Yamaha F115A, FL115A, F115A1, FL115A1, F150A User Manual

OWNER’S MANUAL

Read this manual carefully before operating this

outboard motor.

F115A
FL115A
F115A1
FL115A1
F150A
FL150A
F150A2
FL150A2
F150B

63P-28199-7E-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

WARNING

NOTICE

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.

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

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 F115AET, FL115AET, F115AET1,
FL115AET1, F150AET, FL150AET,
F150AET2, FL150AET2, F150BET 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.

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

Important manual information

EMU25122

F115A, FL115A, F115A1, FL115A1,
F150A, FL150A, F150A2, FL150A2,

F150B

OWNER’S MANUAL

©2013 by Yamaha Motor Co., Ltd.

1st Edition, October 2013

Any reprinting or unauthorized use

without the written permission of

All rights reserved.

Yamaha Motor Co., Ltd.

is expressly prohibited.

Printed in Japan

Table of contents

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Overloading........................................ 2

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

Weather.............................................. 3

Passenger training ............................. 3

Boating safety publications................ 3

Laws and regulations......................... 3

General information .......................... 4

Identification numbers record ......... 4

Outboard motor serial number........... 4

Key number........................................ 4

EC Declaration of Conformity

(DoC) ........................................... 4

CE Marking .................................... 4

Read manuals and labels ................ 6

Warning labels ................................... 6

Warning labels ................................... 9

Specifications and requirements... 12

Specifications................................ 12

Installation requirements............... 16

Boat horsepower rating.................... 16

Mounting outboard motor................ 16

Yamaha Security System

(if equipped).................................. 16

Remote control requirements ....... 16

Battery requirements .................... 17

Battery specifications....................... 17

Mounting battery.............................. 17

Multiple batteries.............................. 17

Propeller selection ........................ 17

Counter rotation models .................. 18

Start-in-gear protection ................ 18

Engine oil requirements ................ 18

Fuel requirements ......................... 19

Gasoline ........................................... 19

Muddy or acidic water .................. 19

Anti-fouling paint .......................... 20

Outboard motor disposal

requirements.............................. 20

Emergency equipment.................. 20

Emission control information ........ 20

Star labels ........................................ 21

Components .................................... 23

Components diagram ................... 23

Remote control transmitter

(if equipped) .................................. 27

Receiver (if equipped)....................... 27

Yamaha Security System lock and

unlock mode (if equipped) ............ 27

Remote control box.......................... 28

Remote control lever........................ 28

Neutral interlock trigger.................... 29

Neutral throttle lever......................... 29

Free accelerator ............................... 29

Tiller handle (if equipped) ................. 30

Gear shift lever (if equipped) ............ 30

Throttle grip (if equipped)................. 30

Throttle indicator (if equipped) ......... 30

Throttle friction adjuster ................... 31

Engine shut-off cord (lanyard) and

clip ................................................ 31

Engine stop button (if equipped) ...... 32

Main switch ...................................... 32

Steering friction adjuster

(if equipped) .................................. 33

Table of contents

Power trim and tilt switch on remote

control or tiller handle ................... 33

Power trim and tilt switch on bottom

cowling.......................................... 34

Power trim and tilt switches (twin

binnacle type) ............................... 34

Trim tab with anode ......................... 35

Tilt support lever for power trim and

tilt model ....................................... 35

Cowling lock lever (pull up type) ...... 36

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

Fuel filter/Water separator................ 37

Alert indicator (if equipped) .............. 37

Instruments and indicators ............39

Indicators (if equipped) ................. 39

Low oil pressure-alert indicator........ 39

Overheat-alert indicator ................... 39

Digital tachometer ......................... 39

Tachometer ...................................... 40

Trim meter........................................ 40

Hour meter ....................................... 40

Low oil pressure-alert indicator........ 40

Overheat-alert indicator ................... 41

Digital speedometer ...................... 41

Speedometer.................................... 41

Fuel gauge........................................ 41

Trip meter / Clock / Voltmeter.......... 42

Fuel level-alert indicator ................... 43

Low battery voltage-alert

indicator........................................ 43

Fuel management meter ............... 43

Fuel flow meter................................. 43

Fuel consumption meter / Fuel

economy meter / Twin engine

speed synchronizer....................... 44

Water separator-alert indicator ........ 45

6Y8 Multifunction meters .............. 46

6Y8 Multifunction tachometers ..... 46

Start-up checks................................ 47

Yamaha Security System

information (if equipped)............... 47

Low oil pressure-alert....................... 48

Overheat alert................................... 48

Water separator alert........................ 49

Engine trouble alert .......................... 49

Low battery voltage-alert ................. 49

6Y8 Multifunction speed & fuel

meters........................................ 50

6Y8 Multifunction

speedometers............................ 51

6Y8 Multifunction fuel

management meters.................. 51

Engine control system.................... 53

Alert system .................................. 53

Overheat alert (twin engines)............ 53

Low oil pressure alert ....................... 53

Installation ....................................... 55

Installation..................................... 55

Mounting the outboard motor .......... 55

Operation ......................................... 57

First-time operation ...................... 57

Fill engine oil..................................... 57

Breaking in engine............................ 57

Getting to know your boat ............... 57

Checks before starting engine...... 57

Fuel level .......................................... 58

Remove cowling............................... 58

Fuel system ...................................... 58

Controls............................................ 59

Engine shut-off cord (lanyard) .......... 59

Engine oil.......................................... 59

Engine .............................................. 60

Flushing device ................................ 60

Install cowling................................... 61

Checking power trim and tilt

system........................................... 62

Battery.............................................. 63

Filling fuel ..................................... 64

Operating engine .......................... 64

Sending fuel ..................................... 64

Starting engine ................................. 65

Checks after starting engine......... 68

Cooling water ................................... 68

Table of contents

Warming up engine ....................... 69

Electric start models ........................ 69

Checks after engine warm up ....... 69

Shifting ............................................. 69

Stop switches................................... 69

Shifting .......................................... 69

Stopping boat ............................... 71

Stopping engine ............................ 71

Procedure......................................... 71

Trimming outboard motor ............. 72

Adjusting trim angle

