboard motor................................ 47

Flushing device ................................ 47

Install cowling................................... 47

Power trim and tilt system................ 48

Battery.............................................. 48

Filling fuel...................................... 49

Operating engine .......................... 51

Sending fuel (portable tank) ............. 51

Starting engine ................................. 52

Checks after starting engine ......... 55

Cooling water ................................... 55

Warming up engine....................... 55

Procedure for warming up engine.... 55

Checks after engine warm up ....... 55

Shifting ............................................. 55

Stop switches................................... 56

Shifting.......................................... 56

Stopping boat ............................... 57

Trolling .......................................... 58

Adjusting trolling speed.................... 58

Stopping engine............................ 58

Procedure......................................... 58

Trimming outboard motor............. 59

Adjusting trim angle (Power trim

and tilt) .......................................... 60

Adjusting boat trim........................... 60

Tilting up and down ...................... 61

Procedure for tilting up (power trim

and tilt models) ............................. 62

Procedure for tilting down................ 63

Shallow water .............................. 64

Cruising in shallow water ................. 64

Cruising in other conditions.......... 65

Maintenance.................................... 66

Transporting and storing

outboard motor.......................... 66

Storing outboard motor.................... 66

Table of contents

Procedure......................................... 67

Lubrication ....................................... 68

Flushing cooling water passage....... 69

Cleaning the outboard motor........... 69

Checking painted surface of

outboard motor............................. 70

Periodic maintenance ................... 70

Replacement parts........................... 70

Severe operating conditions ............ 70

Maintenance chart 1 ........................ 71

Maintenance chart 2 ........................ 74

Greasing........................................... 75

Inspecting spark plug....................... 76

Inspecting idle speed....................... 77

Changing engine oil.......................... 77

Replacing the engine oil filter........... 79

Why Yamalube ................................. 80

Inspecting wiring and connectors.... 81

Checking propeller........................... 81

Removing propeller.......................... 82

Installing propeller............................ 82

Changing gear oil ............................. 83

Inspecting and replacing anode(s) ... 84
Checking battery (for electric start

models) ......................................... 85

Connecting the battery..................... 86

Disconnecting the battery ................ 86

Trouble Recovery ............................ 87

Troubleshooting ............................ 87

Temporary action in emergency ... 90

Impact damage ................................ 90

Replacing fuse ................................. 90

Power trim and tilt will not

operate.......................................... 91

Water separator-alert is activated

after leaving port........................... 91

Treatment of submerged motor .... 93

INDEX ............................................... 94

Safety information

EMU33623

Outboard motor safety

Observe these precautions at all times.

EMU36502

Propeller

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

water near you.

 Keep people out of reach of the propeller,

even when the engine is off.

EMU40272

Rotating parts

Hands, feet, hair, jewelry, clothing, personal
flotation device (PFD) straps, etc., can be­come entangled with internal rotating parts of
the engine, resulting in serious injury or
death.
Keep the top cowling in place whenever pos­sible. Do not remove or replace the top cowl­ing with the engine running.
Only operate the engine with the top cowling
removed according to the specific instruc­tions in the manual. Keep hands, feet, hair,
jewelry, clothing, PFD straps, etc., away from
any exposed moving parts.

EMU33641

Hot parts

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

EMU33651

Electric shock

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

EMU33662

Power trim and tilt

Body parts can be crushed between the mo­tor and the clamp bracket when the motor is
trimmed or tilted. Keep body parts out of this
area at all times. Be sure no one is in this area
before operating the power trim and tilt
mechanism.
The power trim and tilt switches operate even
when the main switch is off. Keep people
away from the switches whenever working
around the motor.
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 motor
accidentally falls.

EMU33672

Engine shut-off cord (lanyard)

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

1

Safety information

EMU33811

Gasoline

Gasoline and its vapors are highly flamma­ble and explosive. Always, refuel according

to the procedure on page 51 to reduce the
risk of fire and explosion.

EMU33821

Gasoline exposure and spills

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

EMU33901

Carbon monoxide

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.

EMU33781

Modifications

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

EMU33742

Boating safety

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

EMU33711

Alcohol and drugs

Never operate after drinking alcohol or taking
drugs. Intoxication is one of the most com­mon factors contributing to boating fatalities.

EMU40281

Personal flotation devices (PFDs)

Have an approved PFD on board for every
occupant. Yamaha recommends that you
must wear a PFD whenever boating. At a
minimum, children and non-swimmers
should always wear PFDs, and everyone
should wear PFDs when there are potentially
hazardous boating conditions.

EMU33732

People in the water

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

EMU33752

Passengers

Consult your boat manufacturer’s instruc­tions for details about appropriate passenger
locations in your boat and be sure all passen­gers are positioned properly before acceler­ating and when operating above an idle
speed. Standing or sitting in non-designated
locations may result in being thrown either
overboard or within the boat due to waves,
wakes, or sudden changes in speed or direc­tion. Even when people are positioned prop-

2

Safety information

ZMU06025

erly, alert your passengers if you must make
any unusual maneuver. Always avoid jump­ing waves or wakes.

EMU33763

Overloading

Do not overload the boat. Consult the boat
capacity plate or boat manufacturer for max­imum weight and number of passengers. Be
sure that weight is properly distributed ac­cording to the boat manufacturer’s instruc­tions. Overloading or incorrect weight
distribution can compromise the boat’s han­dling and lead to an accident, capsizing or
swamping.

EMU33773

Avoid collisions

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

Operate defensively at safe speeds and keep
a safe distance away from people, objects,
and other boats.
 Do not follow directly behind other boats or

waterskiers.

 Avoid sharp turns or other maneuvers that

make it hard for others to avoid you or un­derstand where you are going.

 Avoid areas with submerged objects or

shallow water.

 Ride within your limits and avoid aggres-

sive maneuvers to reduce the risk of loss of
control, ejection, and collision.

 Take early action to avoid collisions. Re-

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

EMU48100

Collisions with floating or submerged
objects

If the outboard motor hits a floating object or
an obstacle in the water while cruising, the
following could occur:
 The passengers and any loose equipment

or luggage could be thrown forward due to
the sudden deceleration.

 Parts of the outboard motor could come

loose as a result of the impact and could be
thrown into the boat.

 The boat or outboard motor could be dam-

aged as a result of the impact.
When you operate the boat in an area where
there might be floating objects or obstacles in
the water, be sure to adjust the trim angle of
the outboard motor, slow down, and operate
carefully. For further information, see page

64.
If the outboard motor hits a floating object or
an obstacle in the water, make sure that there
are no abnormalities with the boat and the
outboard motor. If anything abnormal is
found, return to the nearest harbor at low
speed and have a Yamaha dealer inspect the
outboard motor.

3

Safety information

EMU33791

Weather

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

EMU33881

Passenger training

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

EMU33891

Boating safety publications

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

EMU33602

Laws and regulations

Know the marine laws and regulations where
you will be boating—and obey them. Several
sets of rules prevail according to geographic
location, but all are basically the same as the
International Rules of the Road.

4

General information

1

3412

ZMU01692

1

ZMU01694

EMU25172

Identification numbers record

EMU25186

Outboard motor serial number

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

1. Outboard motor serial number location

1. Serial number

2. Model name

3. Motor transom height

4. Engine code

EMU25192

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

EMU38984

EC Declaration of Conformity

(DoC)

This declaration is included with outboard
motors that conform to European regula­tions.
This outboard motor conforms to certain por­tions of the European Parliament directive re­lating to machinery.
Each conformed outboard motor accompa­nied with EC DoC. EC DoC contains the fol­lowing information;

 Manufacturer
 Model name
 Engine code
 Applied directives

EMU48442

CE Marking / UKCA Marking

This label is affixed to outboard motors that
conform to European regulations.

5

General information

1

6EE-43394-90

15210026

1

ZMU08190

1

ZMU08191

1

1. CE marking location

CE marking

Outboard motors affixed with this “CE” mark­ing conform with the directives of;
2006/42/EC, 2014/30/EU, and 2013/53/EU.

UKCA marking

This product is in compliance with the Recre­ational Craft Regulations 2017, Electromag­netic Compatibility Regulations 2016 and
Supply of Machinery (Safety) Regulations

2008.

EMU46133

Compliance mark label

Engines affixed with this label conform to the
regulations for each country.
This label is affixed to the clamp bracket or
swivel bracket.

1. Compliance mark label location

Regulatory Compliance Mark (RCM)

Engines affixed with this mark conform to
certain portion(s) of the Australian Radio
Communications Act.

1. Regulatory Compliance Mark (RCM)

ICES-002 Compliance Label

Engines affixed with this mark meet all re­quirements of the Canadian Interference
Causing Equipment Regulations.

1. ICES-002 Compliance Label

6

General information

1

3

2

EMU33524

Read manuals and labels

Before operating or working on this outboard motor:

 Read this manual.
 Read any manuals supplied with the boat.
 Read all labels on the outboard motor and the boat.

If you need any additional information, contact your Yamaha dealer.

EMU33836

Warning labels

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

7

General information

6EE-G2794-40

6EE-H1994-40

1

2

6EE-G2794-50

6EE-H1994-50

3

EMU34652

Contents of labels

The above warning labels mean as follows.

1

EWM01682

 Keep hands, hair, and clothing away

from rotating parts while the engine is
running.

 Do not touch or remove electrical parts

when starting or during operation.

2

EWM01672

 Read Owner’s Manuals and labels.
 Wear an approved personal flotation de-

vice (PFD).

8

 Attach engine shut-off cord (lanyard) to

your PFD, arm, or leg so the engine

stops if you accidentally leave the helm,

which could prevent a runaway boat.

EMU33851

Other labels

General information

ZMU05696

ZMU05664

ZMU05665

ZMU05666

https://www.yamaha-motor.eu/eu/
privacy/privacy-policy.aspx

EMU35133

Symbols

The following symbols mean as follows.

Notice/Warning

Read Owner’s Manual

Hazard caused by continuous rotation

Electrical hazard

EMU48000

Engine data recording

This model’s ECM stores certain engine data
to assist in the diagnosis of malfunctions and
for research, statistical analysis and develop­ment purposes.
Although the sensors and recorded data will
vary by model, the main data points are:
 Engine status and engine performance

data
This data will be uploaded only when a spe­cial Yamaha diagnostic tool is attached to the
engine, such as when maintenance checks or
service procedures are performed. Engine
data uploaded will be handled appropriately
according to the following Privacy Policy.

Privacy Policy

Yamaha will not disclose this data to a third
party except in the following cases. In addi­tion, Yamaha may provide engine data to a
contractor in order to outsource services re­lated to the handling of the engine data. Even
in this case, Yamaha will require the contrac­tor to properly handle the engine data we
provided and Yamaha will appropriately
manage the data.

 With the consent of the boat owner
 Where obligated by law

9

General information

 For use by Yamaha in litigation
 For general Yamaha-conducted research

purposes when the data is not related to an
individual engine or owner

10

Specifications and requirements

TIP:

EMU38092

Specifications

“(AL)” stated in the specification data below
represents the numerical value for the alumi­num propeller installed.

EMU48360

Dimension and weight:

Overall length:

803 mm (31.6 in)

Overall width:

488 mm (19.2 in)

Overall height L:

1622 mm (63.9 in)

Overall height X:

1749 mm (68.9 in)

Motor transom height L:

516 mm (20.3 in)

Motor transom height X:

643 mm (25.3 in)

Dry weight (AL) L:

162 kg (357 lb)

Dry weight (AL) X:

166 kg (366 lb)

Performance:

Full throttle operating range:

5000–6000 r/min

Rated power:

58.8 kW (80 HP) (F80B)

73.6 kW (100 HP) (F100B)

Idle speed (in neutral):

700–800 r/min

Power unit:

Type:

4-stroke SOHC L4 16 valves

Total displacement:

1832 cm³ (111.8 c.i.)

Bore × stroke:

81.0 × 88.9 mm (3.19 × 3.50 in)

Ignition system:

TCI

Spark plug (NGK):

LKR6E-9N

Spark plug gap:

0.8–0.9 mm (0.031–0.035 in)

Steering system:

Remote steering

Starting system:

Electric starter

Starting carburetion system:

Fuel injection

Valve clearance IN (cold engine):

0.15–0.25 mm (0.0059–0.0098 in)

Valve clearance EX (cold engine):

0.25–0.35 mm (0.0098–0.0138 in)

Battery rating (CCA/EN):

430–1080 A

Battery rating (20HR/IEC):

70 Ah

Maximum generator output:

35 A

Lower unit:

Gear shift positions:

Forward-neutral-reverse

Gear ratio:

2.15 (28/13)

Trim and tilt system:

Power trim and tilt

Propeller mark:

K

Fuel and oil:

Recommended fuel:

Regular unleaded gasoline

Min. research octane number (RON):

90

Fuel tank capacity:

25 L (6.61 US gal, 5.50 Imp.gal)

Recommended engine oil:

YAMALUBE 4 or 4-stroke outboard
motor oil

11

Specifications and requirements

EMU40491

Mounting outboard motor

EWM02501

Recommended engine oil grade 1:

SAE 10W-30/10W-40/5W-30

API SG/SH/SJ/SL
Engine oil quantity (without oil filter
replacement):

3.0 L (3.17 US qt, 2.64 Imp.qt)
Engine oil quantity (with oil filter
replacement):

3.2 L (3.38 US qt, 2.82 Imp.qt)
Lubrication system:

Wet sump

Recommended gear oil:

YAMALUBE outboard gear oil or Hypoid
gear oil

Recommended gear oil grade:

SAE 90 API GL-4 / SAE 80W API GL-5 /
SAE 90 API GL-5

Gear oil quantity:

0.760 L (0.803 US qt, 0.669 Imp.qt)

Noise and vibration level:

Operator sound pressure level (ICOMIA
39/94):

78.7 dB(A)

EMU33556

Installation requirements

EMU33566

Boat horsepower rating

EWM01561

Overpowering a boat can cause severe in­stability.

