Yamaha F6D (2022), FT8G (2022), F8F (2022) User guide

OWNER’S MANUAL

Read this manual carefully before operating this

outboard motor.

F6D
F8F
FT8G

6FW-28199-76-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 F6DMH, F6DM, F8FMH, F8FE, FT8GMH,
FT8GE, FT8GEP 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

F6D, F8F, FT8G

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 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 .......... 6

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

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

Specifications and requirements... 11

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

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

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

Mounting outboard motor................ 13

Remote control requirements ....... 13

Battery requirements .................... 13

Battery specifications....................... 13

To use the battery ............................ 13

Propeller selection ........................ 14

Start-in-gear protection ................ 14

Engine oil requirements ................ 14

Fuel requirements ......................... 15

Gasoline ........................................... 15

Muddy or acidic water .................. 16

Anti-fouling paint .......................... 16

Outboard motor disposal

requirements.............................. 16

Emergency equipment.................. 16

Components .................................... 17

Components diagram ................... 17

Fuel tank........................................... 19

Fuel joint........................................... 20

Fuel tank cap.................................... 20

Air vent screw................................... 20

Remote control box.......................... 20

Remote control lever........................ 20

Neutral interlock trigger.................... 21

Neutral throttle lever......................... 21

Choke switch.................................... 21

Tiller handle ..................................... 21

Gear shift lever ................................ 21

Throttle grip ..................................... 22

Throttle indicator ............................. 22

Throttle friction adjuster ................... 22

Engine shut-off cord (lanyard) and

clip ................................................ 23

Engine stop button .......................... 23

Pull-type choke knob ....................... 24

Manual starter handle....................... 24

Main switch ...................................... 24

Power tilt switch............................... 24

Steering friction adjuster .................. 25

Trim rod (tilt pin) ............................... 25

Tilt lock mechanism ......................... 26

Tilt support knob .............................. 26

Tilt support bar................................. 26

Power tilt unit ................................... 26

Table of contents

Cowling lock lever............................ 27

Flushing device ................................ 27

Alert indicator .................................. 27

Instruments and indicators ............28

Indicators ..................................... 28

Low oil pressure-alert indicator........ 28

Engine control system .................... 29

Alert system .................................. 29

Low oil pressure alert....................... 29

Installation ....................................... 30

Installation ..................................... 30

Mounting the outboard motor.......... 30

Clamping the outboard motor.......... 32

Operation ......................................... 33

First-time operation....................... 33

Fill engine oil .................................... 33

Breaking in engine............................ 33

Getting to know your boat ............... 33

Checks before starting engine ...... 34

Fuel level .......................................... 34

Removing top cowling ..................... 34

Fuel system...................................... 34

Controls............................................ 34

Engine shut-off cord (lanyard).......... 35

Engine oil.......................................... 35

Outboard motor ............................... 35

Flushing device ................................ 36

Install top cowling ............................ 36

Checking power tilt system.............. 37

Battery.............................................. 37

Filling fuel ..................................... 37

Operating engine........................... 38

Sending fuel (portable tank) ............. 38

Starting engine................................. 39

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

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

Warming up engine ....................... 46

Manual start and electric start

models .......................................... 46

Checks after engine warm up ....... 46

Shifting ............................................. 46

Stop switches................................... 46

Shifting.......................................... 46

Stopping boat ............................... 48

Stopping engine............................ 48

Procedure......................................... 48

Procedure......................................... 49

Trimming outboard motor............. 49

Adjusting trim angle for manual tilt

models .......................................... 50

Adjusting trim angle (power tilt

models) ......................................... 50

Adjusting boat trim........................... 51

Tilting up and down ...................... 52

Procedure for tilting up (manual tilt

models) ......................................... 52

Procedure for tilting up (power tilt

models) ......................................... 53

Procedure for tilting down (manual

tilt models) .................................... 54

Procedure for tilting down (power

tilt models) .................................... 54

Shallow water .............................. 55

Cruising in shallow water (manual

tilt models) .................................... 55

Power tilt models.............................. 56

Cruising in other conditions.......... 57

Maintenance.................................... 58

Transporting and storing

outboard motor.......................... 58

Dismounting the outboard motor..... 58

Storing outboard motor.................... 60

Procedure......................................... 60

Lubrication ....................................... 62

Flushing power unit.......................... 62

Cleaning the outboard motor........... 63

Checking painted surface of

outboard motor............................. 63

Periodic maintenance ................... 63

Replacement parts........................... 63

Severe operating conditions ............ 64

Maintenance chart 1......................... 65

Table of contents

Maintenance chart 2 ........................ 67

Greasing........................................... 68

Cleaning and adjusting spark plug... 69

Checking fuel filter ........................... 70

Inspecting idle speed....................... 70

Changing engine oil.......................... 70

Why Yamalube ................................. 72

Inspecting wiring and connectors.... 73

Checking propeller........................... 73

Removing propeller.......................... 73

Installing propeller............................ 74

Changing gear oil ............................. 76

Inspecting and replacing anode(s) ... 77
Checking battery (for electric start

models) ......................................... 78

Connecting the battery..................... 78

Disconnecting the battery ................ 79

Trouble Recovery ............................ 80

Troubleshooting ............................ 80

Temporary action in emergency ... 83

Impact damage ................................ 83

Replacing fuse ................................. 83

Power tilt will not operate................. 84

Starter will not operate..................... 84

Emergency starting engine .............. 85

Engine fails to operate .................. 86

Emergency engine operation ........... 86

Treatment of submerged motor .... 86

INDEX ............................................... 88

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.

EMU34791

Power 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 tilt mechanism.
The power tilt switches operate even when
the main switch is off. Keep people be 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 or knob 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 38 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

55.
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

EMU25172

ZMU05335

1

ZMU05336

1

3412

ZMU01692

1

ZMU01694

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.

General information

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. Outboard motor serial number location

1. Outboard motor serial number location

1. Key number

EMU38984

EC Declaration of Conformity

(DoC)

This declaration is included with outboard
motors that conform to European regula­tions.

5

General information

1

1

6EE-43394-90

15210026

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.

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.

1. CE marking location

1. CE marking location

6

General information

1

2

3

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.

F6DMH, F6DM, F8FMH, FT8GMH

7

General information

1

2

3

F8FE, FT8GE, FT8GEP

8

General information

6EE-G2794-40

6EE-G2794-50

6EE-H1994-40

6EE-H1994-50

6EE-H1995-40

6EE-H1995-50

ZMU05706

1

2

3

EMU33913

Contents of labels

The above warning labels mean as follows.

1

EWM01692

Emergency starting does not have start­in-gear protection. Ensure shift control is
in neutral before starting engine.

2

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.

3

EWM01672

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

vice (PFD).
 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.

9

General information

ZMU05696

ZMU05664

ZMU05665

ZMU05666

ZMU05667

ZMU05668

EMU33844

Symbols

The following symbols mean as follows.