(Power trim and tilt)....................... 73

Adjusting boat trim........................... 73

Tilting up and down ...................... 74

Procedure for tilting up

(power trim and tilt models) .......... 75

Procedure for tilting down................ 76

Shallow water ............................... 77

Power trim and tilt models ............... 77

Cruising in other conditions .......... 78

Maintenance .................................... 79

Transporting and storing outboard

motor.......................................... 79

Storing outboard motor.................... 79

Procedure......................................... 80

Lubrication ....................................... 82

Flushing power unit.......................... 82

Cleaning the outboard motor........... 83

Checking painted surface of

outboard motor............................. 83

Periodic maintenance ................... 84

Replacement parts........................... 84

Severe operating conditions ............ 84

Maintenance chart 1 ........................ 85

Maintenance chart 2 ........................ 87

Greasing........................................... 88

Cleaning and adjusting spark plug... 90

Inspecting idle speed....................... 90

Changing engine oil.......................... 91

Inspecting wiring and connectors.... 94

Checking propeller........................... 95

Removing propeller.......................... 95

Installing propeller............................ 96

Changing gear oil ............................. 97

Inspecting and replacing anode(s) ... 98
Checking battery (for electric start

models) ......................................... 99

Connecting the battery..................... 99

Disconnecting the battery .............. 101

Storing the battery.......................... 101

Trouble Recovery.......................... 102

Troubleshooting.......................... 102

Temporary action in

emergency ............................... 105

Impact damage .............................. 105

Running single engine

(twin engines).............................. 106

Replacing fuse................................ 106

Power trim and tilt will not

operate........................................ 107

Water separator-alert indicator

blinks while cruising.................... 107

Starter will not operate

(F115A, FL115A, F115A1,

FL115A1)..................................... 110

Emergency starting engine

(F115A, FL115A, F115A1,

FL115A1)..................................... 111

Treatment of submerged

motor ....................................... 112

INDEX ............................................. 113

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.

EMU33661

Power trim and tilt

Body parts can be crushed between the mo­tor and the clamp bracket when the motor is
trimmed or tilted. Keep body parts out of this
area at all times. Be sure no one is in this area
before operating the power trim and tilt
mechanism.
The power trim and tilt switches operate even
when the main switch is off. Keep people 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 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 64 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.

EMU33741

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

EMU33762

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 instruc-

2

Safety information

ZMU06025

tions. Overloading or incorrect weight
distribution can compromise the boats 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.

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.

EMU33601

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.

3

EMU25172

Identification numbers record

EMU25185

Outboard motor serial number

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

1. Outboard motor serial number location

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.

General information

1. Key number

EMU37292

EC Declaration of Conformity

(DoC)

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;

 Name of Engine Manufacture
 Model name
 Product code of model (Approved model

code)

 Code of conformed directives

EMU25207

CE Marking

Outboard motors affixed with this “CE”mark­ing conform with the directives of;
2006/42/EC, 94/25/EC - 2003/44/EC and
2004/108/EC.

4

General information

ZMU06040

1. CE marking location

5

General information

ZMU06688

1

3

2

2

EMU33524

Read manuals and labels

Before operating or working on this outboard motor:

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

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

EMU33834

Warning labels

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

F115AET, FL115AET, F115AET1, FL115AET1

6

General information

WARNING

WARNING

WARNING

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.

7

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.

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

8

General information

EMU42711

Warning labels

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

F150AET, FL150AET, F150AET2, FL150AET2, F150BET

9

General information

WARNING

WARNING

1

2

ZMU06191

3

ZMU05710

EMU42741

Contents of labels

The above warning labels mean as follows.

1

EWM01682

 Keep hands, hair, and clothing away

from rotating parts while the engine is
running.

 Do not touch or remove electrical parts

when starting or during operation.

2

EWM01672

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

vice (PFD).

 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.

EMU42731

Other labels

10

General information

ZMU05696

ZMU05664

ZMU05665

ZMU05666

EMU42751

Symbols

The following symbols mean as follows.

Notice/Warning

Read Owner’s Manual

Electrical hazard

Hazard caused by continuous rotation

11

Specifications and requirements

TIP:

EMU34522

Specifications

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

EMU2821U

Dimension and weight:

Overall length:

F115AET 783 mm (30.8 in)
F115AET1 783 mm (30.8 in)
F150AET 821 mm (32.3 in)
F150AET2 821 mm (32.3 in)
F150BET 821 mm (32.3 in)
FL115AET 783 mm (30.8 in)
FL115AET1 783 mm (30.8 in)
FL150AET 821 mm (32.3 in)
FL150AET2 821 mm (32.3 in)

Overall width:

F115AET 498 mm (19.6 in)
F115AET1 498 mm (19.6 in)
F150AET 513 mm (20.2 in)
F150AET2 513 mm (20.2 in)
F150BET 513 mm (20.2 in)
FL115AET 498 mm (19.6 in)
FL115AET1 498 mm (19.6 in)
FL150AET 513 mm (20.2 in)
FL150AET2 513 mm (20.2 in)

Overall height L:

F115AET 1609 mm (63.3 in)
F115AET1 1609 mm (63.3 in)
F150AET 1714 mm (67.5 in)
F150AET2 1714 mm (67.5 in)
FL150AET 1714 mm (67.5 in)

Overall height X:

F115AET 1736 mm (68.3 in)
F115AET1 1736 mm (68.3 in)
F150AET 1842 mm (72.5 in)
F150AET2 1842 mm (72.5 in)
F150BET 1842 mm (72.5 in)
FL115AET 1736 mm (68.3 in)
FL115AET1 1736 mm (68.3 in)
FL150AET 1842 mm (72.5 in)
FL150AET2 1842 mm (72.5 in)

Motor transom height L:

F115AET 516 mm (20.3 in)
F115AET1 516 mm (20.3 in)
F150AET 516 mm (20.3 in)
F150AET2 516 mm (20.3 in)
FL150AET 516 mm (20.3 in)

Motor transom height X:

643 mm (25.3 in)

Dry weight (SUS) L:

F115AET 186 kg (410 lb)
F115AET1 186 kg (410 lb)
F150AET 223 kg (492 lb)
F150AET2 223 kg (492 lb)
FL150AET 223 kg (492 lb)

Dry weight (SUS) X:

F115AET 191 kg (421 lb)
F115AET1 191 kg (421 lb)
F150AET 228 kg (503 lb)
F150AET2 228 kg (503 lb)
F150BET 228 kg (503 lb)
FL115AET 191 kg (421 lb)
FL115AET1 191 kg (421 lb)
FL150AET 228 kg (503 lb)
FL150AET2 228 kg (503 lb)

12

Specifications and requirements

Performance:

Full throttle operating range:

F115AET 5000–6000 r/min
F115AET1 5000–6000 r/min
F150AET 5000–6000 r/min
F150AET2 5000–6000 r/min
F150BET 4500–5500 r/min
FL115AET 5000–6000 r/min
FL115AET1 5000–6000 r/min
FL150AET 5000–6000 r/min
FL150AET2 5000–6000 r/min

Rated power:

F115AET 84.6 kW (115 HP)
F115AET1 84.6 kW (115 HP)
F150AET 110.3 kW (150 HP)
F150AET2 110.3 kW (150 HP)
F150BET 110.3 kW (150 HP)
FL115AET 84.6 kW (115 HP)
FL115AET1 84.6 kW (115 HP)
FL150AET 110.3 kW (150 HP)
FL150AET2 110.3 kW (150 HP)

Idle speed (in neutral):

F115AET 700–800 r/min
F115AET1 700–800 r/min
F150AET 650–750 r/min
F150AET2 650–750 r/min
F150BET 650–750 r/min
FL115AET 700–800 r/min
FL115AET1 700–800 r/min
FL150AET 650–750 r/min
FL150AET2 650–750 r/min

Power unit:

Type:

4-stroke DOHC L4 16 valves

Total displacement:

F115AET 1741 cm³ (106.2 c.i.)
F115AET1 1741 cm³ (106.2 c.i.)
F150AET 2670 cm³ (162.9 c.i.)
F150AET2 2670 cm³ (162.9 c.i.)
F150BET 2670 cm³ (162.9 c.i.)
FL115AET 1741 cm³ (106.2 c.i.)
FL115AET1 1741 cm³ (106.2 c.i.)
FL150AET 2670 cm³ (162.9 c.i.)
FL150AET2 2670 cm³ (162.9 c.i.)