Before installing the outboard motor(s), con­firm that the total horsepower of your out­board motor(s) does not exceed the boat’s
maximum horsepower rating. See the boat’s
capacity plate or contact the manufacturer.

 Improper mounting of the outboard mo-

tor could result in hazardous conditions
such as poor handling, loss of control,
or fire hazards.

 Because the outboard motor is very

heavy, special equipment and training is
required to mount it safely.

Your dealer or other person experienced in
proper rigging should mount the outboard
motor using correct equipment and complete
rigging instructions. For further information,
see page 42.

EMU33582

Remote control requirements

EWM01581

 If the engine starts in gear, the boat can

move suddenly and unexpectedly, pos­sibly causing a collision or throwing
passengers overboard.

 If the engine ever starts in gear, the

start-in-gear protection device is not
working correctly and you should dis­continue using the outboard. Contact
your Yamaha dealer.

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

EMU25695

Battery requirements

EMU25723

Battery specifications

Battery rating (CCA/EN):

430–1080 A

Battery rating (20HR/IEC):

70 Ah

12

Specifications and requirements

3

1

2

-

x

123

A

AB

A

B

The engine cannot be started if battery volt­age is too low.

EMU36293

Mounting battery

Mount the battery holder securely in a dry,
well-ventilated, vibration-free location in the
boat. WARNING! Do not put flammable

items, or loose heavy or metal objects in
the same compartment as the battery.
Fire, explosion or sparks could result.

[EWM01821]

Battery cable

The battery cable size and length are critical.
Consult your Yamaha dealer about the bat­tery cable size and length.

EMU41604

Propeller selection

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

Yamaha recommends to use a propeller suit­able for the “Shift Dampener System (SDS)”.
For further information, consult your Yamaha
dealer.
To check the propeller, see page 81.

Propeller example

1. Propeller diameter in inches

2. Propeller pitch in inches

3. Type of propeller (propeller mark)

EMU25771

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 in neutral. Always select neutral be­fore starting the engine.

EMU41953

Engine oil requirements

Select an oil grade according to the average
temperatures in the area where the outboard
motor will be used.

13

Specifications and requirements

TIP:

ZMU08143

122˚F

50˚C

104

40

86

30

68

SAE API

SG
SH

SJ
SL

20

50

10

32

0

14

-10

-4

-20

10W–30

10W–40

5W–30

ZMU06855

122˚F

50˚C

104

40

86

30

68

SAE API

SH

SJ
SL

20

50

10

32

0

14

-10

-4

-20

15W–40

20W–40

20W–50

E5 E10

Recommended engine oil:

YAMALUBE 4 or 4-stroke outboard
motor oil

Recommended engine oil grade 1:

SAE 10W-30/10W-40/5W-30
API SG/SH/SJ/SL

Recommended engine oil grade 2:

SAE 15W-40/20W-40/20W-50
API SH/SJ/SL
Engine oil quantity (without oil filter
replacement):

3.0 L (3.17 US qt, 2.64 Imp.qt)
Engine oil quantity (with oil filter re­placement):

3.2 L (3.38 US qt, 2.82 Imp.qt)

If oil grades listed under Recommended en­gine oil grade 1 are not available, select an al­ternative oil grade listed under
Recommended engine oil grade 2.

Recommended engine oil grade 1

EMU36361

Fuel requirements

EMU40203

Gasoline

Use a good quality gasoline that meets the
minimum octane rating. If knocking or ping­ing occurs, use a different brand of gasoline
or premium unleaded fuel.

Recommended fuel:

Regular unleaded gasoline

Min. research octane number (RON):

90

ECM01982

 Do not use leaded gasoline. Leaded

gasoline can seriously damage the en­gine.

 Avoid getting water and contaminants in

the fuel tank. Contaminated fuel can
cause poor performance or engine dam­age. Use only fresh gasoline that has
been stored in clean containers.

Recommended engine oil grade 2

14

 This mark identifies the recommended fuel

for this outboard motor as specified by Eu­ropean regulation (EN228).

 Check that gasoline nozzle has the same

identifier when fueling.

Specifications and requirements

Gasohol

There are two types of gasohol: gasohol con­taining ethanol (E5 and E10) and that contain­ing methanol. Ethanol can be used if the
ethanol content does not exceed 10% and
the fuel meets the minimum octane ratings.
E85 is a fuel containing 85% ethanol and
must not be used in your outboard motor. All
ethanol blends containing more than 10%
ethanol can cause fuel system damage or
cause engine starting and running problems.
Yamaha does not recommend gasohol con­taining methanol because it can cause fuel
system damage or engine performance prob­lems.
It is recommended that you install a water­separating marine fuel filter assembly (10 mi­cron minimum) between your boat’s fuel tank
and outboard motor when using ethanol. Eth­anol is known to allow moisture to be ab­sorbed into boat fuel tanks and systems.
Moisture in the fuel can cause corrosion of
metallic fuel system components, starting
and running complaints and require addition­al fuel system maintenance.

EMU36881

Muddy or acidic water

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

EMU36331

Anti-fouling paint

A clean hull improves boat performance. The
boat bottom should be kept as clean of ma­rine growth 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.

EMU40302

Outboard motor disposal re-

quirements

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

EMU36353

Emergency equipment

Keep the following items onboard in case
there is trouble with the outboard motor.
 A tool kit with assorted screwdrivers, pliers,

wrenches (including metric sizes), and
electrical tape.

 Waterproof flashlight with extra batteries.
 An extra engine shut-off cord (lanyard) with

clip.

 Spare parts, such as an extra set of spark

plugs.

Consult your Yamaha dealer for details.

EMU39001

Emission control information

The following labels are affixed to outboard
motors that conform to US regulations.

EMU25232

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

15

Specifications and requirements

1

EMISSION CONTROL INFORMATION

THIS ENGINE CONFORMS TO CALIFORNIA EXHAUST
AND U.S. EPA EXHAUST AND EVAP REGULATIONS FOR SI
MARINE ENGINES. REFER TO OWNER’S MANUAL FOR
MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
FAMILY :

DISPLACEMENT : liters

MAX POWER : kW

EPA/CA FEL : HC+NOx ,CO g/kW-h

EPA CERTIFIED EVAP COMPONENTS :

YAMAHA MOTOR CO.,LTD.

ZMU06894

1

ZMU01702

EMU31563

Approval label of emission control certifi­cate

This label is attached at the location shown.
New Technology; (4-stroke) MFI

1. Star label location

EMU40331

One Star—Low Emission

The one-star label identifies engines that

1. Approval label location

meet the Air Resources Board’s Personal
Watercraft and Outboard marine engine 2001
exhaust emission standards. Engines meet­ing these standards have 75% lower emis­sions than conventional carbureted two­stroke engines. These engines are equivalent
to the U.S. EPA’s 2006 standards for marine
engines.

EMU25275

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.

16

EMU40341

Two Stars—Very Low Emission

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

Specifications and requirements

ZMU01703

ZMU01704

ZMU05663

EMU40351

Three Stars—Ultra Low Emission

The three-star label identifies engines that
meet the Air Resources Board’s Personal
Watercraft and Outboard marine engine 2008
exhaust emission standards or the Sterndrive
and Inboard marine engine 2003-2008 ex­haust emission standards. Engines meeting
these standards have 65% lower emissions
than One Star-Low-Emission engines.

EMU33862

Four Stars—Super Ultra Low Emission

The four-star label identifies engines that
meet the Air Resources Board’s Sterndrive
and Inboard marine engine 2009 exhaust
emission standards. Personal Watercraft and
Outboard marine engines may also comply
with these standards. Engines meeting these
standards have 90% lower emissions than
One Star-Low-Emission engines.

17

Components

TIP:

3

4
5

6

7

11

12

13

1

2

9

10

8

EMU46722

Components diagram

* May not be exactly as shown; also may not be included as standard equipment on all models
(order from dealer).

1. Fuse box

2. Fuel filter

3. Cowling lock lever

4. Power trim and tilt unit

5. Clamp bracket

6. Anode

7. Cooling water inlet

8. Propeller*

9. Trim tab (anode)

10.Anti-cavitation plate

11.Flushing device

12.Power trim and tilt switch

13.Top cowling

18

Components

6

1

2

3

4

7

8

5

1. Oil filler cap

2. Cowling lock lever

3. Cooling water pilot hole

4. Drain screw

5. Gear oil drain screw

6. Cooling water inlet

7. Oil level plug

8. Oil dipstick

19

Components

TRIP TIME BATT

Km/h
knot
mph

km
mile

SPEED

YAMAHA

set

mode

SET MODE

SET MODE

4

23

5 6 7

8 9

1

10

EMU46733

Optional items

The following items are available from your Yamaha dealer. For details, consult your Yamaha
dealer.

1. Remote control box (side mount type)

2. Remote control box (binnacle mount type)

3. Switch panel (for use with binnacle type)

4. Digital tachometer

5. Digital speedometer

6. 6Y8 Multifunction tachometer

7. 6Y8 Multifunction speed & fuel meter

8. Tiller handle

9. Fuel tank

10.Yamaha Security System (Y-COP)

20

EMU48740

Fuel tank (portable fuel tank)

This model can be equipped with an optional
portable fuel tank. The parts of the fuel tank
are as follows.

EWM00021

The fuel tank supplied with this engine is
its dedicated fuel reservoir and must not
be used as a fuel storage container. Com­mercial users should conform to relevant
licensing or approval authority regula­tions.

Components

1

2

3

3

5

4

12

EMU46753

Yamaha Security System (Y-COP/Op­tional)

ECM02461

The Yamaha Security System is sold in
conformity with the relevant laws and reg­ulations regarding radio wave transmis­sion. Therefore, if this product is used
outside the country where it was sold, it
may violate the laws or regulations re­garding radio wave transmission in the
country it is used in. For details, consult
your Yamaha dealer.

1. Fuel joint

2. Fuel gauge

3. Pressure relief tab

4. Fuel tank cap

5. Air vent screw

Fuel joint

This joint is used to connect the fuel line.

Fuel gauge

This gauge shows the approximate amount
of fuel remaining in the fuel tank.

Pressure relief tab

This tab is attached to the filler hole of the fuel
tank.

Fuel tank cap

This cap seals the fuel tank. To loosen the
cap, press and hold the pressure relief tab
and turn the cap counterclockwise.

Air vent screw

This screw is on the fuel tank cap. When turn­ing the air vent screw counterclockwise, it is
loosened and the pressure in the fuel tank is
released to a certain pressure. Air is allowed
to enter the fuel tank while operating the en­gine.

The Yamaha Security System, which pro­tects against theft, consists of the receiver
and key fobs. The Yamaha Security System
is available from your Yamaha dealer. For de­tails, consult your Yamaha dealer.

1. Key fob

2. Receiver

The engine cannot be started if the security
system is in the lock mode. The engine can
be started only in the unlock mode. For more
information, see the installation and owner’s
manual included with the security system.

EMU26182

Remote control box

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

21

Components

1
2

3

5

4

6

7

ZMU01723

2

1

3

4

1

23

44

5

5

6

6

7

7

F

N

R

ZMU01725

N

1

F

7

6

2

R

3

4

4

6

5

7

5

1. Power trim and tilt switch

2. Remote control lever

3. Neutral interlock trigger

4. Neutral throttle lever

5. Main switch

6. Engine shut-off switch

7. Throttle friction adjuster

1. Power trim and tilt switch

2. Remote control lever

3. Free accelerator

4. Throttle friction adjuster

EMU26191

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.

22

1. Neutral “ ”

2. Forward “ ”

3. Reverse “ ”

4. Shift

5. Fully closed

6. Throttle

7. Fully open

1. Neutral “ ”

2. Forward “ ”

3. Reverse “ ”

4. Shift

5. Fully closed

6. Throttle

7. Fully open

EMU26202

Neutral interlock trigger

To shift out of neutral, first pull the neutral in­terlock trigger up.