Notice/Warning

Read Owner’s Manual

Electrical hazard

Remote control lever/gear shift lever operat­ing direction, dual direction

Engine start/ Engine cranking

Hazard caused by continuous rotation

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:

1043 mm (41.1 in) (FT8GMH)
557 mm (21.9 in) (F6DM, F8FE, FT8GE,
FT8GEP)
983 mm (38.7 in) (F6DMH, F8FMH)

Overall width:

333 mm (13.1 in) (F6DM, F8FE, FT8GE,
FT8GEP)
371 mm (14.6 in) (FT8GMH)
373 mm (14.7 in) (F6DMH, F8FMH)

Overall height S:

1008 mm (39.7 in) (F6DM, F6DMH,
F8FMH)

Overall height L:

1135 mm (44.7 in) (F6DM, F6DMH,
F8FE, F8FMH)
1195 mm (47.0 in) (FT8GE, FT8GEP,
FT8GMH)

Overall height X:

1263 mm (49.7 in) (FT8GE, FT8GMH)

Motor transom height S:

431 mm (17.0 in) (F6DM, F6DMH,
F8FMH)

Motor transom height L:

552 mm (21.7 in) (FT8GE, FT8GMH)
557 mm (21.9 in) (FT8GEP)
558 mm (22.0 in) (F6DM, F6DMH, F8FE,
F8FMH)

Motor transom height X:

620 mm (24.4 in) (FT8GE, FT8GMH)

Dry weight (AL) S:

40 kg (88 lb) (F6DM, F6DMH, F8FMH)

Dry weight (AL) L:

41 kg (90 lb) (F6DM, F6DMH, F8FMH)
43 kg (95 lb) (F8FE, FT8GMH)
44 kg (97 lb) (FT8GE)
49 kg (108 lb) (FT8GEP)

Dry weight (AL) X:

44 kg (97 lb) (FT8GMH)
45 kg (99 lb) (FT8GE)

Performance:

Full throttle operating range:

5000–6000 r/min

Rated power:

4.4 kW (6 HP) (F6DM, F6DMH)

5.9 kW (8 HP) (F8FE, F8FMH, FT8GE,
FT8GEP, FT8GMH)

Idle speed (in neutral):

1000–1100 r/min

Power unit:

Type:

4-stroke SOHC L2 4 valves

Total displacement:

212 cm³ (12.9 c.i.)

Bore × stroke:

56.0 × 43.0 mm (2.20 × 1.69 in)

Ignition system:

CDI

Spark plug (NGK):

BR6HS-10

Spark plug gap:

0.9–1.0 mm (0.035–0.039 in)

Steering system:

Remote steering (F6DM, F8FE, FT8GE,
FT8GEP)
Tiller handle (F6DMH, F8FMH,
FT8GMH)

Starting system:

Electric starter (F8FE, FT8GE, FT8GEP)
Manual starter (F6DM, F6DMH, F8FMH,
FT8GMH)

Starting carburetion system:

Choke valve

11

Specifications and requirements

Valve clearance IN (cold engine):

0.15–0.20 mm (0.0059–0.0079 in)

Valve clearance EX (cold engine):

0.20–0.25 mm (0.0079–0.0098 in)

Battery rating (CCA/EN):

347–411 A (F8FE, FT8GE, FT8GEP)

Battery rating (20HR/IEC):

40 Ah (F8FE, FT8GE, FT8GEP)

Maximum generator output:

6 A (F8FE, FT8GE, FT8GEP)

Lower unit:

Gear shift positions:

Forward-neutral-reverse

Gear ratio:

2.08 (27/13) (F6DM, F6DMH, F8FE,
F8FMH)

2.92 (38/13) (FT8GE, FT8GEP,
FT8GMH)

Trim and tilt system:

Manual tilt (F6DM, F6DMH, F8FE,
F8FMH, FT8GE, FT8GMH)
Power tilt (FT8GEP)

Propeller mark:

N (F6DM, F6DMH, F8FE, F8FMH)
R (FT8GE, FT8GEP, FT8GMH)

Fuel and oil:

Recommended fuel:

Regular unleaded gasoline

Min. research octane number (RON):

90

Fuel tank capacity:

12 L (3.17 US gal, 2.64 Imp.gal)

Recommended engine oil:

YAMALUBE 4 or 4-stroke outboard
motor oil

Engine oil quantity:

0.8 L (0.85 US qt, 0.70 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

Gear oil quantity:

0.150 L (0.159 US qt, 0.132 Imp.qt)
(F6DM, F6DMH, F8FE, F8FMH)

0.370 L (0.391 US qt, 0.326 Imp.qt)
(FT8GE, FT8GEP, FT8GMH)

Noise and vibration level:

Operator sound pressure level (ICOMIA
39/94):

78.2 dB(A)

Vibration on tiller handle (ICOMIA 38/94):

7.2 m/s² (F6DMH, F8FMH, FT8GMH)

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.

Recommended engine oil grade 1:

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

12

Specifications and requirements

EMU40491

Mounting outboard motor

EWM02501

 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 30.

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

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.

EMU25733

To use the battery

ECM01091

A battery cannot be connected to models
that do not have a rectifier or Rectifier
Regulator.

If you wish to use a battery, your outboard
motor must be equipped with the following
parts.

 Rectifier or Rectifier Regulator
 Lighting coil

If you do not know if your outboard motor is
equipped with these parts, consult your
Yamaha dealer.
Using maintenance-free sealed batteries or
gel cell batteries is not recommended be­cause they may not be compatible with
Yamaha’s charging system for this outboard
motor.

Battery rating (CCA/EN):

347–411 A (F8FE, FT8GE, FT8GEP)

Battery rating (20HR/IEC):

40 Ah (F8FE, FT8GE, FT8GEP)

13

Specifications and requirements

ZMU04606

-

x

123

ZMU04605

-

x

123

Install an optional Rectifier Regulator or use
accessories rated to withstand 18 volts or
higher with the above models. Consult your
Yamaha dealer for details on installing an op­tional Rectifier Regulator.

EMU34196

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 outboard motor came with a Yamaha
propeller selected to perform well over a
range of applications, but there may be uses
where a different propeller would be more
appropriate.
Your Yamaha dealer can help you select the
right propeller for your boating needs. Select
a propeller that will allow the engine to reach
the middle or upper half of the operating
range at full throttle with the maximum 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.
To check the propeller, see page 73.

1. Propeller diameter in inches

2. Propeller pitch in inches

3. Type of propeller (propeller mark)

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.

EMU39693

Engine oil requirements

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

14

Specifications and requirements

TIP:

ZMU06854

122˚F

50˚C

104

40

86

30

68

SAE API

SE
SF
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 SE/SF/SG/SH/SJ/SL

Recommended engine oil grade 2:

SAE 15W-40/20W-40/20W-50
API SH/SJ/SL

Engine oil quantity:

0.8 L (0.85 US qt, 0.70 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 en-

gine.
 Avoid getting water and contaminants in

the fuel tank. Contaminated fuel can

cause poor performance or engine dam-

age. Use only fresh gasoline that has

been stored in clean containers.

Recommended engine oil grade 2

 This mark identifies the recommended fuel

for this outboard motor as specified by Eu-

ropean regulation (EN228).
 Check that gasoline nozzle has the same

identifier when fueling.

15

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.

16

Components

TIP:

1

8

9

10

2

3

5

6

7

12

11

4

EMU46722

Components diagram

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

F6DMH, F6DM, F8FMH, F8FE

1. Top cowling

2. Clamp bracket

3. Trim rod

4. Anode

5. Drain screw

6. Cooling water inlet

7. Propeller

8. Cowling lock lever

9. Idle hole

10.Anti-cavitation plate

11.Remote control box (side mount type)*

12.Fuel tank

17

Components

1

8

9

10

2

3

5

6

7

12

11

4

4

FT8GMH, FT8GE, FT8GEP

1. Top cowling

2. Clamp bracket

3. Trim rod*

4. Anode

5. Drain screw

6. Cooling water inlet

7. Propeller

8. Cowling lock lever

9. Idle hole

10.Anti-cavitation plate

11.Remote control box (side mount type)*

12.Fuel tank

18

Components

1

10 12 11 13

9

13

2

3

4

5

76

10 11 12

148

1. Manual starter handle*

2. Choke knob*

3. Flushing device

4. Steering friction adjuster*

5. Tilt lock lever*

6. Tilt support knob*

7. Restraint cable attachment

8. Clamp screw

9. Alert indicator

10.Engine stop button*

11.Gear shift lever*

12.Throttle friction adjuster*

13.Throttle grip*

14.Engine shut-off cord (lanyard)

EMU25804

Fuel tank

If your model was equipped with a portable
fuel tank, its function is 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.