Bore × stroke:

F115AET 79.0 × 88.8 mm (3.11 × 3.50 in)
F115AET1 79.0 × 88.8 mm (3.11 × 3.50
in)
F150AET 94.0 × 96.2 mm (3.70 × 3.79 in)
F150AET2 94.0 × 96.2 mm (3.70 × 3.79
in)
F150BET 94.0 × 96.2 mm (3.70 × 3.79 in)
FL115AET 79.0 × 88.8 mm (3.11 × 3.50
in)
FL115AET1 79.0 × 88.8 mm (3.11 × 3.50
in)
FL150AET 94.0 × 96.2 mm (3.70 × 3.79
in)
FL150AET2 94.0 × 96.2 mm (3.70 × 3.79
in)

Ignition system:

TCI

Spark plug (NGK):

F115AET LFR6A-11
F115AET1 LFR6A-11
F150AET LFR5A-11
F150AET2 LFR5A-11
F150BET LFR5A-11
FL115AET LFR6A-11
FL115AET1 LFR6A-11
FL150AET LFR5A-11
FL150AET2 LFR5A-11

Spark plug gap:

1.0–1.1 mm (0.039–0.043 in)

13

Specifications and requirements

Steering system:

Remote steering

Starting system:

Electric starter

Starting carburetion system:

Fuel injection

Valve clearance IN (cold engine):

0.17–0.24 mm (0.0067–0.0094 in)

Valve clearance EX (cold engine):

0.31–0.38 mm (0.0122–0.0150 in)

Cold cranking amps (CCA/EN):

F115AET 430–1080 A
F115AET1 430–1080 A
F150AET 510–1080 A
F150AET2 510–1080 A
F150BET 510–1080 A
FL115AET 430–1080 A
FL115AET1 430–1080 A
FL150AET 510–1080 A
FL150AET2 510–1080 A

Min. rated capacity (20HR/IEC):

F115AET 70 Ah
F115AET1 70 Ah
F150AET 80 Ah
F150AET2 80 Ah
F150BET 80 Ah
FL115AET 70 Ah
FL115AET1 70 Ah
FL150AET 80 Ah
FL150AET2 80 Ah

Maximum generator output:

F115AET 24 A
F115AET1 24 A
F150AET 36 A
F150AET2 36 A
F150BET 36 A
FL115AET 24 A
FL115AET1 24 A
FL150AET 36 A
FL150AET2 36 A

Lower unit:

Gear shift positions:

Forward-neutral-reverse

Gear ratio:

F115AET 2.15(28/13)
F115AET1 2.15(28/13)
F150AET 2.00(28/14)
F150AET2 2.00(28/14)
F150BET 2.00(28/14)
FL115AET 2.15(28/13)
FL115AET1 2.15(28/13)
FL150AET 2.00(28/14)
FL150AET2 2.00(28/14)

Trim and tilt system:

Power trim and tilt

Propeller mark:

F115AET K
F115AET1 K
F150AET M/T
F150AET2 M/T
F150BET M/T
FL115AET KL
FL115AET1 KL
FL150AET ML/TL
FL150AET2 ML/TL

Fuel and oil:

Recommended fuel:

Regular unleaded gasoline

Min. research octane number (RON):

90

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

14

Specifications and requirements

Engine oil quantity (without oil filter
replacement):

F115AET 3.5 L (3.70 US qt, 3.08 Imp.qt)
F115AET1 3.5 L (3.70 US qt,

3.08 Imp.qt)
F150AET 4.3 L (4.55 US qt, 3.78 Imp.qt)
F150AET2 4.3 L (4.55 US qt,

3.78 Imp.qt)
F150BET 4.3 L (4.55 US qt, 3.78 Imp.qt)
FL115AET 3.5 L (3.70 US qt,

3.08 Imp.qt)
FL115AET1 3.5 L (3.70 US qt,

3.08 Imp.qt)
FL150AET 4.3 L (4.55 US qt,

3.78 Imp.qt)
FL150AET2 4.3 L (4.55 US qt,

3.78 Imp.qt)
Engine oil quantity (with oil filter
replacement):

F115AET 3.7 L (3.91 US qt, 3.26 Imp.qt)
F115AET1 3.7 L (3.91 US qt,

3.26 Imp.qt)

F150AET 4.5 L (4.76 US qt, 3.96 Imp.qt)
F150AET2 4.5 L (4.76 US qt,

3.96 Imp.qt)

F150BET 4.5 L (4.76 US qt, 3.96 Imp.qt)
FL115AET 3.7 L (3.91 US qt,

3.26 Imp.qt)

FL115AET1 3.7 L (3.91 US qt,

3.26 Imp.qt)

FL150AET 4.5 L (4.76 US qt,

3.96 Imp.qt)

FL150AET2 4.5 L (4.76 US qt,

3.96 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:

F115AET 0.760 L (0.803 US qt,

0.669 Imp.qt)
F115AET1 0.760 L (0.803 US qt,

0.669 Imp.qt)
F150AET 0.980 L (1.036 US qt,

0.862 Imp.qt)
F150AET2 0.980 L (1.036 US qt,

0.862 Imp.qt)
F150BET 0.980 L (1.036 US qt,

0.862 Imp.qt)
FL115AET 0.715 L (0.756 US qt,

0.629 Imp.qt)
FL115AET1 0.715 L (0.756 US qt,

0.629 Imp.qt)
FL150AET 0.980 L (1.036 US qt,

0.862 Imp.qt)
FL150AET2 0.980 L (1.036 US qt,

0.862 Imp.qt)

Tightening torque:

Spark plug:

25 Nm (2.55 kgf-m, 18.4 ft-lb)

Propeller nut:

54 Nm (5.51 kgf-m, 39.8 ft-lb)

Engine oil drain bolt:

27 Nm (2.75 kgf-m, 19.9 ft-lb)

Engine oil filter:

18 Nm (1.84 kgf-m, 13.3 ft-lb)

Noise and vibration level:

Operator sound pressure level:

F115AET 75.5 dB(A)
F115AET1 75.5 dB(A)
F150AET 79.6 dB(A)
F150AET2 79.6 dB(A)
FL115AET 75.5 dB(A)
FL115AET1 75.5 dB(A)
FL150AET 79.6 dB(A)
FL150AET2 79.6 dB(A)

15

Specifications and requirements

WARNING

WARNING

NOTICE

WARNING

ZMU07305

EMU33555

Installation requirements

EMU33565

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 boats
maximum horsepower rating. See the boat’s
capacity plate or contact the manufacturer.