TIP:

TIP:

1

1

2

N

ZMU01728

N

1

3

2

ZMU01727

1. Neutral interlock trigger

EMU26213

Neutral throttle lever

To open the throttle without shifting into ei­ther forward or reverse, put the remote con­trol lever in the neutral position and lift the
neutral throttle lever.

Components

1. Fully open

2. Fully closed

3. Free accelerator

 The free accelerator button can only be

pushed when the remote control lever is in
the neutral position.

 After the button is pushed, the throttle be-

gins to open after the remote control lever
is moved at least 35°.

 After using the free accelerator, return the

remote control lever to the neutral position.
The free accelerator button will return auto­matically to its set position. The remote
control will then engage forward and re­verse normally.

1. Fully open

2. Fully closed

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.

EMU26234

Free accelerator

To open the throttle without shifting into ei­ther forward or reverse, push the free accel­erator button and move the remote control
lever.

EMU25914

Tiller handle

To change direction, move the tiller handle to
the left or right as necessary.

23

Components

22

1

3

2

1

3

111

ZMU01714

EMU25925

Gear shift lever

Move the gear shift lever forward to engage
the forward gear or rearward to engage the
reverse gear.

1. Forward “ ”

2. Neutral “ ”

3. Reverse “ ”

EMU25943

Throttle grip

The throttle grip is on the tiller handle. Turn
the grip counterclockwise to increase speed
and clockwise to decrease speed.

1. Throttle indicator

EMU25978

Throttle friction adjuster

A friction device provides adjustable resis­tance to movement of the throttle grip or the
remote control lever, and can be set accord­ing to operator preference.
To increase resistance, turn the adjuster
clockwise. To decrease resistance, turn the
adjuster counterclockwise. WARNING! Do

not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to move the remote control lever
or throttle grip, which could result in an
accident.

[EWM00033]

EMU25963

Throttle indicator

The fuel consumption curve on the throttle in­dicator shows the relative amount of fuel con­sumed for each throttle position. Choose the
setting that offers the best performance and
fuel economy for the desired operation.

24

When constant speed is desired, tighten the

ZMU04563

ZMU01716

1

2

3

1

2

3

adjuster to maintain the desired throttle set­ting.

Components

means the loss of most steering control.
Also, without engine power, the boat
could slow rapidly. This could cause peo­ple and objects in the boat to be thrown
forward.

1. Engine shut-off cord (lanyard)

2. Clip

3. Engine shut-off switch

[EWM00123]

EMU25996

Engine shut-off cord (lanyard) and clip

The clip must be attached to the engine shut­off switch for the engine to run. The cord
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
cord will pull out the clip, stopping ignition to
the engine. This will prevent the boat from
running away under power. WARNING! At-

tach the engine shut-off cord to a secure
place on your clothing, or your arm or leg
while operating. Do not attach the cord to
clothing that could tear loose. Do not
route the cord where it could become en­tangled, preventing it from functioning.
Avoid accidentally pulling the cord during
normal operation. Loss of engine power

1. Engine shut-off cord (lanyard)

2. Clip

3. Engine shut-off switch

25

Components

111

22

33

ON

STARTOFF

ZMU01718

ON

OFF

START

ZMU04567

1. Engine shut-off cord (lanyard)

2. Clip

3. Engine shut-off switch

EMU26004

Engine stop button

The engine stop button stops the engine
when the button is pushed.

With the main switch in the “ ” (start) po­sition, the starter motor turns to start the en­gine. When the key is released, it returns
automatically to the “ ” (on) position.

EMU26092

Main switch

The main switch controls the ignition system;
its operation is described below.
 “” (off)
With the main switch in the “ ” (off) posi­tion, the electrical circuits are off, and the key
can be removed.
 “” (on)
With the main switch in the “ ” (on) position,
the electrical circuits are on, and the key can­not be removed.
 “” (start)

26

EMU26113

Steering friction adjuster

A friction device provides adjustable resis­tance to the steering mechanism, and can be
set according to operator preference. An ad­juster lever is located on the bottom of the til­ler handle bracket.

To increase resistance, turn the lever to the

TIP:

port side “A”.
To decrease resistance, turn the lever to the
starboard side “B”.

EWM00041

Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to steer, which could result in an
accident.

 Check the tiller handle for smooth move-

ment when the lever is turned to the star­board side “B”.

 Do not apply lubricants such as grease to

the friction areas of the steering friction ad­juster.

EMU26144

Power trim and tilt switch on remote
control or tiller handle

The power trim and tilt system adjusts the
outboard motor angle in relation to the tran­som. Pressing the switch “ ” (up) trims the
outboard motor up, and then tilts it up. Press­ing the switch “ ” (down) tilts the outboard
motor down and trims it down. When the
switch is released, the outboard motor will
stop in its current position.
For instructions on using the power trim and
tilt switch, see pages 59 and 61.

Components

UP
DN

ZMU01720

EMU26156

Power trim and tilt switch on bottom
cowling

The power trim and tilt switch is located on
the side of the bottom cowling. Pushing the
switch “ ” (up) trims the outboard motor up,
and then tilts it up. Pushing the switch “ ”
(down) tilts the outboard motor down and
trims it down. When the switch is released,
the outboard motor will stop in its current po­sition.
For instructions on using the power trim and
tilt switch, see page 61.

EWM01032

Use the power trim and tilt switch located
on the bottom cowling only when the boat
is at a complete stop with the engine off.
Attempting to use this switch while the
boat is moving could increase the risk of

27

Components

TIP:

1

UP

DN

111

3

2

1

falling overboard and could distract the
operator, increasing the risk of collision
with another boat or an obstacle.

1. Power trim and tilt switch

EMU30903

Variable trolling RPM switches

The trolling speed can be adjusted when the
outboard motor is trolling. Press the “ ”
switch to increase the trolling speed and
press the “ ” switch to decrease the trolling
speed.

 For instructions on using the variable troll-

ing RPM switches, see page 58.

EMU26246

Trim tab with anode

EWM00841

An improperly adjusted trim tab could
cause difficult steering. Always test run af­ter the trim tab has been installed or re­placed to be sure steering is correct. Be
sure you have tightened the bolt after ad­justing the trim tab.

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

ECM00841

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.

1. Variable trolling RPM switch

 The trolling speed changes approximately

50 r/min each time a switch is pressed.

 If the trolling speed has been adjusted, the

engine returns to the normal trolling speed
when the engine is stopped and restarted
or when the engine speed exceeds ap­proximately 3000 r/min.

28

1. Cap

2. Bolt

3. Trim tab

Bolt tightening torque:

A

B

ZMU08077

1

1

1

42 N·m (4.2 kgf·m, 31 lb·ft)

Components

EMU40762

Cowling lock lever

The cowling lock levers are used to secure
the top cowling.

EMU26342

Tilt support lever for power trim and
tilt model

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

1. Tilt support lever

ECM00661

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

1. Cowling lock lever

1. Cowling lock lever

EMU40803

Flushing device

The flushing device is used to clean the cool­ing water passages of the outboard motor
using a garden hose and tap water. For in­structions on using the flushing device, see
page 69.

29

Components

1

1

1

1. Flushing device

EMU41312

Fuel filter

The fuel filter functions to remove foreign ma­terial and separate water from the fuel. If wa­ter separated from the fuel exceeds a specific
volume, the alert system will activate. For fur­ther information, see page 40.

1. Fuel filter

EMU26305

Alert indicator

If the engine develops a condition which is
cause for alert, the indicator lights up. For de­tails on how to read the alert indicator, see
page 39.

1. Alert indicator

30

Instruments and indicators

1

1

1

5

2

4

3

6

7

EMU36016

Indicators

EMU36026

Low oil pressure-alert indicator

If oil pressure drops too low, this indicator will
light up. For further information, see page 39.

ECM00024

 Do not continue to run the engine if the

low oil pressure-alert indicator is on and
the engine oil level is lower. Serious en­gine damage will occur.

 The low oil pressure-alert indicator does

not indicate the engine oil level. Use the
oil dipstick to check the oil level. For fur­ther information, see page 46.

1. Overheat-alert indicator

EMU41391

Digital tachometer

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

1. Low oil pressure-alert indicator

EMU36034

Overheat-alert indicator

If the engine temperature rises too high, this
indicator will light up. For further information
on reading the indicator, see page 39.

ECM00053

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

1. Tachometer

2. Trim meter

3. Hour meter

4. Low oil pressure-alert indicator

5. Overheat-alert indicator

6. Set button

7. Mode button

EMU36051

Tachometer

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

31

Instruments and indicators

ZMU01740

ZMU01741

ZMU01736

1

EMU26622

Trim meter

This meter shows the trim angle of your out­board motor.
 Memorize the trim angles that work best for

your boat under different conditions. Ad­just the trim angle to the desired using the
power trim and tilt switch.

 If the trim angle of your motor exceeds the

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

EMU26652

Hour meter

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

To reset the trip hours, simultaneously press
the “ ” (set) and “ ” (mode) buttons for
more than 1 second while the trip hours are
displayed. This resets the trip counter to 0
(zero).
The total number of hours the engine has
been run cannot be reset.

EMU26526

Low oil pressure-alert indicator

If oil pressure drops too low, the alert indica­tor will start to blink. For further information,
see page 39.

ECM00024

 Do not continue to run the engine if the

low oil pressure-alert indicator is on and
the engine oil level is lower. Serious en­gine damage will occur.

 The low oil pressure-alert indicator does

not indicate the engine oil level. Use the
oil dipstick to check the oil level. For fur­ther information, see page 46.

To change the display format, press the
“ ” (mode) button. The display can show
total hours or trip hours, or turn off.

32

1. Low oil pressure-alert indicator

EMU26584

Overheat-alert indicator

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

39.

Instruments and indicators

ZMU01737

1

TRIP TIME BATT

km/h
knot
mph

km
mile

SPEED

YAMAHA

set

mode

1

2

4

3

ZMU07002

ECM00053

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

1. Overheat-alert indicator

EMU26603

Digital speedometer

This gauge shows the boat speed and other
information.

EMU36062

Speedometer

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

1

2

km/h
(km)

mph
(mile)

knots
(mile)

1. Cap

2. Selector switch (for speed unit)

3. Selector switch (for fuel sensor)

EMU26714

Fuel gauge

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

1234

3

ZMU07001

1. Speedometer

2. Fuel gauge

3. Trip meter/clock/voltmeter

4. Alert indicator(s)

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

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

33

Instruments and indicators

TRIP TIME BATT

km/h
knot
mph

km
mile

SPEED

YAMAHA

set

mode

ZMU07003

TRIP TIME BATT

km/h
knot
mph

km
mile

SPEED

YAMAHA

set

mode

ZMU07004

your Yamaha dealer on how to correctly set
the selector switch. NOTICE: Running out of

fuel can damage the engine.

EMU36072

[ECM01771]

Trip meter / Clock / Voltmeter

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

EMU26692

Trip meter

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

(3) Press the “ ” (mode) button until the

desired hour is displayed.

(4) Press the “ ” (set) button again, the

minute display will begin blinking.

(5) Press the “ ” (mode) button until the

desired minute is displayed.

(6) Press the “ ” (set) button again to start

the clock.

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

EMU36081

Voltmeter

The voltmeter displays the charge of the bat­tery in volts(V).

EMU26702

Clock

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

mode.

(2) Press the “ ” (set) button; the hour dis-

34

play will begin blinking.

EMU26723

Fuel level-alert indicator

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

NOTICE: Running out of fuel can damage
the engine.

[ECM01771]

Instruments and indicators

TRIP TIME BATT

km/h
knot
mph

km
mile

SPEED

YAMAHA

set

mode

1

TRIP TIME BATT

km/h
knot
mph

km
mile

SPEED

YAMAHA

set

mode

ZMU07006

1

SET MODE

21

ZMU08407

1 2

3

ZMU08408

SET MODE

21

ZMU08409

6Y8 Multifunction tachometer

1. Fuel level-alert segment

EMU26733

Low battery voltage-alert indicator

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

1. Low battery indicator

EMU46654

6Y8 Multifunction meters

There are two types of 6Y8 Multifunction me­ters.

 6Y8 Multifunction tachometer
 6Y8 Multifunction speed & fuel meter

1. Set button

2. Mode button

1. Tachometer

2. Trim meter

3. Multifunction display

6Y8 Multifunction speed & fuel meter

1. Set button

2. Mode button

35

Instruments and indicators

TIP:

1

3

2

ZMU08410

1

7 6 5 4

2 3

ZMU08411

SET MODE

1

ZMU08412

1

ZMU08413

7. Cooling water pressure indicator (optional)

Yamaha Security System indicator (op­tional)

This indicator appears, when the Yamaha Se­curity System is in lock mode.

Lock mode

1. Speedometer

2. Fuel meter

3. Multifunction display

The information displayed on the multifunc­tion display can be changed. For information
on other settings or changing the displayed
information, see the operation manual includ­ed with the 6Y8 Multifunction meter.

This manual mainly covers the alert display of
the 6Y8 Multifunction tachometer. See the
following sections for information about the
alert indicators.