19

Components

1

2

3

1
2

3

5

4

6

7

ZMU01723

1

23

44

5

5

6

6

7

7

F

N

R

ZMU01725

1. Fuel joint

2. Fuel tank cap

3. Air vent screw

EMU25831

Fuel joint

This joint is used to connect the fuel line.

EMU25851

Fuel tank cap

This cap seals the fuel tank. When removed,
the tank can be filled with fuel. To remove the
cap, turn it counterclockwise.

EMU25861

Air vent screw

This screw is on the fuel tank cap. To loosen
the screw, turn it counterclockwise.

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.

1. Power tilt switch

2. Remote control lever

3. Neutral interlock trigger

4. Neutral throttle lever

5. Main switch / choke switch

6. Engine shut-off switch

7. Throttle friction adjuster

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.

20

1. Neutral “ ”

2. Forward “ ”

3. Reverse “ ”

4. Shift

5. Fully closed

6. Throttle

7. Fully open

Components

TIP:

1

2

N

ZMU01728

ON

START

OFF

ZMU02206

ZMU07800

EMU26202

Neutral interlock trigger

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

1

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.

EMU26222

Choke switch

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

EMU25914

Tiller handle

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

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.

EMU25925

Gear shift lever

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

21

Components

1

2

3

ZMU05338

1

ZMU05369

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.

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.

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]

22

Components

ZMU05342

ZMU01716

1

2

3

1

2

3

When constant speed is desired, tighten the
adjuster to maintain the desired throttle set­ting.

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
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.

[EWM00123]

1. Engine shut-off cord (lanyard)

2. Clip

3. Engine shut-off switch

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.

23

Components

TIP:

1

ON

STARTOFF

ZMU01718

EMU26015

Pull-type choke knob

Pull the choke knob to supply a rich fuel mix­ture to the engine.

1. Choke knob

EMU26075

Manual starter handle

The manual starter handle is used to crank
and start the engine.

 “” (start)
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.

EMU26103

Power tilt switch

The power tilt system adjusts the outboard
motor angle in relation to the transom. Push­ing the switch “ ” (up) tilts the outboard mo­tor up. Pressing the switch “ ” (down) tilts
the outboard motor down. When the switch is
released, the outboard motor will stop in its
current 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.

24

UP
DN

ZMU01720

For instructions on using the power tilt
switch, see pages 49 and 52.

EMU31433

TIP:

111

1

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
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.

Components

1. Nut

Nut tightening torque:

8 N·m (0.8 kgf·m, 5.9 lb·ft)

 Steering movement is blocked when the

adjuster lever is set to the “A” position.
 Check the tiller handle for smooth move-

ment when the lever is turned to the star-

board side “B”.
 Do not apply lubricants such as grease to

the friction areas of the steering friction ad-

juster.

If the resistance does not increase even when
the lever is turned to the port side “A”, make
sure that the nut is tightened to the specified
torque.

EMU26263

Trim rod (tilt pin)

The position of the trim rod determines the
minimum trim angle of the outboard motor in
relation to the transom.

1. Trim rod

25

Components

1

EMU30531

Tilt lock mechanism

The tilt lock mechanism is used to prevent the
outboard motor from lifting out of the water
when in reverse gear.

1. Tilt lock lever

To lock it, set the tilt lock lever in the lock po­sition. To release, push the tilt lock lever in the
release position.

EMU26323

Tilt support knob

To keep the outboard motor in the tilted up
position, push the tilt support knob under the
swivel bracket.

trailered in the normal running position,
use an additional support device to secure
it in the tilt position.

EMU26334

Tilt support bar

The tilt support bar keeps the outboard motor
in the tilted up position.

ECM01661

Do not use the tilt support bar 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.

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

26

EMU26362

Power tilt unit

This unit tilts the outboard motor up and
down and is controlled with the power tilt
switch.

ECM00631

Do not step on or exert pressure on the
power tilt motor. The power tilt unit could
be damaged as a result.

TIP:

1. Power tilt unit

112121

2

1

ZMU07818

1

1

2. Power tilt motor

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.

EMU39264

Cowling lock lever

The cowling lock lever(s) is used to secure the
top cowling.

Components

EMU26464

Flushing device

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

1. Flushing device

For details on usage, see page 62.

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 29.

1. Cowling lock lever

1. Low oil pressure-alert indicator

27

Instruments and indicators

1

EMU36016

Indicators

EMU36026

Low oil pressure-alert indicator

If oil pressure drops too low, this indicator will
light up. For further information, see page 29.

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 35.

1. Low oil pressure-alert indicator

28

EMU26806

ZMU07904

ZMU02360

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.

EMU26869

Low oil pressure alert

If the oil pressure drops too low, the alert de­vice will activate.
 The engine speed will automatically de-

crease to about 2000–3500 r/min.

 The low oil pressure-alert indicator will light

or blink (if equipped).

Engine control system

 The buzzer will sound (if equipped).

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, consult your Yamaha dealer.

29

Installation

1

2

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.

(3) Hold the handgrip and steering bracket

as shown in the illustration and lift up the
outboard motor using two people.

EMU34802

Mounting the outboard motor

ECM01681

Do not hold the top cowling when mount­ing or dismounting the outboard motor.
The top cowling could come off, causing
the outboard motor to fall.

(1) Be sure to mount the outboard motor

while the boat is on land. If the boat is on
the water, move it to an area on land.

(2) To prevent steering movement, turn the

adjuster lever to “A” (if equipped with the
adjuster lever). To hold the steering
bracket easily, raise the tiller handle to
the vertical position (if equipped with the
tiller handle).

30

1. Steering bracket

2. Handgrip

(4) Mount the outboard motor on the center

TIP:

1

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

1. Center line (keel line)

EMU26926

Mounting height

To run your boat at optimum efficiency, the
water resistance (drag) of the boat and out­board motor must be made as little as possi­ble. The mounting height of the outboard
motor greatly affects the water resistance. If
the mounting height is too high, cavitation
tends to occur, thus reducing the propulsion;
and if the propeller tips cut the air, the engine

Installation

speed will rise abnormally and cause the en­gine to overheat. If the mounting height is too
low, the water resistance will increase and
thereby reduce engine efficiency. Mount the
outboard motor so that the anti-cavitation
plate is between the bottom of the boat and
a level 25 mm (1 in) below it.

ECM01635

 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 ac-

cessories, such as transom ladders or

depth finder transducers) can create air-

borne water spray while the boat is

cruising. If the outboard motor is oper-

ated continuously in the presence of air-

borne water spray, enough water could

enter the engine through the air intake

opening in the top cowling to cause se-

vere engine damage. Remove the cause

of the airborne water spray.

 The optimum mounting height of the out-

board motor is affected by the boat and

motor combination and the desired use.

31

Installation

ZMU02012

ZMU02013

1

ZMU03806

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.

 For instructions on setting the trim angle of

the outboard motor, see page 49.

EMU26974

Clamping the outboard motor

(1) Place the outboard motor on the tran-

som so that it is positioned as close to
the center as possible. Tighten the tran­som clamp screws evenly and securely.
Occasionally check the clamp screws for
tightness during operation of the out­board motor because they could be­come loose due to engine vibration.

WARNING! Loose clamp screws could

allow the outboard motor to fall off or
move on the transom. This could
cause loss of control and serious inju­ry. Make sure the clamp screws are
tightened securely. Occasionally
check the screws for tightness during
operation.

[EWM00643]

the boat. Otherwise the engine could be
completely lost if it accidentally falls off
the transom.