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 55.

EMU41593

Yamaha Security System (if equipped)

ECM02461

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

The outboard motor with this label is
equipped with the Yamaha Security System
to protect against theft, which consists of the
receiver and remote control transmitter. The
engine can not be started if the security sys­tem is in the lock mode, and only be started
in the unlock mode. Consult your Yamaha
dealer for installation of the receiver.

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.

16

Specifications and requirements

ZMU04606

-

x

123

EMU25695

Battery requirements

EMU25723

Battery specifications

Cold cranking amps (CCA/EN):

F115AET 430–1080 A
F115AET1 430–1080 A
F150AET 510–1080 A
F150AET2 510–1080 A
F150BET 510–1080 A
FL115AET 430–1080 A
FL115AET1 430–1080 A
FL150AET 510–1080 A
FL150AET2 510–1080 A

Min. rated capacity (20HR/IEC):

F115AET 70 Ah
F115AET1 70 Ah
F150AET 80 Ah
F150AET2 80 Ah
F150BET 80 Ah
FL115AET 70 Ah
FL115AET1 70 Ah
FL150AET 80 Ah
FL150AET2 80 Ah

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

EMU36291

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]

EMU36301

Multiple batteries

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

EMU41602

Propeller selection

Next to selecting an outboard motor, select­ing the right propeller is one of the most im­portant purchasing decisions a boater can
make. The type, size, and design of your pro­peller have a direct impact on acceleration,
top speed, fuel economy, and even engine
life. Yamaha designs and manufactures pro­pellers for every Yamaha outboard motor and
every application.
Your Yamaha dealer can help you select the
right propeller for your boating needs. Select
a propeller that will allow the engine to reach
the middle or upper half of the operating
range at full throttle with the maximum boat­load. Generally, select a larger pitch propeller
for a smaller operating load and a smaller
pitch propeller for a heavier load. If you carry
loads that vary widely, select the propeller
that lets the engine run in the proper range for
your maximum load but remember that you
may need to reduce your throttle setting to
stay within the recommended engine speed
range when carrying lighter loads.
Yamaha recommends to use a propeller suit­able for the “Shift Dampener System (SDS)”.
For further information, consult your Yamaha
dealer.
To check the propeller, see page 95.

17

1. Propeller diameter in inches

2. Propeller pitch in inches

Specifications and requirements

ZMU04607

-

x

123

3. Type of propeller (propeller mark)

1. Propeller diameter in inches

2. Propeller pitch in inches

3. Type of propeller (propeller mark)

EMU36312

Counter rotation models

Standard outboard motors rotate clockwise.
Counter rotation models rotate counterclock­wise and are typically used in multiple motor
setups.
On counter rotation models, be sure to use a
propeller intended for counterclockwise rota­tion. These propellers are identified with the
letter “L” after the size indication on the pro­peller. WARNING! Never use a standard

propeller with a counter rotation motor, or
a counter rotation propeller with a stan­dard motor. Otherwise the boat could go
in the direction opposite of that expected
(for example, reverse instead of forward),
which could lead to an accident.

[EWM01811]

For instructions on propeller removal and in­stallation, see page 95 and 96.

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.

EMU43043

Engine oil requirements

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

F115A, FL115A, F115A1, FL115A1

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 (without oil filter
replacement):

3.5 L (3.70 US qt, 3.08 Imp.qt)
Engine oil quantity (with oil filter re­placement):

3.7 L (3.91 US qt, 3.26 Imp.qt)

F150A, FL150A, F150A2, FL150A2, F150B

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 (without oil filter
replacement):

4.3 L (4.55 US qt, 3.78 Imp.qt)
Engine oil quantity (with oil filter re­placement):

4.5 L (4.76 US qt, 3.96 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.

18

Specifications and requirements

NOTICE

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

Recommended engine oil grade 1

Recommended engine oil grade 2

EMU36361

Fuel requirements

EMU40202

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

19

gasoline can seriously damage the en­gine.

 Avoid getting water and contaminants in

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

Gasohol

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

Specifications and requirements

ZMU04863

1

EMU36331

Anti-fouling paint

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

EMU40302

Outboard motor disposal re-

quirements

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

EMU36353

Emergency equipment

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

wrenches (including metric sizes), and
electrical tape.

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

clip.

 Spare parts, such as an extra set of spark

plugs.

Consult your Yamaha dealer for details.

EMU39001

Emission control information

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

EMU25232

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

EMU31562

Approval label of emission control certifi­cate

This label is attached to the bottom cowling.
New Technology; (4-stroke) MFI

F115A1, FL115A1

1. Approval label location

F150A2, FL150A2

1. Approval label location

20

Specifications and requirements

ZMU06895

EMISSION CONTROL INFORMATION MFI

THIS ENGINE CONFORMS TO CALIFORNIA AND U.S. EPA EXHAUST
REGULATIONS FOR SI MARINE ENGINES. REFER TO THE OWNER'S
MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
MEETS U.S. EPA EVAP STANDARDS USING CERTIFIED COMPONENTS.

FAMILY:
DISPLACEMENT: liters
SPARK PLUG:
FUEL: GASOLINE

FELs(HC+NOx / CO)

: / g/kW-hr MAX POWER: kW
IDLE SPEED: ± rpm IN NEUTRAL
SPARK PLUG GAP (mm):
VALVE LASH (mm) IN: EX:

YAMAHA MOTOR CO.,LTD.

INFORMATION ANTIPOLLUTION MFI

CE MOTEUR EST CONFORME AUX NORMES D’ÉMISSIONS EPA DES É.-U. ET DE LA
CALIFORNIE POUR MOTEURS MARINS À ÉTINCELLE. POUR LES SPÉCIFICATIONS ET LES
RÉGLAGES À EFFECTUER, CONSULTEZ LE MANUEL DU PROPRIÉTAIRE. INSTALLÉ AVEC
LES COMPOSANTS HOMOLOGUÉS, IL SATISFAIT AUX NORMES EVAP EPA DES É.-U.

YAMAHA MOTOR CO.,LTD.

FAMILLE :
CYLINDRÉE : litre
BOUGIE :
CARBURANT : ESSENCE

FELs(HC+NOx / CO)

: / g/kW-h PUISS. MAX. : kW
RALENTI : ± tr/mm AU POINT MORT
BOUGIE-ÉCARTEMENT (mm) :
JEU DE SOUPAPES (mm) ADM: ÉCH:

ZMU07389

1

Manufactured:

ZMU04346

ZMU07400

1

EMU25275

Star labels

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

EMU25264

Manufactured date label

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

F115A1, FL115A1

label.