Indicators

1. Yamaha Security System indicator (optional)

Make sure that the Yamaha Security System
indicator is off before starting the engine.

Water separator-alert indicator

If water has accumulated in the water sepa­rator (fuel filter) while cruising, the water sep­arator-alert indicator will start to blink.

1. Yamaha Security System indicator (optional)

2. Water separator-alert indicator

3. Engine trouble-alert indicator

4. Battery voltage indicator

5. Overheat-alert indicator

6. Low oil pressure-alert indicator

36

1. Water separator-alert indicator

Stop the engine immediately and see page
90 of this manual to drain the water from the
fuel filter. Get back to the port soon and con­sult a Yamaha dealer immediately.

Instruments and indicators

1

ZMU08414

1

ZMU08415

1

ZMU08416

ECM00911

Gasoline mixed with water could cause
damage to the engine.

Engine trouble-alert indicator

If the engine malfunctions while cruising, the
engine trouble-alert indicator will start to
blink. Get back to the port soon and consult
a Yamaha dealer immediately.

1. Engine trouble-alert indicator

ECM00921

In such an event, the engine will not oper­ate properly. Consult a Yamaha dealer im­mediately.

Low battery voltage alert

If the battery voltage drops, the battery volt­age value will start to blink.

Get back to the port soon if the low battery
voltage alert device has activated. For charg­ing the battery, consult your Yamaha dealer.

Overheat-alert indicator

If the engine temperature rises too high while
cruising, the overheat-alert indicator will start
to blink, and the engine speed will automati­cally decrease to about 2000–3500 r/min.

1. Overheat-alert indicator

Stop the engine immediately if the buzzer
sounds and the overheat device has activat­ed. Check the cooling water inlet for clog­ging.

ECM01594

 Do not continue to run the engine if the

overheat-alert indicator blinks. Serious
engine damage will occur.

 Do not continue to operate the engine if

an alert device has activated. Consult
your Yamaha dealer if the problem can­not be located and corrected.

1. Battery voltage value

Low oil pressure-alert indicator

If the engine oil pressure drops too low, the
low oil pressure-alert indicator will start to
blink, and the engine speed will automatically
decrease to about 2000–3500 r/min.

37

Instruments and indicators

1

ZMU08417

1. Low oil pressure-alert indicator

Stop the engine immediately if the buzzer
sounds and the low oil pressure-alert indica­tor blinks. Check the engine oil level and re­plenish oil if necessary. If the alert device has
activated while the appropriate engine oil lev­el is maintained, consult your Yamaha dealer.

ECM01602

Do not continue to run the engine if the
low oil pressure alert device has activated.
Serious engine damage will occur.

38

EMU26806

ZMU05422

ZMU01758

ZMU04583

ZMU08288

Alert system

ECM00093

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

EMU43754

Overheat alert

This engine has an overheat-alert device. If
the engine temperature rises too high, the
alert device will activate.
 The engine speed will automatically de-

crease to 2000–3500 r/min.

 The overheat-alert indicator will light or

blink (if equipped).

Engine control system

If the alert system has activated, stop the en­gine and check the cooling water inlets:
 Check trim angle to be sure that the cooling

water inlet is submerged.

 Check the cooling water inlet for clogging.

 The buzzer will sound (if equipped on the

tiller handle, remote control box, or main
switch panel).

EMU2685A

Low oil pressure alert

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

39

Engine control system

ZMU05431

ZMU04583

ZMU01758

1

 The engine speed will automatically de-

crease to about 2000–3500 r/min. The low
oil pressure-alert indicator will light or blink.

 The buzzer will sound.

If the alert system has activated, stop the en­gine as soon as it is safe to do so. Check the
oil level and add oil as needed. If the oil level
is correct and the alert device does not
switch off, consult your Yamaha dealer.

EMU43953

Water separator alert

The outboard motor is equipped with a water
separator alert system. If water separated
from the fuel exceeds a specific volume, the
alert system will activate.
 The water separator-alert indicator will

come on or blink.

40

1. Water separator-alert indicator

 The buzzer will sound intermittently when

the remote control lever is in the neutral po­sition.

Engine control system

ZMU01758

ZMU04583

If the alert system has activated, stop the en­gine and check the fuel filter. If any water is
found in the fuel, consult a Yamaha dealer.

ECM02341

Although the buzzer will stop when the en­gine is started and the remote control le­ver is moved to the forward or reverse
position, do not use the outboard motor.
Otherwise, serious engine damage could
occur.

41

Installation

1

EMU26903

Installation

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

EWM01591

 Overpowering a boat could cause se-

vere 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.

 Improper mounting of the outboard mo-

tor could result in hazardous conditions
such as poor handling, loss of control,
or fire hazards. For permanently mount­ed models, your dealer or other person
experienced in proper rigging should
mount the motor.

EMU33471

Mounting the outboard motor

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

1. Center line (keel line)

EMU26937

Mounting height (boat bottom)

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

42

ECM01635

ZMU01762

 Make sure that the idle hole is high

enough to prevent water from entering
the engine even if the boat is stationary
with the maximum load.

 Incorrect engine height or obstructions

to the smooth flow of water (such as the
design or condition of the boat, or ac­cessories, such as transom ladders or
depth finder transducers) can create air­borne water spray while the boat is
cruising. If the outboard motor is oper­ated continuously in the presence of air­borne water spray, enough water could
enter the engine through the air intake
opening in the top cowling to cause se­vere engine damage. Remove the cause
of the airborne water spray.

Installation

43

Operation

TIP:

ZMU01710

EMU36382

First-time operation

EMU36393

Fill engine oil

The engine is shipped from the factory with­out engine oil. If your dealer did not fill the oil,
you must fill it before starting the engine.

NOTICE: Check that the engine is filled
with oil before first-time operation to avoid
severe engine damage.

The engine is shipped with the following tag,
which should be removed after engine oil is
filled for the first time. For more information
on checking the engine oil level, see page 46.

[ECM01782]

life. NOTICE: Failure to follow the break-in

procedure could result in reduced engine
life or even severe engine damage.

EMU27086

[ECM00802]

Procedure for 4-stroke models

Your new engine requires a period of 10
hours break-in to allow mating surfaces of
moving parts to wear in evenly.

Run the engine in the water, under load (in
gear with a propeller installed) as follows. For
10 hours for breaking in engine avoid extend­ed idling, rough water and crowded areas.
(1) For the first hour of operation:

Run the engine at varying speeds up to
2000 r/min or approximately half throttle.

(2) For the second hour of operation:

Increase engine speed as much as nec­essary to put the boat on plane (but
avoid full-throttle operation), then back
off on the throttle while keeping the boat
at a planing speed.

(3) Remaining 8 hours:

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

(4) After the first 10 hours:

Operate the engine normally.

EMU30175

Breaking in engine

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

44

EMU36402

Getting to know your boat

All boats have unique handling characteris­tics. Operate cautiously while you learn how
your boat handles under different conditions
and various trim angles (see page 59).

EMU36414

1

1

Checks before starting engine

EWM01922

If any item in “Checks before starting en­gine” is not working properly, have it in­spected and repaired before operating the
outboard motor. Otherwise, an accident
could occur.

ECM00121

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

Operation

1. Cowling lock lever

EMU36443

Fuel system

EWM00061

EMU36422

Fuel level

Be sure you have plenty of fuel for your trip. A
good rule is to use 1/3 of your fuel to get to
the destination, 1/3 to return, and to keep 1/3
as an emergency reserve. With the boat level
on a trailer or in the water, turn the key to “ ”
(on) and check the fuel level. For fuel filling in­structions, see page 49.

EMU40774

Removing top cowling

For the following checks, remove the top
cowling from the bottom cowling.
To remove the top cowling, pull the cowling
lock levers and lift up the top cowling.

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

EWM00911

Leaking fuel can result in fire or explosion.

 Check for fuel leakage regularly.
 If any fuel leakage is found, the fuel sys-

tem must be repaired by a qualified me­chanic. Improper repairs can make the
outboard unsafe to operate.

EMU36453

Check for fuel leaks

 Check for fuel leaks or gasoline fumes in

the boat.

 Check for fuel leakage from the fuel sys-

tem.

 Check the fuel tank and fuel lines for

cracks, swellings, or other damage.

1. Cowling lock lever

45

Operation

1

ZMU06873

1

2

1

EMU37323

Checking the fuel filter

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

1. Fuel filter

EMU36903

Controls

Tiller handle models:
 Move the tiller handle fully to the left and

right to make sure operation is smooth.

 Turn the throttle grip from the fully closed

to the fully open position. Make sure that it
turns smoothly and that it completely re­turns to the fully closed position.

 Look for loose or damaged connections of

the throttle and shift cables.
Remote control models:
 Turn the steering wheel full-right and full-

left. Make sure operation is smooth and un-

restricted throughout the whole range with

no binding or excessive free play.
 Operate the throttle levers several times to

make sure there is no hesitation in their

travel. Operation should be smooth over

the complete range of motion, and each le-

ver should return completely to the idle po-

sition.

 Look for loose or damaged connections of

the throttle and shift cables.

EMU36484

Engine shut-off cord (lanyard)

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

1. Clip

2. Engine shut-off cord (lanyard)

EMU40994

Engine oil

(1) Place the outboard motor in a vertical

position (not tilted). NOTICE: If the out-

board motor is not level, the oil level
indicated on the oil dipstick may not
be accurate.

(2) Remove the oil dipstick and wipe it

clean.

1. Oil dipstick

(3) Insert the oil dipstick completely and re-

move it again.

[ECM01862]

46

(4) Check that the oil level on the oil dipstick

1

3 2

123

1

2

is between the upper and lower marks.
Consult your Yamaha dealer if the oil lev­el is not at the proper level or if it appears
milky or dirty.

1. Oil dipstick

2. Upper mark

3. Lower mark

EMU40412

Outboard motor

 Check that the outboard motor is mounted

properly and check the outboard motor

mounting bolts for looseness.

 Check the propeller for damage.
 Check for engine oil leaks.

Operation

1. Fitting

2. Garden hose connector

3. Flushing device

EMU36965

Install cowling

(1) Be sure that all cowling lock levers are

released.

(2) Be sure that the rubber seal is seated all

the way around the top cowling.

EMU36494

Flushing device

Check that the flushing device’s garden hose
connector is securely screwed on to the fit­ting on the bottom cowling. NOTICE: If the

garden hose connector is not properly
connected, cooling water can leak out and
the engine can overheat during operation.

[ECM01802]

1. Top cowling

2. Rubber seal

(3) Place the top cowling on the bottom

cowling.

(4) Check to be sure the rubber seal is seat-

ed correctly between the top cowling
and the bottom cowling.

(5) Move the cowling lock levers to lock the

top cowling as shown. NOTICE: If the

top cowling is not installed correctly,

47

Operation

1

1

ZMU07760

1

ZMU08094

water spray under the top cowling can
damage the engine, or the top cowling
can blow off at high speeds.

1. Cowling lock lever

1. Cowling lock lever

[ECM01992]

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

EMU34582

Power trim and tilt system

EWM01931

 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 motor accidentally falls.

 Body parts can be crushed between the

motor and the clamp bracket when the
motor is trimmed or tilted.

 Be sure no one is near the outboard mo-

tor before performing this check.

(1) Check the power trim and tilt unit for any

sign of oil leaks.

(2) Operate each of the power trim and tilt

switches to check that all switches work.

(3) Tilt the outboard motor up and check

that the trim and tilt rod is pushed out
completely.

48

1. Trim and tilt rod

(4) Check that the trim and tilt rod is free of

corrosion or other flaws.

(5) Tilt the outboard motor down. Check

that the trim and tilt rod operates
smoothly.

EMU36585

Battery

Check the battery’s charge. If your boat is
equipped with a Yamaha digital speedome­ter, the voltmeter and low battery alert func-

Operation

ZMU07443

21

1

ZMU07444

tions will help you monitor the battery’s
charge. A battery in good condition will pro­vide a minimum of 12 volts. Check that the
battery connections are clean, secure and
covered by insulating covers. The electrical
connections of the battery and cables must
be clean and properly connected or the bat­tery will not start the engine.
If the battery needs charging, consult your
Yamaha dealer or the battery manufacturer’s
instructions.

EMU43164

Filling fuel

EWM01831

 Gasoline and its vapors are highly flam-

mable and explosive. Always refuel ac-

cording to this procedure to reduce the

risk of fire and explosion.
 Gasoline is poisonous and can cause in-

jury or death. Handle gasoline with care.

Never siphon gasoline by mouth. If you

should swallow some gasoline or inhale

a lot of gasoline vapor, or get some gas-

oline in your eyes, see your doctor im-

mediately. If gasoline spills on your skin,

wash with soap and water. If gasoline

spills on your clothing, change your

clothes.

Before refueling, check the following points:

 Ensure the engine is stopped.
 Securely moor the boat in a well-ventilated

area and stop the engine. If the boat is

trailered, ensure it is stable.
 Do not smoke and keep away from sparks,

flames, static electric discharges, or other

sources of ignition.
 If you use a portable container to store and

dispense fuel, use only a locally approved

GASOLINE container.