(3) Secure the clamp bracket to the transom

using the bolts provided with the out­board (if packed). For details, consult
your Yamaha dealer. WARNING! Avoid

using bolts, nuts or washers other
than those contained in the engine
packaging. If used, they must be of at
least the same quality of material and
strength and must be tightened se­curely. After tightening, test run the
engine and check their tightness.

[EWM00652]

(2) If the restraint cable attachment is

equipped on your engine, a restraint ca­ble or chain should be used. Attach one
end to the restraint cable attachment and
the other to a secure mounting point on

32

1. Bolts

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 35.

[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

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 49).

33

Operation

1

EMU36414

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.

EMU36561

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, check the fuel lev­el. For fuel filling instructions, see page 37.

EMU39841

Removing top cowling

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

1. Cowling lock lever

EMU36443

Fuel system

EWM00061

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 me-

chanic. 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.

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 re-

turns 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.

34

 Operate the throttle levers several times to

ZMU06873

1

2

1

3 2 1

make sure there is no hesitation in their
travel. Operation should be smooth over
the complete range of motion, and each le­ver should return completely to the idle po­sition.

 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)

Operation

1. Oil dipstick

(3) 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.

(4) Check the oil level using the dipstick to

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

EMU27168

Engine oil

(1) Put the outboard motor in an upright po-

sition (not tilted). NOTICE: If the motor

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

[ECM01791]

(2) Remove oil dipstick and wipe it clean.

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.

35

Operation

123

1

2

1

ZMU07829

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. Fitting

2. Garden hose connector

3. Flushing device

EMU36956

Install top cowling

(1) Be sure that the cowling lock lever is re-

leased.

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

the way around the top 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 lever to lock the

top cowling as shown. NOTICE: If the

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

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.

1. Top cowling

2. Rubber seal

(3) Place the top cowling on the bottom

cowling.

36

Operation

111

ZMU06598

EMU34783

Checking power tilt system

EWM01971

 Never get under the lower unit while it is

tilted, even when the tilt support knob 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 tilt unit for any sign of

oil leaks.

(2) Operate each of the power tilt switches

to check that all switches work.

(3) Tilt the outboard motor up and check

that the tilt rod is pushed out completely.

vide 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.

EMU2743A

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.

1. Tilt rod

(4) Check that the tilt rod is free of corrosion

or other flaws.

(5) Tilt the outboard motor down. Check

that the 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 func­tions will help you monitor the battery’s
charge. A battery in good condition will pro-

(1) Be sure the engine is stopped.
(2) Disconnect the fuel line from the fuel tank

and tighten the air vent screw on the fuel
tank cap.

37

Operation

ZMU04484

(3) Remove the portable tank from the boat.
(4) Be sure you are in a well-ventilated out-

door area, either securely moored or
trailered.

(5) Do not smoke and keep away from

sparks, flames, static electric discharge,
or other sources of ignition.

(6) If you use a portable container to store

and dispense fuel, use only an approved
GASOLINE container.

(7) Touch the fuel nozzle to the filler opening

or funnel to help prevent electrostatic
sparks.

(8) Fill the fuel tank, but do not overfill.

WARNING! Do not overfill. Otherwise

fuel can expand and overflow if the
temperature increases.

Fuel tank capacity:

12 L (3.17 US gal, 2.64 Imp.gal)

[EWM02611]

(10) Wipe up any spilled gasoline immediate-

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

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.
 This product emits exhaust gases which

contain carbon monoxide, a colorless,

odorless gas which could cause brain

damage or death when inhaled. Symp-

toms include nausea, dizziness, and

drowsiness. Keep cockpit and cabin ar-

eas well ventilated. Avoid blocking ex-

haust outlets.

EMU2746B

Sending fuel (portable tank)

(1) If there is an air vent screw on the fuel

tank cap, loosen it 2 or 3 turns.

(9) Tighten the filler cap securely.

38

(2) If there is a fuel joint on the motor, align

TIP:

ZMU07905

ZMU02024

11

the fuel joint on the fuel line with the fuel
joint on the motor and firmly connect the
fuel line to the joint while pinching the
joint. Then firmly connect the other end
of the fuel line to the joint on the fuel tank.

Operation

1. Arrow

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.

EMU34815

Manual start models (tiller control)

EWM01842

Wipe up any spilled gasoline immediately
with dry rags. Dispose of rags properly ac­cording to local laws or regulations.
(3) 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.

 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 oper-

ating. 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.

39

Operation

TIP:

START

ZMU07886

Starting procedure (cold engine)
(1) Place the gear shift lever in neutral.

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.

(4) Pull out the choke knob fully.

(5) Pull the manual starter handle slowly un-

til you feel resistance. Then give a strong
pull straight out to crank and start the en­gine.

(3) Place the throttle grip in the “ ”

(start) position.

40

(6) After the engine starts, slowly return the

manual starter handle to its original posi­tion before releasing it.

(7) Slowly return the throttle grip to the fully

closed position.

Operation

TIP:

ZMU02030

(8) Return the choke knob to the home posi-

tion gradually.

 If the choke knob is left in the “ ” (start)

position while the engine is running, the en­gine will run poorly or stall.

 When the engine is cold, for example,

when the ambient temperature is low in
winter, it needs to be warmed up. For fur­ther information, see page 46.

 Do not turn the throttle grip unnecessarily

to open and close the throttle before start­ing the engine, otherwise the engine may
be difficult to start. If the engine is difficult
to start, place the throttle grip in the
“ ” (warm engine) position and
try again.

(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 “ ”

(start) position.

Starting procedure (warm engine)
(1) Place the gear shift lever in neutral.

(4) Pull the manual starter handle slowly un-

til you feel resistance. Then give a strong
pull straight out to crank and start the en­gine.

41

Operation

TIP:

TIP:

ZMU02030

N

 If the engine does not start, place the throt-

tle grip in the “ ” (warm engine)
position and try again.

EMU27638

Manual start models (remote control)

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 oper-

ating. 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.

 It is not necessary to use the choke when

starting a warm engine.

(5) After the engine starts, slowly return the

manual starter handle to its original posi­tion before releasing it.

(6) Slowly return the throttle grip to the fully

closed position.

42

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) Open the throttle slightly without shifting

TIP:

TIP:

TIP:

N

START

ZMU07886

using the neutral throttle lever. You may
need to change the throttle opening
slightly depending on engine tempera­ture. After the engine starts, return the
throttle to the original position.

Operation

 It is not necessary to use the choke when

starting a warm engine.
 If the choke knob is left in the “ ” (start)

position while the engine is running, the en-

gine will run poorly or stall.
(5) Pull the manual starter handle slowly un-

til you feel resistance. Then give a strong
pull straight out to crank and start the en­gine. Repeat if necessary.

 As a starting point, lift the lever just until

you feel resistance, then lift slightly more.

 The neutral throttle lever can only be used

when the remote control lever is in neutral.

(4) Pull out / turn the choke knob fully. After

the engine starts, replace / return the
knob to the home position.

(6) After the engine starts, slowly return the

manual starter handle to its original posi­tion before releasing it.

 When the engine is cold, it needs to be

warmed up. For further information, see

page 46.
 If the engine does not start on the first try,

repeat the procedure. If the engine fails to

start after 4 or 5 tries, open the throttle a

small amount and try again. Also if the en-

43

Operation

TIP:

TIP:

N

ZMU01771

ZMU01772

ON

OFF

ZMU01880

ZMU02252

N

gine is warm and fails to start, open the
throttle a small amount and try to start the
engine again. If the engine still fails to start,
see page 80.

EMU34934

Electric start models (remote control)

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.

(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).

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

44

(4) Open the throttle slightly without shifting

using the neutral throttle lever.