F115A1, FL115A1

1. Manufactured date label location

F150A2, FL150A2

21

1. Manufactured date label location

1. Star labels location

F150A2, FL150A2

1. Star labels location

Specifications and requirements

ZMU01702

ZMU01703

ZMU01704

ZMU05663

EMU40331

One Star—Low Emission

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

EMU40341

Two Stars—Very Low Emission

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

EMU40351

Three Stars—Ultra Low Emission

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

EMU33862

Four Stars—Super Ultra Low Emission

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

22

Components

TIP:

1

2

2

3

4

5
6

7

8

9

11

12

13 14

15 16 17

10

1918

ZMU07387

EMU2579Z

Components diagram

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

F115AET, FL115AET, F115AET1, FL115AET1

1. Top cowling

2. Cowling lock lever(s)

3. Drain screw

4. Anti-cavitation plate

5. Trim tab (anode)

6. Propeller*

7. Cooling water inlet

8. Anode

9. Flushing device

10.Water separator

11.Power trim and tilt switch

12.Remote control box (side mount type)*

13.Remote control box (binnacle mount type)*

14.Switch panel (for use with binnacle type)*

15.Digital speedometer*

23

16.Digital tachometer*

17.Fuel management meter*

18.Remote control transmitter*

19.Receiver*

Components

SET MODE

SET MODE

1

4

6

3

2

5

ZMU07390

1. Tachometer unit (Square type)*

2. Tachometer unit (Round type)*

3. Speedometer unit (Square type)*

4. Speed & fuel meter unit (Square type)*

5. Speed & fuel meter unit (Round type)*

6. Fuel management meter unit (Square type)*

24

Components

1

11

12 13

14 15 16

2

9

10

2

3

4

5

6

7

8

1817

ZMU07417

F150AET, FL150AET, F150AET2, FL150AET2, F150BET

1. Top cowling

2. Cowling lock lever(s)

3. Anti-cavitation plate

4. Trim tab (anode)

5. Propeller*

6. Cooling water inlet

7. Clamp bracket

8. Flushing device

9. Water separator

10.Power trim and tilt switch

11.Remote control box (side mount type)*

12.Remote control box (binnacle mount type)*

13.Switch panel (for use with binnacle type)*

14.Digital speedometer*

15.Digital tachometer*

16.Fuel management meter*

17.Remote control transmitter*

18.Receiver*

25

Components

SET MODE

SET MODE

1

4

6

3

2

5

ZMU05429

1. Tachometer unit (Square type)*

2. Tachometer unit (Round type)*

3. Speedometer unit (Square type)*

4. Speed & fuel meter unit (Square type)*

5. Speed & fuel meter unit (Round type)*

6. Fuel management meter unit (Square type)*

26

Components

NOTICE

TIP:

ZMU06455

EMU38592

Remote control transmitter (if
equipped)

The lock and unlock modes of the Yamaha
Security System are selected using the re­mote control transmitter. While the engine is
running, input from the remote control trans­mitter is not received.

Store the remote control transmitter carefully
so it will not be lost.

ECM02101

 The remote control transmitter is not

completely waterproof. Do not sub­merge the transmitter or operate it un­derwater. If the transmitter is
submerged, dry it with a soft, dry cloth,
and then check that it is operating prop­erly. If the transmitter is not operating
properly, contact a Yamaha dealer.

 Keep the remote control transmitter

away from high temperatures and do
not place it in direct sunlight.

 Do not drop the remote control trans-

mitter, subject it to strong shocks, or
place any heavy items on it.

 Use a soft, dry cloth to clean the remote

control transmitter. Do not use deter­gent, alcohol, or other chemicals.

 Do not attempt to disassemble the re-

mote control transmitter yourself. Oth­erwise, the transmitter may not operate
properly. If the transmitter needs a new
battery, contact a Yamaha dealer.

 If you have lost the remote control trans-

mitter, consult your Yamaha dealer.
Keep the least 2 transmitters at all the
time. If you have lost both transmitters,
consult your Yamaha dealer.

 Since the receiver is programmed to rec-

ognize the internal code from this transmit­ter only, the security system setting can
only be changed with this transmitter. If the
remote control transmitter does not oper­ate properly, contact a Yamaha dealer.

 Replace the battery cell after 1 year, and

every two years thereafter as a standard
measure.

 Refer to local hazardous waste regulations

when disposing of transmitter batteries.

 The Yamaha Security System permits to

register up to 5 remote control transmit­ters. Consult your yamaha dealer for de­tails.

EMU38602

Receiver (if equipped)

The receiver control the ECM (Electronic con­trol module) to prevent the engine from start­ing. Consult your Yamaha dealer for
installation of the receiver.

EMU38612

Yamaha Security System lock and un­lock mode (if equipped)

The Yamaha Security System settings are se­lected by pressing the lock or unlock button
on the remote control transmitter briefly.

27

Components

12

ZMU06456

2

3

2

1

4

ZMU04569

1. Lock button

2. Unlock button

LOCK

When the lock button on the remote control
transmitter is pressed briefly, the beeper
sounds once. This indicates the lock mode is
selected and the engine cannot be started.
The lock mode is selected only when the
main switch is in the “ ” (off) position. The
engine cranks but can not be started while
the Yamaha Security System is on lock
mode.

UNLOCK

When the unlock button on the remote con­trol transmitter is pressed briefly, the beeper
sounds twice. This indicates the unlock mode
is selected and the engine can be started.

Yam ah a
Security

System

mode

Lock 1 beep “ ” NO

Unlock 2 beeps

EMU26182

Number

of beeps

Main

switch

“”/

“”

Engine
can be
started

YES

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 trim and tilt switch

2. Remote control lever

3. Neutral interlock trigger

4. Neutral throttle lever

5. Main switch

6. Engine shut-off switch

7. Throttle friction adjuster

1. Remote control lever

2. Power trim and tilt switch

3. Free accelerator

4. Throttle friction adjuster

EMU26191

Remote control lever

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

28

Components

TIP:

N

1

F

7

6

2

R

3

4

4

6

5

7

5

ZMU04573

1. Neutral “ ”

2. Forward “ ”

3. Reverse “ ”

4. Shift

5. Fully closed

6. Throttle

7. Fully open

1. Neutral “ ”

2. Forward “ ”

3. Reverse “ ”

4. Shift

5. Fully closed

6. Throttle

7. Fully open

EMU26202

Neutral interlock trigger

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

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.

1. Fully open

2. Fully closed

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

EMU26234

Free accelerator

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

29

TIP:

1. Fully open

1

3

2

ZMU04575

2. Fully closed

3. Free accelerator

Components

EMU25925

Gear shift lever (if equipped)

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

 The free accelerator button can only be

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

 After the button is pushed, the throttle be-

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

 After using the free accelerator, return the

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

EMU25914

Tiller handle (if equipped)

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

1. Neutral “ ”

2. Forward “ ”

3. Reverse “ ”

EMU25943

Throttle grip (if equipped)

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

EMU25963

Throttle indicator (if equipped)

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.