 To prevent electrostatic sparks, discharge

any built-up static electricity from your
body before refueling.

(1) Disconnect the fuel hose from the fuel

joint on the fuel tank.

1. Fuel joint

2. Fuel hose

(2) Turn the air vent screw clockwise to

close it.

1. Air vent screw

(3) Remove the fuel tank from the boat.
(4) To loosen the air vent screw, turn it coun-

terclockwise until it stops.

49

Operation

TIP:

TIP:

1

ZMU07445

1

2

ZMU07446

1

2

ZMU07447

ZMU07448

1. Air vent screw

(5) While pressing and holding the pressure

relief tab under the fuel tank cap, slowly
turn the fuel tank cap counterclockwise
1/4 turn.

1. Pressure relief tab

2. Fuel tank cap

Release the fuel vapor contained in the fuel
tank.
(6) While pressing and holding the pressure

relief tab under the fuel tank cap again,
turn the fuel tank cap counterclockwise
to remove it.

1. Pressure relief tab

2. Fuel tank cap

(7) Fill the fuel tank with fuel. WARNING! Do

not overfill. Otherwise fuel can expand
and overflow if the temperature in­creases.

[EWM02611]

Fuel tank capacity:

25 L (6.61 US gal, 5.50 Imp.gal)

 Wipe up any spilled gasoline immediately

with dry rags.

 Dispose of rags properly according to local

laws or regulations.

(8) Turn the fuel tank cap clockwise to tight-

en until a click is heard.

50

1. Fuel tank cap

1

ZMU07449

1

ZMU07444

1

ZMU07445

ZMU07455

21

(9) Turn the air vent screw clockwise to

close it.

Operation

 This product emits exhaust gases which

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

EMU43842

Sending fuel (portable tank)

(1) To loosen the air vent screw, turn it coun-

terclockwise until it stops.

1. Air vent screw

EMU27453

Operating engine

EWM00421

 Before starting the engine, make sure

that the boat is tightly moored and that

you can steer clear of any obstructions.

Be sure there are no swimmers in the

water near you.
 When the air vent screw is loosened,

gasoline vapor will be released. Gaso-

line is highly flammable, and its vapors

are flammable and explosive. Refrain

from smoking, and keep away from

open flames and sparks while loosening

the air vent screw.

1. Air vent screw

(2) Firmly connect the other end of the fuel

hose to the joint on the fuel tank.

1. Fuel joint

2. Fuel hose

(3) Wipe up any spilled gasoline immediate-

ly with dry rags.

51

Operation

TIP:

TIP:

TIP:

11

2

2

Dispose of rags properly according to local
laws or regulations.
(4) Squeeze the primer pump, with the ar-

row pointing up, until you feel it become
firm. During engine operation, place the
tank horizontally, otherwise fuel cannot
be drawn from the fuel tank.

1. Arrow

2. Primer pump

 When using the fuel tank on the boat, a fuel

valve may also be equipped on the boat.

Open the fuel valve.
 Check the boat’s manual for the position of

the fuel valve.

EMU27597

Electric start / prime start models

EWM01842

 Failure to attach the engine shut-off

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

 Avoid accidentally pulling the cord dur-

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

(1) Place the gear shift lever in neutral.

EMU27496

Starting engine

EWM01601

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.

52

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

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

(3) Place the throttle grip in the “ ”

TIP:

(start) position. After the engine starts,
return the throttle to the fully closed po­sition.

(4) Turn the main switch to “ ” (start),

and hold it for a maximum of 5 seconds.

(5) Immediately after the engine starts, re-

lease the main switch and allow it to re­turn to “ ” (on). NOTICE: Never turn

the main switch to “ ” (start) while
the engine is running. Do not keep the

Operation

starter motor turning for more than 5
seconds. If the starter motor is turned
continuously for more than 5 seconds,
the battery will be quickly discharged,
thus making it impossible to start the
engine. The starter can also be dam­aged. If the engine will not start after 5
seconds of cranking, return the main
switch to “ ” (on), wait 10 seconds,
then crank the engine again.

 When the engine is cold, it needs to be

warmed up. For further information, see
page 55.

 If the engine is warm and fails to start, open

the throttle slightly and try to start the en­gine again. If the engine still fails to start,
see page 87.

EMU27666

Electric start and remote control models

EWM01842

 Failure to attach the engine shut-off

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

 Avoid accidentally pulling the cord dur-

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

(1) Place the remote control lever in neutral.

[ECM00193]

53

Operation

TIP:

N

ZMU01771

N

ZMU04588

ZMU01772

ZMU04595

ON

START

ZMU01774

ON

START

ZMU04596

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

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

(3) Turn the main switch to “ ” (on).
(4) Turn the main switch to “ ” (start),

and hold it for a maximum of 5 seconds.

54

(5) Immediately after the engine starts, re-

lease the main switch and allow it to re­turn to “ ” (on). NOTICE: Never turn

the main switch to “ ” (start) while
the engine is running. Do not keep the
starter motor turning for more than 5
seconds. If the starter motor is turned
continuously for more than 5 seconds,

the battery will be quickly discharged,

TIP:

1

thus making it impossible to start the
engine. The starter can also be dam­aged. If the engine will not start after 5
seconds of cranking, return the main
switch to “ ” (on), wait 10 seconds,
then crank the engine again.

[ECM00193]

 When the engine is cold, it needs to be

warmed up. For further information, see

page 55.
 If the engine is warm and fails to start, open

the throttle slightly and try to start the en-

gine again. If the engine still fails to start,

see page 87.

EMU36511

Checks after starting engine

EMU36524

Cooling water

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

ECM01811

If water is not flowing out of the pilot hole
at all times while the engine is running,
overheating and serious damage could
occur. Stop the engine and check whether
the cooling water inlet on the lower case
or the cooling water pilot hole is blocked.
Consult your Yamaha dealer if the prob­lem cannot be located and corrected.

Operation

1. Cooling water pilot hole

EMU27671

Warming up engine

EMU41234

Procedure for warming up engine

(1) After starting the engine, warm up the

engine until the engine speed stabilizes
at idle speed to provide maximum oper­ating performance and acceleration.

NOTICE: Failure to do so will shorten
engine life.

Idle speed (in neutral):

700–800 r/min

(2) Check that the low oil pressure-alert indi-

cator remains off. NOTICE: If the low oil

pressure-alert indicator blinks after
the engine starts, stop the engine.
Otherwise, serious engine damage
could occur. Consult your Yamaha
dealer.

EMU36532

Checks after engine warm up

EMU36542

Shifting

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

[ECM04550]

[ECM02381]

55

Operation

TIP:

F

N

R

32˚

32˚

ZMU05460

EMU36981

Stop switches

 Turn the main switch to “ ”, or press the

engine stop button and make sure the en-

gine stops.
 Confirm that removing the clip from the en-

gine shut-off switch stops the engine.
 Confirm that the engine cannot be started

with the clip removed from the engine shut-

off switch.

EMU34492

Shifting

EWM00181

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

ECM01611

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

(2) Move the remote control lever / gear shift

lever firmly and crisply forward (for for­ward gear) or backward (for reverse gear)
[about 35° (a detent can felt) for remote
control models].

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

equipped).

1. Neutral interlock trigger

56

1

ZMU01727

Tiller handle models: The gear shift lever op­erates only when the throttle grip is in the fully
closed position.

To shift from in gear (forward/reverse) to neu-

RF

ZMU05462

N

ZMU01771

N

ZMU04588

tral
(1) Close the throttle so that the engine

slows to idle speed.

Operation

(2) After the engine is at idle speed in gear

move the remote control lever / gear shift
lever firmly and crisply into the neutral
position.

EMU31743

Stopping boat

EWM01511

 Do not use the reverse function to slow

down or stop the boat as it could cause
you to lose control, be ejected, or im­pact the steering wheel or other parts of
the boat. This could increase the risk of
serious injury. It could also damage the
shift mechanism.

57

Operation

TIP:

1121

2

ON

OFF

ZMU01779

ONOFF START

ZMU04599

 Do not shift into reverse while traveling

at planing speeds. Loss of control, boat

swamping, or damage to the boat could

occur.

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

EMU30881

Trolling

EMU30891

Adjusting trolling speed

The trolling speed on outboard motors
equipped with the variable trolling RPM
switches can be adjusted approximately 50
r/min with each press of a switch.

 If the trolling speed has been adjusted, the

engine returns to the normal trolling speed
when the engine is stopped and restarted
or when the engine speed exceeds ap­proximately 3000 r/min.

EMU27823

Stopping engine

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

EMU43852

Procedure

(1) Push and hold the engine stop button or

turn the main switch to “ ” (off).

1. “ ” switch

2. “ ” switch

To increase the trolling speed, press the “ ”
switch.
To decrease the trolling speed, press the
“” switch.

 The trolling speed changes approximately

50 r/min each time a switch is pressed.

58

(2) After stopping the engine, disconnect

TIP:

ZMU07443

21

1

ZMU07444

the fuel hose from the fuel joint on the
fuel tank.

Operation

1. Air vent screw

(4) Remove the key if the boat will be left un-

attended.

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

EMU27865

Trimming outboard motor

EWM00741

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.

1. Fuel joint

2. Fuel hose

(3) Tighten the air vent screw by turning it

clockwise.

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

59

Operation

1

11

1. Trim operating angle

EMU27889

Adjusting trim angle (Power trim and
tilt)

EWM00754

 Be sure all people are clear of the out-

board motor when adjusting the trim an-

gle. Body parts can be crushed between

the motor and the clamp bracket when

the motor is trimmed or tilted.
 Use caution when trying a trim position

for the first time. Increase speed gradu-

ally and watch for any signs of instability

or control problems. Improper trim an-

gle can cause loss of control.
 If equipped with a power trim and tilt

switch located on the bottom cowling,

use the switch only when the boat is at a

complete stop with the engine off. Do

not adjust the trim angle with this switch

while the boat is moving.

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

UP
DN

1

ZMU01781

1. Power trim and tilt switch

1. Power trim and tilt switch

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

EMU27913

Adjusting boat trim

When the boat is on plane, a bow-up attitude
results in less drag, greater stability and effi­ciency. This is generally when the keel line of
the boat is up about 3 to 5 degrees. With the
bow up, the boat may have a greater tenden­cy to steer to one side or the other. Compen­sate for this as you steer. When the bow of
the boat is down, it is easier to accelerate
from a standing start onto plane.

60

Bow Up

TIP:

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-out can also cause
the propeller to ventilate, which reduces per­formance further, and the boat may “por­poise” (hop in the water), which could throw
the operator and passengers overboard.

Operation

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

EMU27936

Tilting up and down

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

EWM00223

Bow Down

Too much trim-in causes the boat to “plow”
through the water, decreasing fuel economy
and making it 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.

Make sure that no one is near the out­board motor when tilting the outboard
motor up or down. Otherwise, body parts
could be crushed between the outboard
motor and the clamp bracket.

EWM00251

Leaking fuel is a fire hazard. If there is a
fuel joint on the outboard motor, 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.

61

Operation

N

ZMU01771

N

ZMU04588

UP

1

1

UP

ECM00242

 Before tilting the outboard motor, stop

the engine by following the procedure

on page 58. Never tilt the outboard mo-

tor while the engine is running. Severe

damage from overheating can result.
 Do not tilt up the engine by pushing the

tiller handle (if equipped) because this

could break the handle.

EMU44631

Procedure for tilting up (power trim
and tilt models)

(1) Place the remote control lever / gear shift

lever in neutral.

(2) Press the power trim and tilt switch “ ”

(up) until the outboard motor has tilted
up completely.

62

1. Power trim and tilt switch

1. Power trim and tilt switch

1. Power trim and tilt switch

1

1

1

1

DN

(3) Pull the tilt support lever toward you to

support the engine. WARNING! After

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

[EWM00263] NOTICE: Do not use the

tilt support lever or knob when traile­ring the boat. The outboard motor
could shake loose from the tilt support
and fall. If the motor cannot be
trailered in the normal running posi­tion, use an additional support device
to secure it in the tilt position. For
more detailed information, see page

66.

[ECM01642]

Operation

EMU42702

Procedure for tilting down

(1) Push the power trim and tilt switch “ ”

(up) until the outboard motor is support­ed by the tilt rod and the tilt support lever
becomes free.

(2) Release the tilt support lever.

1. Tilt support lever

(3) Push the power trim and tilt switch “ ”

(down) to lower the outboard motor to
the desired position.

1. Tilt support lever

1. Power trim and tilt switch

63

Operation

1

1

DN

1

N

ZMU01771

N

ZMU04588

1. Power trim and tilt switch

1. Power trim and tilt switch

EMU28063

Shallow water

EMU40702

Cruising in shallow water

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

ECM02361

Do not tilt the outboard motor up so that
the cooling water inlet on the lower unit is
above the surface of the water when set­ting up for and cruising in shallow water.
Otherwise severe damage from overheat­ing can result.