The neutral throttle lever can only be used
when the remote control lever is in neutral.

Operation

TIP:

TIP:

ON

START

OFF

ZMU02206

ON

START

ZMU01774

(5) Press in and hold the main switch to op-

erate the remote choke system. (The re­mote choke system operates only when
the main switch is pressed in fully.)

It is not necessary to use the choke when
starting a warm engine.
(6) Turn the main switch to “ ” (start) to

start the engine.

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]

(8) Return the neutral throttle lever to the

original position.

When the engine is cold, for example, when
the ambient temperature is low in winter, it
needs to be warmed up. For further informa­tion, see page 46.

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

(7) Immediately after the engine starts, re-

lease the main switch and allow it to re­turn to “ ” (on). The remote choke
system stops operating when the main
switch is released. NOTICE: Never turn

the main switch to “ ” (start) while
the engine is running. Do not keep the
starter motor turning for more than 5
seconds. If the starter motor is turned
continuously for more than 5 seconds,
the battery will be quickly discharged,
thus making it impossible to start the

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.

45

Operation

1

1. Cooling water pilot hole

EMU27671

Warming up engine

EMU27718

Manual start and electric start models

(1) After starting the engine, allow it to idle

for 3 minutes to warm up. NOTICE: Fail-

ure to do so will shorten engine life.

[ECM04550]

(2) Be sure the low oil pressure-alert indica-

tor goes off after starting the engine.

NOTICE: If the low oil pressure-alert

indicator blinks after the engine starts,
stop the engine. Otherwise, serious
engine damage could occur. Check
the oil level and add engine oil if nec­essary. Consult your Yamaha dealer if
the cause for the low oil pressure alert
cannot be found.

EMU36532

Checks after engine warm up

[ECM01832]

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.

EMU34563

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.

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

equipped).

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.

46

1

ZMU01727

1. Neutral interlock trigger

(2) Move the remote control lever / gear shift

TIP:

F

N

R

32˚

32˚

ZMU05460

ZMU07892

RF

ZMU05462

ZMU02030

lever firmly and crisply forward (for for­ward gear) or backward (for reverse gear)
[about 35° (a detent can felt) for remote
control models]. Be sure to check that
the tilt lock lever is in the lock/down po­sition (if equipped) before operating in re­verse.

Operation

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 neu­tral
(1) Close the throttle so that the engine

slows to idle speed.

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

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

47

Operation

N

ZMU01771

EMU31743

Stopping boat

EWM01511

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.

EMU27835

Procedure

(1) Push and hold the engine stop button

until the engine comes to a complete
stop.

 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.

 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.

48

(2) After stopping the engine, tighten the air

vent screw on the fuel tank cap and set
the fuel cock lever or knob to the closed
position, if equipped.

(3) Disconnect the fuel line if you are using

TIP:

TIP:

ZMU07906

ON

OFF

ZMU01779

an external fuel tank.

Operation

(2) After stopping the engine, disconnect

the fuel line or close the fuel cock if there
is a fuel joint or a fuel cock on the boat.

(3) Tighten the air vent screw on the fuel

tank cap (if equipped).

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

If the outboard motor is equipped with an en­gine shut-off cord, the engine can also be
stopped by pulling the cord and removing the
clip from the engine shut-off switch.

EMU27855

Procedure

(1) Turn the main switch to “ ” (off).

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.

49

Operation

TIP:

1

1

1. Trim operating angle

EMU27873

Adjusting trim angle for manual tilt
models

There are 4 or 5 holes provided in the clamp
bracket to adjust the outboard motor trim an­gle.
(1) Stop the engine.
(2) Tilt the outboard motor up, and then re-

move the trim rod from the clamp brack­et.

1. Trim rod

(3) Reposition the rod in the desired hole.
To raise the bow (“trim-out”), move the rod
away from the transom.
To lower the bow (“trim-in”), move the rod to­ward the transom.
Make test runs with the trim set to different
angles to find the position that works best for
your boat and operating conditions.

EWM00401

 Stop the engine before adjusting the

trim angle.
 Use care to avoid being pinched when

removing or installing the rod.
 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.

The outboard motor trim angle can be
changed approximately 4 degrees by shifting
the trim rod one hole.

EMU27906

Adjusting trim angle (power tilt mod­els)

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.

(1) Move the gear shift lever to the neutral

position.

50

TIP:

While the boat is moving, it may be difficult to

TIP:

adjust the trim angle due to water pressure.
Before adjusting the trim angle, reduce the
boat speed and shift into neutral.
(2) Tilt the outboard motor to the desired an-

gle using the power tilt switch.

Operation

UP
DN

ZMU01720

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

Stay within the trim operating angle when
trimming the outboard motor using the power
tilt system.

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.

Bow Up

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.

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.

51

Operation

TIP:

N

ZMU01771

ECM00242

 Before tilting the outboard motor, stop

the engine by following the procedure

on page 48. 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.

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

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.

EMU2797C

Procedure for tilting up (manual tilt
models)

(1) Place the remote control lever / gear shift

lever in neutral.

(2) Disconnect the fuel line from the out-

board motor.

52

Operation

ZMU07906

N

ZMU03196

(3) Place the tilt lock lever (if equipped) in the

release/up position.

(4) Pull up the shallow water lever (if

equipped).

(5) Hold the rear of the top cowling with one

hand and tilt the engine up fully.

(6) Push the tilt support knob into the clamp

bracket. Or the tilt support bar will turn to
the lock position automatically. 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 58.

[ECM01642]

EMU44610

Procedure for tilting up (power tilt
models)

(1) Place the remote control lever in neutral.

(2) Press the power tilt switch “ ” (up) until

the outboard motor has tilted up com­pletely.

UP

ZMU01787

(3) Push the tilt support knob into the clamp

bracket to support the engine.

WARNING! After tilting the outboard
motor, be sure to support it with the

53

Operation

ZMU07892

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 le-

ver 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 58.

[ECM01642]

(3) Slowly tilt the engine down.

EMU44620

Procedure for tilting down (power tilt
models)

(1) Push the power tilt switch “ ” (up) until

the outboard motor is supported by the
tilt rod and the tilt support knob becomes
free.

(2) Pull out the tilt support knob.

(3) Push the power tilt switch “ ” (down) to

lower the outboard motor to the desired
position.

EMU30193

Procedure for tilting down (manual tilt
models)

(1) Place the tilt lock lever in the lock posi-

tion.

(2) Slightly tilt the engine up until the tilt sup-

port bar is automatically released.

54

DN

ZMU01936

Operation

N

ZMU01771

EMU28063

Shallow water

EMU28074

Cruising in shallow water (manual tilt
models)

EWM01782

 Run the boat at the lowest possible

speed when using the shallow water
cruising system. The tilt lock mecha­nism does not work while the shallow
water cruising system is being used. Hit­ting an underwater obstacle could
cause the outboard motor to lift out of
the water, resulting in loss of control.

 Use extra care when operating in re-

verse. Too much reverse thrust can
cause the outboard motor to lift out of
the water, increasing the chance of ac­cident and personal injury.

ECM00261

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.

EMU28126

Procedure

(1) Place the remote control lever / gear shift

lever in neutral.

(2) Place the tilt lock lever in the release/up

position.

(3) Slightly tilt the outboard motor up. The tilt

support bar will lock automatically, sup­porting the outboard motor in a partially
raised position. This outboard motor has
2 positions for shallow water cruising.

55

Operation

ZMU07892

N

ZMU01771

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

mal running position, place the remote
control lever / gear shift lever in neutral.

(5) Place the tilt lock lever in the lock/down

position, then slightly tilt the outboard
motor up until the tilt support bar auto­matically returns to the free position.

ting up for and cruising in shallow water.
Otherwise severe damage from overheat­ing can result.