30

Components

ZMU04646

1. Throttle indicator

EMU25977

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]

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.

31

Also, without engine power, the boat

ON

START

OFF

ON

START

OFF

1

ZMU04564

2

3

could slow rapidly. This could cause peo­ple and objects in the boat to be thrown
forward.

1. Engine shut-off cord (lanyard)

2. Clip

3. Engine shut-off switch

[EWM00123]

Components

1. Engine shut-off cord (lanyard)

2. Clip

3. Engine shut-off switch

EMU26004

Engine stop button (if equipped)

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

1. Engine shut-off cord (lanyard)

2. Clip

3. Engine shut-off switch

EMU26092

Main switch

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

32

Components

WARNING

TIP:

ON

OFF

START

ON

OFF

START

ZMU04566

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.

EMU26113

Steering friction adjuster (if equipped)

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.

 Check the tiller handle for smooth move-

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

 Do not apply lubricants such as grease to

the friction areas of the steering friction ad­juster.

EMU26144

Power trim and tilt switch on remote
control or tiller handle

The power trim and tilt system adjusts the
outboard motor angle in relation to the tran­som. Pressing the switch “ ” (up) trims the
outboard motor up, and then tilts it up. Press­ing the switch “ ” (down) tilts the outboard
motor down and trims it down. When the
switch is released, the outboard motor will
stop in its current position.
For instructions on using the power trim and
tilt switch, see pages 72 and 74.

33

EMU26156

WARNING

UP

DN

ZMU04223

1

ZMU04601

DN

UP

1

Power trim and tilt switch on bottom
cowling

The power trim and tilt switch is located on
the side of the bottom cowling. Pushing the
switch “ ” (up) trims the outboard motor up,
and then tilts it up. Pushing the switch “ ”
(down) tilts the outboard motor down and
trims it down. When the switch is released,
the outboard motor will stop in its current po­sition.
For instructions on using the power trim and
tilt switch, see page 74.

EWM01032

Components

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

1. Power trim and tilt switch

EMU26164

Power trim and tilt switches (twin bin­nacle type)

The power trim and tilt system adjusts the
outboard motor angle in relation to the tran­som. Pushing the switch “ ” (up) trims the
outboard motor up, and then tilts it up. Press­ing the switch “ ” (down) tilts the outboard
motor down and trims it down. When the
switch is released, the outboard motor will
stop in its current position. For instructions
on using the power trim and tilt switches, see
pages 72 and 74.

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

1. Power trim and tilt switch

34

Components

TIP:

WARNING

NOTICE

On the dual engine control, the switch on the
remote control grip controls both outboard
motors at the same time.

EMU26245

Trim tab with anode

EWM00841

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

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

ECM00841

1. Trim tab

2. Bolt

3. Cap

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

35

Bolt tightening torque:

42 Nm (4.28 kgf-m, 31.0 ft-lb)

EMU26342

Tilt support lever for power trim and
tilt model

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

Components

NOTICE

ZMU07402

1

ZMU05348

1

1

ZMU07356

1

ZMU07375

1. Tilt support lever

ECM00661

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

EMU26385

Cowling lock lever (pull up type)

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

F115A, FL115A, F115A1, FL115A1

1. Cowling lock lever(s)

1. Cowling lock lever(s)

F150A, FL150A, F150A2, FL150A2, F150B

1. Cowling lock lever(s)

1. Cowling lock lever(s)

EMU26464

Flushing device

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

36

Components

TIP:

1

ZMU04256

ZMU07478

F115A, FL115A, F115A1, FL115A1

1. Flushing device

F150A, FL150A, F150A2, FL150A2, F150B

1. Flushing device

For details on usage, see page 82.

EMU35564

Fuel filter/Water separator

This engine has a combination fuel filter/wa­ter separator and associated alert system. If
water separated from the fuel exceeds a spe­cific volume, the alert device of 6Y8 Multi­function Tachometer will activate.

F115A, FL115A, F115A1, FL115A1

F150A, FL150A, F150A2, FL150A2, F150B

Activation of alert device
 The water separator-alert indicator of 6Y8

Multifunction Tachometer will blink.

 The buzzer will sound intermittently only

when the gear shift is in neutral.

 If the alert system has activated, stop the

engine and consult a Yamaha dealer imme­diately.

EMU26305

Alert indicator (if equipped)

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 53.

37

1. Alert indicator

Components

38

Instruments and indicators

NOTICE

NOTICE

TIP:

ZMU01840

1

5

2

4

3

6

7

EMU36016

Indicators (if equipped)

EMU36025

Low oil pressure-alert indicator

If oil pressure drops too low, this indicator will
light up. For further information, see page 53.

ECM00023

 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 remaining oil
quantity. For further information, see
page 59.

1. Overheat-alert indicator

EMU31415

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

Digital tachometer

1. Low oil pressure-alert indicator

EMU36034

Overheat-alert indicator

If the engine temperature rises too high, this
indicator will light up. For further information
on reading the indicator, see page 53.

ECM00053

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

39

1. Tachometer

2. Trim meter

3. Hour meter

4. Low oil pressure-alert indicator

5. Overheat-alert indicator

6. Set button

7. Mode button

The water separator-alert indicator and en­gine trouble-alert indicator on the digital ta­chometer do not operate for this engine.

Instruments and indicators

NOTICE

ZMU01740

ZMU01741

EMU36051

Tachometer

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

EMU26622

Trim meter

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

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

 If the trim angle of your motor exceeds the

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

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

EMU26525

Low oil pressure-alert indicator

If oil pressure drops too low, the alert indica­tor will start to blink. For further information,
see page 53.

ECM00023

EMU26652

Hour meter

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

 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 remaining oil
quantity. For further information, see
page 59.

40

Instruments and indicators

NOTICE

ZMU01736

1

ZMU01737

1

1. Low oil pressure-alert indicator

EMU26584

Overheat-alert indicator

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

53.

ECM00053

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

1. Overheat-alert indicator

EMU26603

Digital speedometer

This gauge shows the boat speed and other
information.

1. Speedometer

2. Fuel gauge

3. Trip meter/clock/voltmeter

4. Alert indicator(s)

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

EMU36062

Speedometer

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

1. Cap

2. Selector switch (for speed unit)

3. Selector switch (for fuel sensor)

EMU26714

Fuel gauge

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

41

Instruments and indicators

ZMU01745

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

fuel can damage the engine.

EMU36072

[ECM01771]

Trip meter / Clock / Voltmeter

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

EMU26692

Trip meter

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

EMU26702

Clock

To set the clock:

1. Be sure the gauge is in the “ ” (time)
mode.

2. Press the “ ” (set) button; the hour dis­play will begin blinking.

3. Press the “ ” (mode) button until the
desired hour is displayed.

4. Press the “ ” (set) button again, the
minute display will begin blinking.

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

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

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

EMU36081

Voltmeter

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

42

Instruments and indicators

ZMU01748

1

2

3

EMU26722

Fuel level-alert indicator

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

damage the engine.