1. Cooling water inlet

EMU32914

Procedure for power trim and tilt models

(1) Place the remote control lever / gear shift

lever in neutral.

64

(2) Slightly tilt the outboard motor up to the

desired position using the power trim
and tilt switch. WARNING! Using the

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

[EWM01851]

(3) To return the outboard motor to the nor-

mal running position, press the power
trim and tilt switch and slowly tilt the out­board motor down.

EMU28196

Cruising in other conditions

Cruising in salt water

After operating in salt water, flush the cooling
water passages with fresh water to prevent
them from becoming clogged. Also rinse the
outside of the outboard motor with fresh wa­ter.

Cruising in muddy, turbid, or acidic water

Yamaha strongly recommends that you use
the optional chromium-plated water pump kit
(see page 15) if you use the outboard motor
in acidic water or water with a lot of sediment
in it, such as muddy or turbid (cloudy) water.
After operating in such water, flush the cool­ing passages with fresh water to prevent cor­rosion. Also rinse the outside of the outboard
motor with fresh water.

Operation

65

Maintenance

EMU2822B

Transporting and storing out-

board motor

EWM02621

 USE CARE when transporting fuel tank,

whether in a boat or car.
 DO NOT fill fuel container to maximum

capacity. Gasoline will expand consider-

ably as it warms up and can build up

pressure in the fuel container. This can

cause fuel leakage and a potential fire

hazard.
 Leaking fuel is a fire hazard. When

transporting and storing the outboard

motor, disconnect the fuel line from the

outboard motor to prevent fuel from

leaking.
 Never get under the outboard motor

while it is tilted. Severe injury could oc-

cur if the outboard motor accidentally

falls.
 Do not use the tilt support lever or knob

when trailering the boat. The outboard

motor could shake loose from the tilt

support and fall. If the outboard motor

cannot be trailered in the normal run-

ning position, use an additional support

device to secure it in the tilt position.

ECM02441

When storing the outboard motor for pro­longed time, fuel must be drained from the
fuel tank. The deteriorated fuel could clog
the fuel line causing engine start difficulty
or malfunction.

When storing or transporting the outboard
motor, make sure to follow the procedure list­ed below.

 Disconnect the fuel line from the outboard

motor.

 Tighten the fuel tank cap and its air vent

screw.

 When the outboard motor is tilted pro-

longed time for mooring or trailering the
boat, disconnect the fuel line from the out­board motor. Tighten the fuel tank cap and

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

EMU44930

Storing outboard motor

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

ECM04450

 To prevent problems which can be

caused by oil entering the cylinder from

the sump, keep the outboard motor in

the attitude shown when transporting

and storing it. If storing or transporting

the outboard motor on its side (not up-

right, port side only), put it on a cushion

after draining the engine oil.

66

Maintenance

ZMU08126

 Do not place the outboard motor on its

side before the cooling water has
drained from it completely, otherwise
water may enter the cylinder through the
exhaust port and cause engine trouble.

 Store the outboard motor in a dry, well-

ventilated place, not in direct sunlight.

 Drain the remaining gasoline from the

vapor separator. Gasoline left in the va­por separator for a prolonged period of
time will break down and could cause
damage to the fuel line.

EMU28306

Procedure

EMU44323

Flushing with the flushing attachment

EWM00323

You could be seriously injured if the en­gine accidentally starts when you are near
the propeller.
 Before inspecting, removing, or install-

ing the propeller, remove the ignition
coils from the spark plugs. Also, place
the shift control in neutral, turn the main
switch to “ ” (off) and remove the key,
and remove the clip from the engine
shut-off switch. Turn off the battery cut­off switch if your boat has one.

 Do not use your hand to hold the propel-

ler when loosening or tightening the

propeller nut. Put a wood block between

the anti-cavitation plate and the propel-

ler to prevent the propeller from turning.

Cooling system flushing is essential to pre­vent the cooling system from clogging up
with salt, sand, or dirt. In addition, fogging/lu­bricating of the engine is mandatory to pre­vent excessive engine damage due to rust.
Perform the flushing and fogging at the same
time.
(1) If there is a fuel joint or a fuel valve on the

boat, disconnect the fuel line from the
joint or close the fuel valve.

(2) Wash the exterior of the outboard motor

using fresh water. NOTICE: Do not

spray water into the air intake.

[ECM01841]

For further information, see page 69.
(3) Remove the top cowling and propeller.
(4) Install the flushing attachment over the

cooling water inlet, and then turn on the

water supply. NOTICE: Do not run the

engine without supplying it with cool-

ing water. Either the engine water

pump will be damaged or the engine

will be damaged from overheating.

Before starting the engine, be sure to

supply water to the cooling water pas-

sages. Avoid running the outboard

motor at high speed while on the

flushing attachment, otherwise over-

heating could occur.

[ECM02001]

67

Maintenance

TIP:

TIP:

TIP:

1

ZMU08695

1. Flushing attachment

A flushing attachment is available from your
Yamaha dealer.
(5) Run the engine at a fast idle for a few

minutes in neutral while supplying fresh
water. WARNING! Do not touch or re-

move electrical parts when starting or
during operation. Keep hands, hair,
and clothes away from the flywheel
and other rotating parts while the en­gine is running.
turn the main switch to “ ” (start)
while the engine is running. Do not
keep the starter motor turning for
more than 5 seconds. If the starter
motor is turned continuously for more
than 5 seconds, the battery will be
quickly discharged, thus making it im­possible to start the engine. The start­er can also be damaged. If the engine
will not start after 5 seconds of crank­ing, return the main switch to “ ”
(on), wait 10 seconds, then crank the
engine again.

 When using the flushing attachment, main-

tain adequate water pressure so that there
is a steady flow of water from the cooling
water pilot hole.

[EWM00092] NOTICE: Never

[ECM00193]

 If the overheat alert device is activated, turn

the engine off, and consult your Yamaha
dealer.

(6) Just prior to turning off the engine, quick-

ly spray fogging oil into the intake silenc-

er. When properly done, the engine will

smoke excessively and almost stall.

If fogging oil is not available, consult your
Yamaha dealer.
(7) Turn off the water supply, and then re-

move the flushing attachment and wipe

off any excess water.
(8) Install the top cowling and propeller.
(9) Drain the cooling water completely out of

the outboard motor. Clean the exterior of

the outboard motor thoroughly.

EMU41321

Draining the gasoline from the vapor sep­arator

Gasoline in the vapor separator must be
drained before storing the outboard motor.
Have a Yamaha dealer drain the gasoline
from the vapor separator.

EMU41072

Lubrication

(1) Change the gear oil. For instructions, see

page 83. Check the gear oil for the pres-

ence of water that indicates a leaky seal.

68

Seal replacement should be performed

TIP:

TIP:

2 1

23 1

by an authorized Yamaha dealer prior to
use.

(2) Lubricate all grease fittings. For further

details, see page 75.

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

EMU40964

Flushing cooling water passage

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

ECM01531

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

(1) Disconnect the garden hose connector

from the fitting on the bottom cowling.

Maintenance

1. Garden hose

2. Garden hose adapter (commercially avail­able)

3. Garden hose connector

(3) With the engine off, turn on the water

supply and let the water flush through
the cooling water passages for about 15
minutes.

(4) Turn off the water supply, and then dis-

connect the garden hose from the gar­den hose connector.

(5) Connect the garden hose connector to

the fitting on the bottom cowling and
tighten it securely. NOTICE: If the gar-

den hose connector is not properly
connected, cooling water can leak out
and the engine can overheat during
operation.

[ECM01802]

1. Fitting

2. Garden hose connector

(2) Connect the garden hose to the garden

hose connector.

When flushing the cooling water passages
with the boat in the water, tilting the outboard
motor up until it is completely out of the water
will achieve better results.

EMU44342

Cleaning the outboard motor

When cleaning the outboard motor, the top
cowling must be installed.
(1) Wash the exterior of the outboard motor

using fresh water. NOTICE: Do not

spray water into the air intake.

[ECM01841]

69

Maintenance

1

1. Air intake

(2) Drain the cooling water completely out of

the outboard motor. Clean the body
thoroughly.

EMU28463

Checking painted surface of outboard
motor

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

EMU2847G

Periodic maintenance

EWM01872

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

and engine shut-off cord (lanyard) with
you when you perform maintenance un­less otherwise specified.

 The power trim and tilt switches operate

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

 Allow the engine to cool before handling

hot parts or fluids.

 Always completely reassemble the mo-

tor before operation.

EMU28512

Replacement parts

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

EMU34152

Severe operating conditions

Severe operating conditions involve one or
more of the following types of operation on a
regular basis:
 Operating continuously at or near maxi-

mum engine speed (rpm) for many hours

 Operating continuously at a low engine

speed (rpm) for many hours

 Operating without sufficient time for engine

to warm up and cool down

 Frequent quick acceleration and decelera-

tion

 Frequent shifting
 Frequently starting and stopping the en-

gine(s)

 Operation that fluctuates often between

light and heavy cargo loads

70

Maintenance

TIP:

Outboard motors operating under any of
these above conditions require more fre­quent maintenance. Yamaha recommends
that you do this service twice as often as

ample, if a particular service should be done
at 50 hours, do it instead at 25 hours. This will
help prevent more rapid deterioration of en­gine components.

specified in the maintenance chart. For ex-

EMU46073

Maintenance chart 1

 Refer to the sections in this chapter for explanations of each owner-specific action.
 The maintenance cycle on these charts assume usage of 100 hours per year and regular

flushing of the cooling water passages. Maintenance frequency should be adjusted when
operating the engine under adverse conditions such as extended trolling.

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

checks.

 Expendable or consumable parts and lubricants will lose their effectiveness over time and

through normal usage regardless of the warranty period.

 When operating in salt water, muddy, other turbid (cloudy), acidic water, the engine should

be flushed with clean water after each use.
The “ ” symbol indicates the check-ups which you may carry out yourself.
The “ ” symbol indicates work to be carried out by your Yamaha dealer.

Initial Every

Item Actions

Anode(s) (external)

Anode(s) (internal)
*1

Anode(s) (internal)
*2

Battery (electro­lyte level, terminal)

Battery (electro­lyte level, terminal)

Cooling water
leakage

Cowling lock lever Inspection 45, 47

Engine starting
condition/noise

Inspection or re­placement as nec­essary

Inspection or re­placement as nec­essary

Replacement —

Inspection 85

Fill, charging or re­placing as neces­sary

Inspection or re­placement as nec­essary

Inspection 51

20 hours

(3

months)

100 hours

(1 year)

300 hours

(3 years)

500 hours

(5 years)

Page

84

—

—

—

71

Maintenance

Initial Every

Item Actions

Engine idle
speed/noise

Engine oil Replacement 77

Engine oil filter
(cartridge)

Fuel filter (can be
disassembled)

Fuel line (High
pressure)

Fuel line (High
pressure)

Fuel line (Low
pressure)

Fuel line (Low
pressure)

Fuel pump

Fuel/engine oil
leakage

Gear oil Replacement 83

Greasing points Greasing 75

Clamp bracket bolt
(through tube)

Impeller/water
pump housing

Impeller/water
pump housing

Power trim and tilt
unit

Propeller/propeller
nut/cotter pin

PCV (Pressure
Control Valve)

Shift link/shift ca­ble

Inspection 77

Replacement 79

Inspection or re­placement as nec­essary

Inspection —

Inspection or re­placement as nec­essary

Inspection —

Inspection or re­placement as nec­essary

Inspection or re­placement as nec­essary

Inspection —

Inspection and
greasing

Inspection or re­placement as nec­essary

Replacement —

Inspection 48

Inspection or re­placement as nec­essary

Inspection or re­placement as nec­essary

Inspection, adjust­ment or replace­ment as necessary

20 hours

(3

months)

100 hours

(1 year)

300 hours

(3 years)

500 hours

(5 years)

Page

46

—

—

—

—

—

81

—

—

72

Maintenance

Initial Every

Item Actions

Spark plug(s)

Spark plug
caps/spark plug
wires

Shift Dampener
System (SDS) pro­peller damper

Water from the
cooling water pilot
hole

Throttle link/throt­tle cable

Thermostat

Timing belt

Valve clearance

Cooling water inlet Inspection 18

Main switch/stop
switch

Wire harness con­nections/wire cou­pler connections

(Yamaha) Me­ter/gauge

Fuel tank (Yamaha
portable tank)

EMU47020

Inspection or re­placement as nec­essary

Inspection or re­placement as nec­essary

Inspection or re­placement

Inspection 55

Inspection, adjust­ment or replace­ment as necessary

Inspection or re­placement as nec­essary

Inspection or re­placement as nec­essary

Inspection and ad­justment

Inspection or re­placement as nec­essary

Inspection or re­placement as nec­essary

Inspection —

Inspection and
cleaning as neces­sary

20 hours

(3

months)

100 hours

(1 year)

300 hours

(3 years)

500 hours

(5 years)

Page

76

—

—

—

—

—

—

—

—

—

*1 cylinder head, cylinder block
*2 cylinder head, cylinder block, fuel cooler, exhaust guide

73

Maintenance

EMU46082

Maintenance chart 2

Item Actions

Exhaust guide/ex­haust manifold

Timing belt Replacement —

Inspection or re­placement as nec­essary

Every

1000 hours

Page

—

74

EMU46621

ZMU08696

Greasing

Yamalube grease A “ ” (water resistant grease)
Yamaha grease D “ ” (corrosion resistant grease)

Maintenance

75

Maintenance

1

3

1

3

2

ZMU08699

11

22

33

EMU47032

Inspecting spark plug

The spark plug is an important engine com­ponent. 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 check the spark plug
because heat and deposits will cause the
spark plug to slowly break down and erode.
To remove the spark plug
(1) Remove the spark plug wire from the

holder.