EMU32953

Procedure for power tilt models

(1) Place the remote control lever in neutral.

(2) Slightly tilt the outboard motor up to the

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

[EWM01961]

(6) Slowly lower the outboard motor to the

normal position.

EMU32862

Power tilt models

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

ECM00261

Do not tilt the outboard motor up so that
the cooling water inlet on the lower unit is
above the surface of the water when set-

56

UP

ZMU01935

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

mal running position, press the power 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 16) 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

57

Maintenance

ZMU07906

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 consider­ably 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 oc­cur 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 run­ning position, use an additional support
device to secure it in the tilt position.

ECM02441

 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 out-

board 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.

EMU34822

Dismounting the outboard motor

ECM01681

Do not hold the top cowling when mount­ing or dismounting the outboard motor.
The top cowling could come off, causing
the outboard motor to fall.

(1) Stop the engine and land the boat.
(2) Disconnect the fuel line from the out-

board motor.

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.

58

(3) For electric start models, disconnect the

battery cables from the battery terminals.

(4) To prevent steering movement, turn the

1

2

adjuster lever to “A” (if equipped with the
adjuster lever). To hold the steering
bracket easily, raise the tiller handle to
the vertical position (if equipped with the
tiller handle).

(5) Loosen the clamp screw(s).
(6) Hold the handgrip and steering bracket

as shown in the illustration and lift up the
outboard motor to dismount it from the
boat.

Maintenance

1. Steering bracket

2. Handgrip

(7) When transporting or storing the out-

board motor while removed from a boat,
keep the outboard motor in the attitude
shown or use an outboard motor stand.

59

Maintenance

TIP:

ZMU02263

ZMU02487

ZMU08291

EMU28242

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.

ECM01081

 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), put it on a cushion after draining

the engine oil.
 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.

When transporting the outboard motor in a
horizontal position, place a towel or some­thing similar under the outboard motor to
protect it from damage.

60

EMU28306

Procedure

EMU32027

Flushing in a test tank

ECM00302

Before starting the engine, make sure to
supply water to the cooling water passag­es. Otherwise, the engine could overheat
and be damaged.

(1) Dismount the outboard motor from the

boat. For further details, see page 58.

Maintenance

ZMU02051

1

2

ZMU07891

(2) Wash the outboard motor body using

fresh water. NOTICE: Do not spray wa-

ter into the air intake.

[ECM01841] For further

information, see page 63.

(3) Disconnect the fuel line from the out-

board motor.

(4) Remove the top cowling and silencer

cover/cap, if equipped. Remove the pro­peller. For further details, see page 73.

(5) Position the outboard motor on a water

tank. For further details, see page 30.

(6) Fill the tank with fresh water until the anti-

cavitation plate is immersed in water.

NOTICE: If the fresh water level is be-

low the level of the anti-cavitation
plate, or if the water supply is insuffi­cient, engine seizure may occur.

[ECM00292]

1. Water surface

2. Lowest water level

(7) 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.

WARNING! 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.

[EWM00092]

(8) Run the engine at a fast idle for a few

minutes in neutral position.

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

ly spray “Fogging Oil” alternately into
each carburetor or the fogging hole of
the silencer cover, if equipped. When
properly done, the engine will smoke ex­cessively and almost stall.

(10) Remove the outboard motor from the

test tank.

(11) Install the silencer cover/cap of fogging

hole (if equipped) and top cowling.

(12) If the “Fogging Oil” is not available, run

the engine at a fast idle until the fuel sys­tem becomes empty and the engine
stops.

(13) Drain the cooling water completely out of

the motor. Clean the body thoroughly.

(14) If the “Fogging Oil” is not available, re-

move the spark plug(s). Pour a tea­spoonful of clean engine oil into each
cylinder. Crank several times manually.

Replace the spark plug(s).
(15) Drain the fuel from the fuel tank.
(16) Store the fuel tank in a dry, well-ventilat-

ed place, not in direct sunlight.

61

Maintenance

TIP:

1

2

3

EMU41072

Lubrication

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

page 76. Check the gear oil for the pres­ence of water that indicates a leaky seal.
Seal replacement should be performed
by an authorized Yamaha dealer prior to
use.

(2) Lubricate all grease fittings. For further

details, see page 68.

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.

EMU28446

Flushing power unit

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) After shutting off the engine, unscrew the

garden hose connector from the fitting
on the bottom cowling.

1. Fitting

2. Garden hose connector

3. Garden hose adapter

(2) Screw the garden hose adapter onto a

garden hose, which is connected to a

fresh water supply, and then connect it

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

and let the water flush through the cool-

ing passages for about 15 minutes. Turn

off the water and disconnect the garden

hose adapter from the garden hose con-

nector.
(4) Reinstall the garden hose connector

onto the fitting on the bottom cowling.

Tighten the connector securely.

NOTICE: Do not leave the garden hose

connector loose on the bottom cowl-

ing fitting or let the hose hang free

during normal operation. Water will

leak out of the connector instead of

62

Maintenance

TIP:

1

cooling the engine, which can cause
serious overheating. Be sure the con­nector is tightened securely on the fit­ting after flushing the engine.

[ECM00542]

 When flushing the engine with the boat in

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

 For cooling system flushing instructions,

see page 58.

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.

1. Air intake

[ECM01841]

(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.

EMU37006

Periodic maintenance

EWM01943

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 tilt switch 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 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.

63

Maintenance

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
Outboard motors operating under any of
these above conditions require more fre­quent maintenance. Yamaha recommends
that you do this service twice as often as
specified in the maintenance chart. For ex­ample, 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.

64

Maintenance

TIP:

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 34, 36

Engine starting
condition/noise

Engine idle
speed/noise

Engine oil Replacement 70

Engine oil filter
(built into oil pan)

Inspection or re­placement as nec­essary

Inspection or re­placement as nec­essary

Replacement —

Inspection 78

Fill, charging or re­placing as neces­sary

Inspection or re­placement as nec­essary

Inspection 38

Inspection 70

Inspection, clean­ing or replacement
as necessary

20 hours

(3

months)

100 hours

(1 year)

300 hours

(3 years)

500 hours

(5 years)

Page

77

—

—

—

—

65

Maintenance

Initial Every

Item Actions

Fuel filter (disposal
type)

Fuel line Inspection —

Fuel line

Fuel pump

Fuel/engine oil
leakage

Gear oil Replacement 76

Greasing points Greasing 68

Clamp bracket bolt
(through tube)

Impeller/water
pump housing

Impeller/water
pump housing

Power tilt unit Inspection 37

Propeller/propeller
nut/cotter pin

Shift link/shift ca­ble

Spark plug(s)

Spark plug
caps/spark plug
wires

Water from the
cooling water pilot
hole

Throttle link/throt­tle cable

Thermostat

Replacement —

Inspection or re­placement as nec­essary

Inspection or re­placement as nec­essary

Inspection —

Inspection and
greasing

Inspection or re­placement as nec­essary

Replacement —

Inspection or re­placement as nec­essary

Inspection, adjust­ment or replace­ment as necessary

Inspection or re­placement as nec­essary

Inspection or re­placement as nec­essary

Inspection 45

Inspection, adjust­ment or replace­ment as necessary

Inspection or re­placement as nec­essary

20 hours

(3

months)

100 hours

(1 year)

300 hours

(3 years)

500 hours

(5 years)

Page

—

—

—

—

73

—

69

—

—

—

66

Maintenance

Initial Every

Item Actions

Timing belt

Valve clearance

Cooling water inlet Inspection 17

Main switch/stop
switch/choke
switch

Wire harness con­nections/wire cou­pler connections

Fuel tank (Yamaha
portable tank)