1. Fuel level-alert segment

EMU26733

Low battery voltage-alert indicator

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

[ECM01771]

1. Fuel flow meter

2. Fuel consumption meter / Fuel economy

3. Water separator-alert indicator (operates

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

EMU26753

Fuel flow meter

The fuel flow meter displays the amount of
fuel flow over a one-hour period, at the cur­rent rate of engine operation.
 The fuel flow meter displays gallons/hour

meter / Twin engine speed synchronizer

only if the sensor has been installed)

or liters/hour according to operator prefer­ence. Select the desired units of measure­ment by setting the selector switch on the
back of the gauge during installation.

1. Low battery indicator

EMU26742

Fuel management meter

The fuel management meter shows the state
of the fuel consumption while the engine is
running.

43

1. Selector switch

 The fuel consumption meter and fuel econ-

omy meter will indicate the same unit of
measurement.

Instruments and indicators

ZMU01749

ZMU01751

ZMU01752

Fuel flow readings are not accurate when the
engine is operating under about 1300 r/min.
As the fuel pump cycles on and off, the dis­play indicates either no fuel flow or higher
flow than the actual average use.
Dual engine users: the fuel flow meter can
display the fuel flow of either or both engines.

To change the fuel flow display, press the
“ ” (set) button repeatedly until the gauge
displays “ ” (for fuel flow to the starboard en­gine only), “ ” (for fuel flow to the port engine
only), or “ ” (for total fuel flow both en­gines).

EMU36091

Fuel consumption meter / Fuel econo­my meter / Twin engine speed syn­chronizer

The display shows either the fuel consump­tion meter, the fuel economy meter, or the
twin engine synchronizer.
To change the display, press the “ ”
(mode) button repeatedly until the indicator
on the face of the gauge points to “ ” (fuel
consumption meter), “ ” (fuel economy
meter), or “ ” (twin engine speed syn­chronizer).

EMU26762

Fuel consumption meter

This gauge displays the total amount of fuel
consumed since the gauge was last reset.

To reset the total fuel consumption meter to
zero, press the “ ” (set) and “ ” (mode)
buttons at the same time.

EMU26772

Fuel economy

This gauge displays the approximate dis­tance per liter or gallon when cruising.

If twin engines are installed on your boat, the
gauge will only display the total fuel economy
of both engines.
 Fuel consumption varies greatly with boat

design, weight, propeller used, engine trim
angle, sea conditions (including wind), and
throttle position. Fuel consumption also
varies slightly with the type of water (salt,
fresh, and contaminate levels), air temper­ature and humidity, cleanliness of the boat
bottom, engine mounting height, skill of the
operator, and individual gasoline formula­tion (winter or summer fuel and amount of
additives).

44

Instruments and indicators

ZMU01753

ZMU01754

1

2

3

4

5

ZMU01755

 The Yamaha digital speedometer and fuel

management meter calculates speed,
miles traveled, and fuel economy by water
movement at the stern of the boat. This dis­tance can vary greatly from the actual dis­tance traveled because of water currents,
sea swells, and the condition of the water
speed sensor (if partially plugged or dam­aged).

 Individual engines may slightly vary in their

fuel consumption due to manufacturing
variations. These variations can be even
greater if the engines are of different year
models. In addition, variations in propel­lers, even of the same basic dimensions of
the same design, can also cause a slight
variation in fuel consumption.

EMU26783

Twin-engine speed synchronizer

This gauge displays the difference in engine
speed (r/min) between the port and starboard
engines for reference purposes when syn­chronizing the two engines’ speeds.

1. Port engine speed is higher

2. Port engine speed is slightly higher

3. Engine speed is synchronized evenly be-

4. Starboard engine speed is slightly higher

5. Starboard engine speed is higher

If the two engines’ speeds are not synchro­nized while cruising, adjusting trim angle or
throttle can synchronize them.
If large differences in trim angle or throttle are
needed to synchronize the engines, consult
your Yamaha dealer for adjustments to the
throttle cables.

EMU26794

Water separator-alert indicator

This indicator will blink when water has accu­mulated in the water separator. In such an
event, stop the engine and drain the water
from the separator.
This indicator only operates when a water
separator sensor is equipped.

tween port and starboard engines

45

Instruments and indicators

2

1

ZMU05415

2

3

1

4

5

6

7

8

ZMU05416

SET MODE

1 2

ZMU05417

EMU31654

6Y8 Multifunction meters

Multifunction meters have 6 kinds of meter
units; tachometer unit (square or round
types), speedometer unit (square type),
speed & fuel meter unit (square or round
types), and fuel management meter (square
type). The indicator system is slightly different
between the round and square types. Check
the model and type of your unit carefully. This
manual describes mainly the alert indicators.
For more details on setting meters or chang­ing indicator systems, see the attached oper­ation manual.

EMU36185

6Y8 Multifunction tachometers

The tachometer shows the engine revolutions
per minute. It has functions of trim meter, ad­justing trolling speed, cooling water/engine
temperature display, battery voltage display,
total hour/trip hour display, oil pressure dis­play, water detection alert, engine trouble
alert, and periodic maintenance notification.
If the cooling water pressure sensor is in­stalled, the unit can also show the cooling
water pressure display. However, even if the
cooling water pressure sensor is not in­stalled, the cooling water pressure display
can be shown by connecting an optional sen­sor to the unit. For the optional sensor, con­sult your Yamaha dealer. The tachometer unit
is available in round or square types. Check
your tachometer unit type.

1. Set button

2. Mode button

1. Tachometer

2. Trim meter

3. Multifunction display

4. Cooling water pressure

5. Cooling water/engine temperature

6. Water detection-alert indicator

7. Battery voltage

8. Oil pressure (4-stroke models)

1. Set button

2. Mode button

46

Instruments and indicators

TIP:

110

9 8 7 6

2 3 4

5

ZMU05418

ZMU06457

SET MODE

ZMU06458

ZMU06459

Unlock mode

1. Tachometer

2. Water detection-alert indicator

3. Engine trouble alert/maintenance indicator

4. Trim meter

5. Multifunction display

6. Battery voltage

7. Cooling water/engine temperature

8. Oil pressure (4-stroke models)

9. Cooling water pressure

10.YAMAHA SECURITY SYSTEM indicator

EMU36191

Start-up checks

Place the remote control lever / gear shift le­ver in neutral and turn the main switch to “ ”
(on). After all the displays come on and the to­tal hour display comes on, the gauge will
change to normal operation. If the buzzer
sounds and the water separator-alert indica­tor blinks, consult your Yamaha dealer imme­diately.

Lock mode

To stop the buzzer, press the “ ” (set) or
“ ” (mode) button.