To check the spark plug
(1) Check the condition of the spark plug. If

electrode erosion becomes excessive or
carbon and other deposits are exces­sive, replace the spark plug with the
specified plug.

Standard spark plug:

LKR6E-9N

(2) Measure the spark plug gap using a

thickness gauge. If the spark plug gap is
out of specification, replace the spark
plug with the specified plug.

1. Spark plug wire

2. Holder

3. Spark plug cap

(2) Remove the spark plug cap from the

spark plug.

(3) Remove the spark plug. WARNING!

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.

[EWM00562]

76

1. Spark plug gap

2. Spark plug part number

3. Spark plug I.D. mark (NGK)

Spark plug gap:

0.8–0.9 mm (0.031–0.035 in)

Maintenance

TIP:

To install the spark plug
(1) Wipe off any dirt from the threads, insu-

lator, and gasket surface of the spark
plug.

(2) Install the spark plug, and then tighten it

to the specified torque.

Spark plug tightening torque:

25 N·m (2.5 kgf·m, 18 lb·ft)

If a torque-wrench is not available when you
are reinstalling a spark plug, a good estimate
of the correct torque is 1/12 turn past finger­tight. When you are installing a new spark
plug, a good estimate of the correct torque is
1/2 turn past finger-tight.
(3) Install the spark plug cap.
(4) Fit the spark plug wire to the holder.

EMU29045

Inspecting idle speed

EWM00452

 Do not touch or remove electrical parts

when starting or during operation.
 Keep hands, hair, and clothes away

from the flywheel and other rotating

parts while the engine is running.

ECM00491

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

If the boat is not equipped with a tachometer
for the outboard motor, use a diagnostic ta­chometer for this procedure. Results may
vary depending on whether testing is con­ducted with the flushing attachment, in a test
tank, or with the outboard motor in the water.

(1) Start the engine and allow it to warm up

fully in neutral until it is running smoothly.

(2) Once the engine has warmed up, verify

whether the idle speed is set to specifi­cation. For idle speed specifications, see
page 11. If you have difficulty verifying
the idle speed, or the idle speed requires
adjustment, consult a Yamaha dealer or
other qualified mechanic.

EMU38808

Changing engine oil

EWM00761

 Avoid draining the engine oil immediate-

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

 Be sure the outboard motor is securely

fastened to the transom or a stable
stand.

ECM01711

Change the engine oil after the first 20
hours of operation or 3 months, and every
100 hours or at 1-year intervals thereafter.
Otherwise the engine will wear quickly.

To prevent spilling oil where it could cause
damage to nature, it is strongly recommend­ed that you use an oil changer to change the
engine oil. If an oil changer is not available,
drain the engine oil by removing the drain
screw. If you are not familiar with the proce­dure for changing the engine oil, consult your
Yamaha dealer.
(1) Put the outboard motor in an upright po-

sition (not tilted). NOTICE: If the out-

board motor is not level, the oil level
indicated on the oil dipstick may not
be accurate.

[ECM01862]

77

Maintenance

TIP:

TIP:

TIP:

ZMU08105

1

1

2

1

(2) Start the engine. Warm it up and keep

the idle speed for 5-10 minutes.

(3) Stop the engine and leave it for 5-10 min-

utes.
(4) Remove the top cowling.
(5) Remove the oil filler cap. Pull out the dip-

stick and use the oil changer to extract

the oil completely.

When using an oil changer, skip steps 6 and

7.
(6) Prepare a suitable container that holds a

larger amount than the engine oil capac­ity. Remove the drain screw and gasket
while holding the container under the
drain hole. Let the oil drain completely.
Wipe up any spilled oil immediately.

1. Drain screw

2. Gasket

1. Oil filler cap

1. Oil changer

78

If the oil does not drain easily, change the tilt
angle or turn the outboard motor to port and
starboard to drain the oil.
(7) Put a new gasket on the oil drain screw.

Apply a light coat of oil to the gasket and
install the drain screw.

Drain screw tightening torque:

27 N·m (2.7 kgf·m, 20 lb·ft)

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

Maintenance

TIP:

1

3 2

(8) Add the correct amount of oil through the

filler hole. Put back the filler cap and the

dipstick. NOTICE: Overfilling the oil

could cause leakage or damage. If the

oil level is above the upper level mark,

drain until the level meets the speci-

fied capacity.

[ECM01851]

Recommended engine oil:

YAMALUBE 4 or 4-stroke outboard
motor oil
Engine oil quantity (without oil filter
replacement):

3.0 L (3.17 US qt, 2.64 Imp.qt)
Engine oil quantity (with oil filter re­placement):

3.2 L (3.38 US qt, 2.82 Imp.qt)

(9) Leave the outboard motor for 5-10 min-

utes.

(10) Remove the oil dipstick and wipe it

clean.

(11) Insert the dipstick and remove it again.

Be sure to completely insert the dipstick
into the dipstick guide, otherwise the oil
level measurement will be incorrect.

(12) Recheck the oil level using the dipstick to

be sure the level falls between the upper
and lower marks. Consult your Yamaha
dealer if the oil level is out of specified
level.

(13) Start the engine and make sure that the

low oil pressure-alert indicator remains
off. Also, make sure that there are no oil
leaks. NOTICE: If the low oil pressure-

alert indicator comes on or if there are
oil leaks, stop the engine and find the
cause. Continued operation with a
problem could cause severe engine
damage. Consult your Yamaha dealer
if the problem cannot be located and
corrected.

[ECM01623]

(14) Install the top cowling.
(15) Dispose of used oil according to local

regulations.

 For more information on the disposal of

used oil, consult your Yamaha dealer.

 Change the oil more often when operating

the engine under adverse conditions such
as extended trolling.

EMU48110

Replacing the engine oil filter

EWM00761

 Avoid draining the engine oil immediate-

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

 Be sure the outboard motor is securely

fastened to the transom or a stable
stand.

1. Oil dipstick

2. Upper mark

3. Lower mark

Yamaha recommends you to have a Yamaha
dealer replace the engine oil filter.
If you perform replacement yourself, follow
the procedure below. If you have any ques­tions, please consult a Yamaha dealer.
(1) Drain the engine oil. For further informa-

tion, see page 77.

(2) Place a cloth under the engine oil filter.

79

Maintenance

TIP:

1

(3) Turn the engine oil filter counterclock-

wise and remove it.

Engine oil filter:

18 N·m (1.8 kgf·m, 13 lb·ft)

 Wipe up any spilled engine oil.
 Dispose of the removed engine oil filter in

accordance with local regulations.

(4) Apply engine oil to the O-ring of the en-

gine oil filter.

1. O-ring

(5) Turn the engine oil filter clockwise and

tighten it to the specified torque.

(6) Fill up the engine with engine oil. For fur-

ther information, see page 77.

EMU48060

Why Yamalube

YAMALUBE oil is a Genuine YAMAHA Part
born of the engineers’ passion and belief that
engine oil is an important liquid engine com­ponent. We form teams of specialists in the
fields of mechanical engineering, chemistry,
electronics and track testing, and have them
develop the engine together with the oil it will
use. Yamalube oils take full advantage of the
base oil’s qualities and blend in the ideal bal­ance of additives to make sure the final oil
clears our performance standards. Thus,
Yamalube mineral, semisynthetic and syn­thetic oils have their own distinct characters
and value. Yamaha’s experience gained over
many years of research and development
into oil since the 1960’s helps make
Yamalube the best choice for your Yamaha
engine.

80

EMU29116

ZMU08702

ZMU08110

Inspecting wiring and connectors

 Inspect that each connector is engaged se-

curely.

 Inspect that each ground lead is properly

secured.

Maintenance

EMU32113

Checking propeller

EWM01882

You could be seriously injured if the en­gine accidentally starts when you are near
the propeller. Before inspecting, remov­ing, or installing the propeller, place the
shift control in neutral, turn the main
switch to “ ” (off) and remove the key,
and remove the clip from the engine shut­off switch. Turn off the battery cut-off
switch if your boat has one.

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

81

Maintenance

ZMU07854

ZMU08131

3

2

1

5

6

4

Checkpoints
 Check each of the propeller blades for ero-

sion from cavitation or ventilation, or other
damage.

 Check the propeller shaft for damage.
 Check the splines for wear or damage.
 Check for fish line tangled around the pro-

peller shaft.

 Check the propeller shaft oil seal for dam-

age.

EMU30663

Removing propeller

EMU29198

Spline models

(1) Straighten the cotter pin and pull it out

using a pair of pliers.

(2) Remove the propeller nut, washer, and

spacer (if equipped). WARNING! Do not

use your hand to hold the propeller
when loosening the propeller nut.

[EWM01891]

1. Cotter pin

2. Propeller nut

3. Washer

4. Spacer

5. Propeller

6. Thrust washer

(3) Remove the propeller, washer (if

equipped), and thrust washer.

EMU30673

Installing propeller

EMU29237

Spline models

ECM00502

Make 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 a corro-

sion resistant grease to the propeller
shaft.

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

washer, washer (if equipped), and pro­peller on the propeller shaft. NOTICE:

Make sure to install the thrust washer
before installing the propeller. Other­wise, the lower case and propeller
boss could be damaged.

(3) Install the spacer (if equipped) and the

washer. Tighten the propeller nut to the
specified torque.

[ECM01882]

82

TIP:

1. Cotter pin

3

2

1

5

6

4

1

ZMU06956

1

2

2. Propeller nut

3. Washer

4. Spacer

5. Propeller

6. Thrust washer

Propeller nut tightening torque:

54 N·m (5.4 kgf·m, 40 lb·ft)

(4) Align the propeller nut with the propeller

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

NOTICE: Do not reuse the cotter pin.
Otherwise, the propeller can come off
during operation.

[ECM01892]

Maintenance

EMU47100

Changing gear oil

EWM00801

 Be sure the outboard motor is securely

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

 Never get under the lower unit while it is

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

(1) Tilt the outboard motor so that the gear

oil drain screw is at the lowest point pos­sible.

(2) Place a suitable container under the gear

case.

(3) Remove the gear oil drain screw and

gasket. The screw is magnetic so a small
quantity of metal particles on the end of
the screw is normal. Simply remove
them. NOTICE: If there is an excessive

quantity of metal particles on the
magnetic gear oil drain screw, this
can indicate lower unit problem. Con­sult your Yamaha dealer.

[ECM01901]

1. Cotter pin

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

1. Gear oil drain screw

2. Gasket

83

Maintenance

TIP:

TIP:

TIP:

TIP:

1

2

ZMU08122

Always use new gaskets. Do not reuse the re­moved gaskets.
(4) Remove the oil level plug and gasket to

allow the oil to drain completely.

NOTICE: Check the used gear oil after
it has been drained. If the gear oil is
milky or contains water or a large
amount of metal particles, the gear
case may be damaged. Have a
Yamaha dealer check and repair the
outboard motor.

1. Gasket

2. Oil level plug

[ECM00714]

(6) Put a new gasket on the oil level plug.

When the oil begins to flow out of the oil
level plug hole, insert and tighten the oil
level plug to the specified torque.

Apply a light coat of gear oil to the oil level
plug thread and gasket before installation.

Tightening torque:

7 N·m (0.7 kgf·m, 5.2 lb·ft)

(7) Put a new gasket on the gear oil drain

screw. Insert and tighten the gear oil
drain screw to the specified torque.

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

tion. Using a flexible or pressurized filling
device, inject the gear oil into the gear oil
drain screw hole.

Recommended gear oil:

YAMALUBE outboard gear oil or Hyp­oid gear oil

Recommended gear oil grade:

SAE 90 API GL-4 / SAE 80W API GL­5 / SAE 90 API GL-5

Gear oil quantity:

0.760 L (0.803 US qt, 0.669 Imp.qt)

84

Apply a light coat of gear oil to the gear oil
drain screw thread and gasket before instal­lation.

Tightening torque:

7 N·m (0.7 kgf·m, 5.2 lb·ft)

EMU29318

Inspecting and replacing anode(s)

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

Maintenance

TIP:

1

1

ECM00721

Do not paint anodes, as this would render
them ineffective.