EMU46010

Inspection or re­placement as nec­essary

Inspection and ad­justment

Inspection or re­placement as nec­essary

Inspection or re­placement as nec­essary

Inspection and
cleaning as neces­sary

*1 cylinder head
*2 cylinder head

EMU46082

Maintenance chart 2

Item Actions

Exhaust guide/ex­haust manifold

Timing belt Replacement —

Inspection or re­placement as nec­essary

20 hours

(3

months)

100 hours

(1 year)

Every

1000 hours

300 hours

(3 years)

500 hours

(5 years)

Page

—

—

—

—

—

Page

—

67

Maintenance

ZMU06671

EMU28946

Greasing

Yamalube grease A (water resistant grease)
Yamaha grease D (corrosion resistant grease; for propeller shaft)

68

Maintenance

TIP:

1

11

22

33

EMU44493

Cleaning and adjusting spark plug

The spark plug is an important engine com­ponent and is easy to inspect. The condition
of the spark plug can indicate something
about the condition of the engine. For exam­ple, if the center electrode porcelain is very
white, this could indicate an intake air leak or
carburetion problem in that cylinder. Do not
attempt to diagnose any problems yourself.
Instead, take the outboard motor to a

Yamaha dealer. You should periodically re-

move and inspect the spark plug because
heat and deposits will cause the spark plug to
slowly break down and erode.
(1) Remove the spark plug caps from the

spark plugs.

(3) Be sure to use the specified spark plug,

otherwise the engine may not operate
properly. Before fitting the spark plug,
measure the electrode gap with a wire
thickness gauge; replace it if out of spec­ification.

1. Spark plug gap

2. Spark plug part number

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

Spark plug gap:

0.9–1.0 mm (0.035–0.039 in)

(4) When fitting the plug, wipe off any dirt

from the threads, and then screw it in to
the correct torque.

1. Spark plug cap

(2) Remove the spark plug. If electrode ero-

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

Standard spark plug:

BR6HS-10

[EWM00562]

Spark plug torque:

24 N·m (2.4 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 to 2/3 turn past finger-tight.

69

Maintenance

1

EMU28992

Checking fuel filter

Check the fuel filter periodically. The fuel filter
is a one piece, disposable type. If foreign
matter is found in the filter, replace it. For re­placement of the fuel filter, consult your

Yamaha dealer.

1. Fuel filter

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]

70

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

TIP:

TIP:

TIP:

ZMU02263

1

1

2

1

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.

Maintenance

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

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:

24 N·m (2.4 kgf·m, 18 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.

71

Maintenance

TIP:

3 2 1

(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:

0.8 L (0.85 US qt, 0.70 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.

1. Oil dipstick

2. Upper mark

3. Lower mark

(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.

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.

72

EMU29116

ZMU07837

ZMU07969

ZMU07970

Inspecting wiring and connectors

 Inspect that each connector is engaged se-

curely.

 Inspect that each ground lead is properly

secured.

Maintenance

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.

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.

 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]

73

Maintenance

23

5

4

1

6

3

234

5

1

23

5

4

1

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. Cotter pin

2. Propeller nut

3. Washer

4. Propeller

5. Thrust washer

(3) Remove the propeller, washer (if

equipped), and thrust washer.

EMU46500

Dual thrust models

(1) Straighten the cotter pin and pull it out

using a pair of pliers.
(2) Remove the propeller nut, washer, and

spacer. WARNING! Do not use your

hand to hold the propeller when loos-

ening the propeller nut.

1. Cotter pin

2. Propeller nut

3. Washer

4. Spacer

5. Propeller

6. Thrust washer

(3) Remove the propeller, washer, and

thrust washer.

[EWM01891]

74

(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.

[ECM01882]

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

washer. Tighten the propeller nut to the
specified torque.

1. Cotter pin

2. Propeller nut

3. Washer

4. Propeller

5. Thrust washer

Propeller nut tightening torque:

17 N·m (1.7 kgf·m, 13 lb·ft)

(4) Align the propeller nut with the propeller

TIP:

TIP:

6

3

234

5

1

ZMU02063

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]

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.

EMU46512

Dual thrust 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.

Maintenance

1. Cotter pin

2. Propeller nut

3. Washer

4. Spacer

5. Propeller

6. Thrust washer

Propeller nut tightening torque:

21 N·m (2.1 kgf·m, 15 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]

(1) Apply Yamaha marine grease or a corro-

sion resistant grease to the propeller

shaft.
(2) Install the thrust washer, washer, and

propeller on the propeller shaft. NOTICE:

Make sure to install the thrust washer

before installing the propeller. Other-

wise, the lower case and propeller

boss could be damaged.

(3) Install the spacer and the washer. Tight-

en the propeller nut to the specified

torque.

[ECM01882]

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.

75

Maintenance

TIP:

TIP:

2

1

ZMU06686

EMU47070

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 pos-

sible.
(2) Place a suitable container under the gear

case.
(3) Remove the gear oil drain screw and

gasket. NOTICE: If there is an exces-

sive quantity of metal particles on the

magnetic gear oil drain screw, this

can indicate lower unit problem. Con-

sult your Yamaha dealer.

[ECM01901]

 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.

[ECM00714]

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

Gear oil quantity:

0.150 L (0.159 US qt, 0.132 Imp.qt)
(F6DM, F6DMH, F8FE, F8FMH)

0.370 L (0.391 US qt, 0.326 Imp.qt)
(FT8GE, FT8GEP, FT8GMH)

1. Gear oil drain screw

2. Oil level plug

 If a magnetic gear oil drain screw is

equipped, remove all metal particles from
the screw before installing it.

76

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

TIP:

TIP:

TIP:

1

1

1

When the oil begins to flow out of the oil

level plug hole, insert and tighten the oil

level plug.

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)

Maintenance

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

screw. Insert and tighten the gear oil

drain screw.

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.

ECM00721

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

1. Anode

1. Anode

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.

77

Maintenance

ZMU01811

1

2

3

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:
 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.

(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.

EMU29335

[EWM01913]

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.

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

is equipped with the digital speedome-

ter, the voltmeter and low battery alert

functions will help you monitor the bat-

tery’s charge. If the battery needs charg-

ing, consult your Yamaha dealer.

78

1. Red cable

2. Black cable

3. Battery

(3) The electrical contacts of the battery and

cables must be clean and properly con-

nected, or the battery will not start the

engine.

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 dam-

age 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 instruc-

tions.

[ECM01931]

[ECM01941]

Maintenance

79

Trouble Recovery

EMU29428

Troubleshooting

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

Starter will not operate.

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

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

Q. Is fuse for electric start 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 faulty?
A. Have serviced by a Yamaha dealer.

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

Engine will not start (starter operates).

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

Q. Is fuel contaminated or stale?

A. Fill tank with clean, fresh fuel.

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

Q. Is starting procedure incorrect?
A. See page 39.

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

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

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

Q. Is ignition wiring damaged or poorly con­nected?
A. Check wires for wear or breaks. Tighten all
loose connections. Replace worn or broken
wires.

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

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

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

Engine idles irregularly or stalls.

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

80

Trouble Recovery

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

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

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

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

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

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

Q. Is ignition wiring damaged or poorly con­nected?
A. Check wires for wear or breaks. Tighten all
loose connections. Replace worn or broken
wires.

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

A. Return to home position.

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

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

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

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

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

Alert buzzer sounds or indicator lights.

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

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

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

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

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

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

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

Q. Is choke knob pulled out?

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

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

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

Q. Has oil feed/injection pump malfunc­tioned?

81

Trouble Recovery

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

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

Engine power loss.