 Wear protective eye gear and rubber

gloves.

 Do not smoke or bring any other source

of ignition near the battery.

The procedure for checking the battery varies
for different batteries. This procedure con­tains typical checks that apply to many bat­teries, but you should always refer to the
battery manufacturer’s instructions.

ECM01921

A poorly maintained battery will quickly
deteriorate.

(1) Check the electrolyte level.

1. Anode

Inspect ground leads attached to external an­odes on equipped models. Consult a
Yamaha dealer for inspection and replace­ment of internal anodes attached to the pow­er unit.

EMU29324

Checking battery (for electric start
models)

EWM01903

Battery electrolyte is poisonous and caus­tic, and batteries generate explosive hy­drogen gas. When working near the
battery:

(2) Check the battery’s charge. If your boat

is equipped with the digital speedome­ter, the voltmeter and low battery alert
functions will help you monitor the bat­tery’s charge. If the battery needs charg­ing, consult your Yamaha dealer.

(3) Check the battery connections. They

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

connections can produce shorting or
arcing and cause an explosion.

[EWM01913]

85

Maintenance

ZMU01811

1

2

3

EMU29335

Connecting the battery

EWM00573

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

ECM01125

Do not reverse the battery cables. Other­wise, the electrical parts could be dam­aged.

(1) Make sure the main switch (on applica-

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

(2) Connect the red battery cable to the

POSITIVE (+) terminal first. Then connect
the black battery cable to the NEGATIVE
(-) terminal.

EMU29372

Disconnecting the battery

(1) Turn off the battery cut-off switch (if

equipped) and main switch. NOTICE: If

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

(2) Disconnect the negative cable(s) from

the negative (-) terminal. NOTICE: Al-

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

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

move the battery from the boat.

(4) Clean, maintain, and store the battery

according to the manufacturer’s instruc­tions.

[ECM01931]

[ECM01941]

1. Red cable

2. Black cable

3. Battery

(3) The electrical contacts of the battery and

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

86

Trouble Recovery

EMU47140

Troubleshooting

This section describes the likely causes and
remedies for problems, such as those in the
fuel, compression, and ignition systems, poor
starting, and loss of power. Please note that
all of the items in this section may not apply
to your model.
If your outboard motor requires repair, bring
it to a Yamaha dealer.
If the engine trouble-alert indicator is blinking,
consult your Yamaha dealer.

Starter will not operate.

Q. Is remote control lever in gear?
A. Shift to neutral.

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

Q. Are battery connections corroded or
loose?
A. Tighten battery cables and clean battery
terminals.

Q. Is fuse for starter relay or electric circuit
blown?
A. Check for cause of electric overload and
repair. Replace fuse with one of correct am­perage.

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

Engine will not start (starter operates).

Q. Is clip on engine shut-off cord (lanyard) in­stalled?
A. Install clip to engine shut-off switch.

A. Fill tank with clean, fresh fuel.

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

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

Q. Is starting procedure incorrect?
A. See page 52.

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

Q. Are spark plugs fouled or of incorrect
type?
A. Inspect spark plugs. Clean or replace with
recommended type.

Q. Are spark plug caps fitted incorrectly?
A. Check and re-fit caps.

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

Q. Is ignition wiring damaged or poorly con­nected?
A. Inspect wires for breaks and wear. Have
connections tightened and broken or worn
wires replaced by a Yamaha dealer.

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

Engine idles irregularly or stalls.

Q. Are spark plugs fouled or of incorrect
type?
A. Inspect spark plugs. Clean or replace with
recommended type.

Q. Is fuel tank empty?

Q. Is fuel system clogged?

87

Trouble Recovery

A. Inspect for pinched or kinked fuel line or
other obstructions in fuel system.

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

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

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

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

Q. Is spark plug gap incorrect?
A. Replace spark plug.

Q. Is ignition wiring damaged or poorly con­nected?
A. Inspect wires for breaks and wear. Have
connections tightened and broken or worn
wires replaced by a Yamaha dealer.

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

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

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

Q. Is fuel tank air vent restricted or clogged?
A. Remove obstruction.

Q. Is outboard motor angle too high?
A. Return to normal operating position.

Q. Is fuel joint connection incorrect?

A. Connect correctly.

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

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

Alert buzzer sounds or indicator lights.

Q. Is cooling system clogged?
A. Inspect cooling water inlet for obstruc­tions.

Q. Is low oil pressure-alert indicator on or
blinking?
A. Have serviced by a Yamaha dealer.

Q. Is heat range of spark plugs incorrect?
A. Inspect spark plugs and replace with rec­ommended type.

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

Q. Is engine oil contaminated or deteriorat­ed?
A. Replace engine oil with specified type.

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

Q. Is oil pump malfunctioning?
A. Have serviced by a Yamaha dealer.

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

Q. Is thermostat or water pump malfunction­ing?

88

Trouble Recovery

A. Have serviced by a Yamaha dealer.

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

Engine power loss.

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

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

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

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

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

Q. Are spark plugs fouled or of incorrect
type?
A. Inspect spark plugs. Clean or replace with
recommended type.

Q. Are weeds or other foreign material tan­gled on gear housing?
A. Remove foreign material and clean lower
unit.

A. Clean or replace fuel filter.

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

Q. Is spark plug gap incorrect?
A. Replace spark plug.

Q. Is ignition wiring damaged or poorly con­nected?
A. Inspect wires for breaks and wear. Have
connections tightened and broken or worn
wires replaced by a Yamaha dealer.

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

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

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

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

Q. Is fuel tank air vent restricted or clogged?
A. Remove obstruction.

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

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

Q. Is fuel system clogged?
A. Inspect for pinched or kinked fuel line or
other obstructions in fuel system.

Q. Is fuel filter clogged?

Q. Is heat range of spark plugs incorrect?
A. Inspect spark plugs and replace with rec­ommended type.

Q. Is engine not responding properly to re­mote control lever position?

89

Trouble Recovery

A. Have serviced by a Yamaha dealer.

Engine vibrates excessively.

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

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

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

Q. Are outboard motor mounting bolts loose?
A. Tighten bolts or have serviced by a
Yamaha dealer.

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

EMU29435

Temporary action in emergen-

cy

EMU29442

Impact damage

EWM00871

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 an object in the wa­ter, follow the procedure below.

(1) Stop the engine immediately.
(2) Check the control system and all compo-

nents for damage. Also, check the boat
for damage.

(3) Whether damage is found or not, return

to the nearest harbor slowly and careful­ly.

(4) Have a Yamaha dealer check the out-

board motor before operating it again.

EMU46603

Replacing fuse

EWM00632

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

If a fuse has blown, replace the fuse accord­ing to the following procedure.
(1) Turn the main switch to the “ ” (off)

position.
(2) Remove the fuse box cover.
(3) Remove the fuse with a fuse puller, and

then replace it with a spare one of the

proper amperage.

90

1. Fuse box cover

1

76

5
4
3

8

2

ZMU08320

1

1

2. Fuse puller

3. Engine control unit / ignition coil / electric
fuel pump / fuel injector / vapor shut-off
valve fuse (20 A)

4. Main switch / PTT switch fuse (20 A)

5. Starter relay fuse (30 A)

6. Spare engine main fuse (50 A)

7. Engine main fuse (50 A)

8. Spare fuse (20 A, 30 A)

Trouble Recovery

If the outboard motor cannot be tilted
up/down using the power trim and tilt unit,
e.g. because of a discharged battery or a fail­ure with the unit itself, the outboard motor
can be tilted manually.
(1) Stop the engine.
(2) Loosen the manual valve screw by turn-

ing it counterclockwise until it stops.

1. Manual valve screw

(3) Adjust the outboard motor to a navigable

angle, tighten the manual valve screw
clockwise, and secure the outboard mo­tor.

1. Fuse puller

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

EMU29529

Power trim and tilt will not operate

EWM02331

Never get under the engine while it is tilt­ed. Severe injury could occur if the out­board motor accidentally falls.

EMU47040

Water separator-alert is activated af­ter leaving port

EWM01501

Gasoline is highly flammable, and its va­pors are flammable and explosive.
 Do not perform this procedure on a hot

or running engine. Allow the engine to
cool.

 There will be fuel in the fuel filter. Keep

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

 This procedure will allow some fuel to

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

91

Trouble Recovery

TIP:

1

ZMU05441

ZMU01758

ZMU07012

1

2

 The fuel filter must be reassembled

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

If the water separator-alert indicator blinks or
the buzzer sounds intermittently, perform the
following procedure.

The buzzer sounds only when the remote
control lever is placed in neutral.

1. Water separator-alert indicator

(1) Stop the engine.
(2) Remove the top cowling.
(3) Remove the water detection switch lead

from the holder.

92

1. Holder

2. Water detection switch coupler

(4) Disconnect the water detection switch

coupler. NOTICE: Be careful not to get

any water on the water detection
switch coupler, otherwise a malfunc­tion could occur.

[ECM01951]

Trouble Recovery

1

1

2

3

(5) Remove the fuel filter from its holder.

1. Fuel filter

(6) Unscrew the filter cup, and then remove

the O-ring from the filter cup. NOTICE:

Be careful not to twist the water de­tection switch lead when unscrewing
the filter cup.

[ECM01961]

(11) Fasten the water detection switch lead

with the holder.
(12) Install the top cowling.
(13) Turn the main switch to the “ ” (on) po-

sition and check that the water separa-

tor-alert indicator remains off and the

buzzer does not sound. If the water sep-

arator-alert indicator blinks or the buzzer

sounds, have your Yamaha dealer check

the outboard motor. NOTICE: Although

the buzzer will stop when the engine is

started and the remote control lever is

moved to the forward or reverse posi-

tion, do not use the outboard motor.

Otherwise, serious engine damage

could occur.

EMU33502

[ECM02391]

Treatment of submerged motor

If the outboard motor is submerged, immedi­ately take it to a Yamaha dealer. Otherwise
some corrosion may begin almost immedi­ately. NOTICE: Do not attempt to run the

outboard motor until it has been com­pletely inspected.

[ECM00402]

1. O-ring

2. Filter cup

3. Water detection switch lead

(7) Drain the water in the filter cup by soak-

ing it up with a rag.

(8) Put the O-ring on the filter cup in its orig-

inal position, and then install the filter cup
onto the filter housing. NOTICE: Be

careful not to twist the water detec­tion switch lead when screwing the fil­ter cup onto the filter housing.

(9) Fit the fuel filter into its holder.
(10) Connect the water detection switch cou-

pler securely until a click is heard.

[ECM01971]

93

INDEX

6Y8 Multifunction meters...................... 35

A

Alcohol and drugs...................................2

Alert indicator ....................................... 30

Alert system.......................................... 39

Anode(s), inspecting and replacing ...... 84

Anti-fouling paint .................................. 15

Approval label of emission control

certificate............................................16

Avoid collisions.......................................3

B

Battery ..................................................48

Battery, checking

(electric start models) ......................... 85

Battery, connecting .............................. 86

Battery, disconnecting.......................... 86

Battery requirements............................12

Boat horsepower rating........................ 12

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

Boating safety publications .................... 4

Breaking in engine................................ 44

C

Carbon monoxide................................... 2

CE Marking / UKCA Marking.................. 5

Checks after engine warm up............... 55

Checks after starting engine................. 55

Checks before starting engine.............. 45

Cleaning the outboard motor ............... 69

Clock .................................................... 34

Collisions with floating or submerged

objects.................................................. 3

Compliance mark label........................... 6

Components diagram........................... 18

Control functions, checking.................. 46

Cooling water ....................................... 55

Cowling, installing................................. 47

Cowling lock lever ................................ 29

Cruising in salt water or other

conditions...........................................65

D

Digital speedometer..............................33

Digital tachometer ................................31

Draining the gasoline from the vapor

separator ............................................ 68

E

EC Declaration of Conformity (DoC)....... 5

Electric shock ......................................... 1

Emergency equipment..........................15

Emergency, temporary action in........... 90

Emission control information................ 15

Engine data recording ............................9

Engine oil .............................................. 46

Engine oil, changing .............................77

Engine oil, filling.................................... 44

Engine oil requirements........................ 13

Engine shut-off cord (lanyard) .......... 1, 46

Engine shut-off cord (lanyard) and

clip...................................................... 25

Engine stop button ............................... 26

F

Filling fuel..............................................49

First-time operation ..............................44

Flushing cooling water passage ........... 69

Flushing device............................... 29, 47

Flushing with the flushing

attachment .........................................67

Free accelerator....................................23

Fuel filter ............................................... 30

Fuel filter, checking............................... 46

Fuel gauge ............................................ 33

Fuel leaks, checking for........................ 45

Fuel level...............................................45

Fuel level-alert indicator ....................... 34

Fuel requirements................................. 14

Fuel system...........................................45

Fuel tank (portable fuel tank) ................ 20

Fuse, replacing ..................................... 90

G

Gasoline............................................2, 14

Gasoline exposure and spills.................. 2

94