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

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

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

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

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

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

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

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

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

Q. Is ignition wiring damaged or poorly con­nected?
A. Check wires for wear or breaks. Tighten all
loose connections. Replace worn or broken
wires.

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

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

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

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

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

82

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

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

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

Q. Is fuel pump damaged?

Trouble Recovery

A. Have serviced by a Yamaha dealer.

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

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

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

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

Engine vibrates excessively.

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

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

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

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

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

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.

EMU30684

Replacing fuse

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

83

Trouble Recovery

1

2

3

4

1

ZMU04337

111

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.

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

1. Fuse holder

2. Fuse (10 A)

3. Spare fuse (10 A)

4. Fuse puller

EMU32134

Power tilt will not operate

EWM02331

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

If the outboard motor cannot be tilted
up/down using the power 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. Fuse puller

84

1. Manual valve screw

(3) Adjust the outboard motor to a navigable

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

EMU29534

Starter will not operate

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

EWM01023

 Use this procedure only in an emergen-

cy to return to the nearest port for re­pairs.

Trouble Recovery

1

 When the emergency starter rope is

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

 Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm
or leg while operating the boat.

 Do not attach the cord to clothing that

could tear loose. Do not route the cord
where it could become entangled, 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.

 Make sure no one is standing behind

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

 An unguarded, rotating flywheel is very

dangerous. Keep loose clothing and
other objects away when starting the
engine. Use the emergency starter rope
only as instructed. Do not touch the fly­wheel or other moving parts when the
engine is running. Do not install the
starter mechanism or top cowling after
the engine is running.

 Do not touch the ignition coil, spark plug

wire, spark plug cap, or other electrical
components when starting or operating
the motor. You could get an electrical
shock.

EMU29563

Emergency starting engine

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

ble from the starter, if equipped.

1. Start-in-gear protection cable

(3) Remove the starter/flywheel cover after

removing the bolt(s).

(4) Prepare the engine for starting. For fur-

ther information, see page 39. Be sure
the engine is in neutral and that the clip is
attached to the engine shut-off switch.
The main switch must be “ ” (on), if
equipped.

85

Trouble Recovery

ON

OFF

ZMU01880

ZMU07907

1

(5) If equipped the choke knob, pull out it

when the engine is cold. After the engine

starts, gradually return the choke knob to

its home position as the engine warms

up.

(6) Insert the knotted end of the emergency

starter rope into the notch in the flywheel

rotor and wind the rope several turns

around the flywheel clockwise.
(7) Give a strong pull straight out to crank

and start the engine. Repeat if neces-

sary.

EMU29672

Engine fails to operate

EMU35322

Emergency engine operation

If the battery voltage is low or in the unlikely
event of an ignition system malfunction, the
engine speed may become erratic or the en­gine may stop. In such a situation, follow the
procedure below.
Disconnect the yellow cord (emergency cir­cuit) of the CDI unit.
Run the engine at low speed and return to
port. NOTICE: Follow this procedure only

in an emergency and just long enough to
return to port for repairs.

[ECM00382]

86

1. Yellow cord

EMU33502

Treatment of submerged motor

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

ately. NOTICE: Do not attempt to run the

outboard motor until it has been com­pletely inspected.

[ECM00402]

Trouble Recovery

87

INDEX

A

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

Alert indicator ....................................... 27

Alert system.......................................... 29

Anode(s), inspecting and replacing ...... 77

Anti-fouling paint .................................. 16

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

B

Battery ..................................................37

Battery, checking

(electric start models) ......................... 78

Battery, connecting .............................. 78

Battery, disconnecting.......................... 79

Battery requirements............................13

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

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

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

Breaking in engine................................ 33

C

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

CE Marking / UKCA Marking.................. 6

Checks after engine warm up............... 46

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

Checks before starting engine.............. 34

Choke knob .......................................... 24

Choke switch........................................ 21

Clamping the outboard motor .............. 32

Cleaning the outboard motor ............... 63

Collisions with floating or submerged

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

Components diagram........................... 17

Control functions, checking.................. 34

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

Cowling lock lever ................................ 27

Cruising in salt water or other

conditions...........................................57

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

Emergency engine operation................ 86

Emergency equipment..........................16

Emergency starting engine ................... 85

Emergency, temporary action in........... 83

Engine fails to operate.......................... 86

Engine oil .............................................. 35

Engine oil, changing .............................70

Engine oil, filling.................................... 33

Engine oil requirements........................ 14

Engine shut-off cord (lanyard) .......... 1, 35

Engine shut-off cord (lanyard) and

clip...................................................... 23

Engine stop button ............................... 23

F

Filling fuel..............................................37

First-time operation ..............................33

Flushing device............................... 27, 36

Flushing in a test tank........................... 60

Flushing power unit .............................. 62

Fuel filter, checking............................... 70

Fuel leaks, checking for........................ 34

Fuel level...............................................34

Fuel requirements................................. 15

Fuel system...........................................34

Fuel tank ...............................................19

Fuse, replacing ..................................... 83

G

Gasoline............................................2, 15

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

Gear oil, changing................................. 76

Gear shift lever...................................... 21

Greasing ...............................................68

H

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

D

Dismounting the outboard motor ......... 58

E

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

88

I

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

Idle speed, inspecting........................... 70

Impact damage.....................................83

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

INDEX

Instruments and indicators................... 28

K

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

L

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

Low oil pressure alert ........................... 29

Low oil pressure-alert indicator............ 28

Lubrication............................................ 62

M

Main switch .......................................... 24

Maintenance chart 1............................. 65

Maintenance chart 2............................. 67

Manual starter handle........................... 24

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

Mounting height.................................... 31

Mounting outboard motor .................... 13

Mounting the outboard motor .............. 30

Muddy or acidic water.......................... 16

N

Neutral interlock trigger........................ 21

Neutral throttle lever............................. 21

O

Operating engine .................................. 38

Outboard motor, checking ................... 35

Outboard motor disposal

requirements ......................................16

Outboard motor (painted surface),

checking............................................. 63

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

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

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

Power tilt switch ...................................24

Power tilt system, checking.................. 37

Power tilt unit........................................26

Power tilt will not operate .....................84

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

Propeller, checking............................... 73

Propeller, installing ............................... 74

Propeller, removing............................... 73

Propeller selection................................14

R

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

Remote control box..............................20

Remote control lever ............................20

Remote control requirements ............... 13

Replacement parts ...............................63

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

S

Sending fuel (portable tank)..................38

Severe operating conditions................. 64

Shallow water ....................................... 55

Shifting.................................................. 46

Shifting (checks after engine warm

up).......................................................46

Spark plug, cleaning and adjusting ...... 69

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

Starter will not operate .........................84

Starting engine......................................39

Start-in-gear protection........................ 14

Steering friction adjuster....................... 25

Stop switches ....................................... 46

Stopping boat....................................... 48

Stopping engine ...................................48

Storing outboard motor ........................ 60

Submerged outboard motor................. 86

P

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

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

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

Periodic maintenance........................... 63

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

Power tilt................................................. 1

T

Throttle friction adjuster........................22

Throttle grip ..........................................22

Throttle indicator................................... 22

Tiller handle ..........................................21

Tilt lock mechanism.............................. 26

Tilt support bar .....................................26

89

INDEX

Tilt support knob ..................................26

Tilting up and down..............................52

To use the battery................................. 13

Top cowling, installing.......................... 36

Top cowling, removing ......................... 34

Transporting and storing outboard

motor .................................................. 58

Trim rod (tilt pin).................................... 25

Trimming outboard motor..................... 49

Troubleshooting....................................80

W

Warming up engine .............................. 46

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

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

Wiring and connectors, inspecting....... 73

Y

Yamalube.............................................. 72

90

Printed in Japan
January 2022–0.5 × 1 CR