EMU38623

Yamaha Security System information
(if equipped)

Turn the main switch to the “ ” (on) position,
the currently selected Yamaha Security Sys­tem mode (Lock / Unlock) will show on the
display.

47

Instruments and indicators

NOTICE

SET MODE

1

ZMU06460

ZMU05430

ZMU05431

ZMU05421

ZMU05422

1. YAMAHA SECURITY SYSTEM indicator

EMU36131

Low oil pressure-alert

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

has activated while the appropriate engine oil
quantity is maintained, consult your Yamaha
dealer.

ECM01602

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

EMU36222

Overheat alert

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

Stop the engine immediately if the buzzer
sounds and the low oil pressure-alert indica­tor blinks. Check the engine oil quantity and
replenish oil if necessary. If the alert device

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

48

Instruments and indicators

NOTICE

NOTICE

NOTICE

ZMU05423

ZMU05424

ZMU05425

ZMU05426

ECM01593

 Do not continue to run the engine if the

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

 Do not continue to operate the engine if

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

EMU36151

Water separator alert

This indicator will blink if water has accumu­lated in the water separator (fuel filter) while
cruising. In such an event, stop the engine
immediately and see page 105 of this manual
to drain the water from the fuel filter. Get back
to the port soon and consult a Yamaha dealer
immediately.

ECM00911

Gasoline mixed with water could cause
damage to the engine.

EMU36161

Engine trouble alert

This indicator will blink if the engine malfunc­tions while cruising. Get back to the port
soon and consult a Yamaha dealer immedi­ately.

49

ECM00921

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

EMU36171

Low battery voltage-alert

If the battery voltage drops, the low battery
voltage-alert indicator and the battery voltage
value will start to blink. Get back to the port

Instruments and indicators

ZMU05427

ZMU05428

2

1

ZMU05432

1

2

3

ZMU05433

soon if the low battery voltage-alert device
has activated. For charging the battery, con­sult your Yamaha dealer.

EMU36233

6Y8 Multifunction speed & fuel

meters

The speed & fuel meter unit shows the boat
speed and has the functions of fuel meter, to­tal fuel consumption display, fuel economy
display, fuel flow display, and system voltage
display. The chosen display is selected by
using the “ ” (set) and “ ” (mode) but­tons as described in this section. If the speed
sensor is installed, the unit can also show the
trip display. However, even if the speed sen­sor is not installed, the trip display can be
shown by connecting an optional sensor to
the unit. In addition, if optional sensors are
connected to the unit, water surface temper-

ature display, depth display, and clock will
also be available. For the optional sensors,
consult your Yamaha dealer.
The speed & fuel meter unit is available in
round or square types. Check your speed &
fuel meter unit type for operation information.
After the main switch is first turned on, all the
displays come on as a test. After a few sec­onds, the gauge will change to normal oper­ation.
For more information, see the operation man­ual originally supplied with the meter.

1. Set button

2. Mode button

1. Speedometer

2. Fuel meter

3. Multifunction display

50

Instruments and indicators

SET MODE

1 2

ZMU05434

1

3

2

ZMU05435

2

1

ZMU05436

1

2

3

ZMU05437

1. Set button

2. Mode button

1. Speedometer

2. Fuel meter

3. Multifunction display

EMU36242

6Y8 Multifunction speedome-

ters

The speedometer unit shows the boat speed
and has functions of fuel meter and system
voltage display. The chosen display is select­ed by using the “ ” (set) and “ ” (mode)
buttons as described in this section. In addi­tion, the speedometer can show the desired
unit of measurement such as km/h, mph, or
knots. If the speed sensor is installed, the unit
can also show the trip display. However,
even if the speed sensor is not installed, the
trip display can be shown by connecting an
optional sensor to the unit. In addition, if op­tional sensors are connected to the unit, wa­ter surface temperature display, depth

51

display, and clock will also be available. For
the optional sensors, consult your Yamaha
dealer.
After the main switch is first turned on, all the
displays come on as a test. After a few sec­onds, the gauge will change to normal oper­ation.
For more information, see the operation man­ual originally supplied with the meter.

1. Set button

2. Mode button

1. Speedometer

2. Fuel meter

3. Multifunction display

EMU36251

6Y8 Multifunction fuel manage-

ment meters

The fuel management meter has the func­tions of fuel flow meter, total consumption
display, fuel economy display, and remaining
fuel display. The chosen display is selected
by using the “ ” (set) and “ ” (mode)

Instruments and indicators

2

1

ZMU05438

1

2

ZMU05439

buttons as described in this section. For
more information, see the operation manual
originally supplied with the meter.
After the main switch is first turned on, all the
displays come on as a test. After a few sec­onds, the gauge will change to normal oper­ation.
For more information, see the operation man­ual originally supplied with the meter.

1. Set button

2. Mode button

1. Fuel flow meter

2. Multifunction display

52

Engine control system

NOTICE

ZMU01757

OFF STARTONOFF START

ON

ZMU04584

ZMU02630

EMU26804

Alert system

ECM00092

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

EMU30347

Overheat alert (twin engines)

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

crease to 2000–3500 r/min.

 The overheat-alert indicator will light or

blink.

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

water inlet is submerged.

 Check the cooling water inlet for clogging.

 The buzzer will sound.

53

Dual engine drive users:
If the overheat alert system of one engine ac­tivates, the engine will slow down. To switch
off the alert activation on the engine not af­fected by overheating, turn off the main
switch of the engine overheating. If the alert
system has activated, stop the engine and tilt
the outboard motor up to check the cooling
water inlet for clogging. If the alert system has
still activated, tilt the overheated outboard
motor up and return to the port.

EMU30357

Low oil pressure alert

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

 The engine speed will automatically de-

ZMU01828

OFF STARTONOFF START

ON

ZMU04584

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

 The buzzer will sound.

Engine control system

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.

54

Installation

WARNING

ZMU01760

1

EMU26903

Installation

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

EWM01591

 Overpowering a boat could cause se-

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

 Improper mounting of the outboard mo-

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

EMU33482

Mounting the outboard motor

The outboard motor should be mounted so
that the boat is well balanced. Otherwise, the
boat could be hard to steer. For single-engine
boats, mount the outboard motor on the cen­terline (keel line) of the boat. For twin engine
boats, mount the outboard motors equidis­tant from the centerline. Consult your
Yamaha dealer or boat manufacturer for fur­ther information on determining the proper
mounting location.

1. Center line (keel line)

1. Center line (keel line)

EMU26935

Mounting height (boat bottom)

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

55

Yamaha dealer or boat manufacturer for fur-

NOTICE

ZMU01762

ther information on determining the proper
mounting height.

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

Installation

56

Operation

TIP:

WARNING

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 59.

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
life. NOTICE: Failure to follow the break-in

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

[ECM01782]

[ECM00802]

EMU27086

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.

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 72).

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.

57

Operation

NOTICE

WARNING

WARNING

ZMU07403

ZMU06107

ZMU07376

ZMU07377

ECM00121

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

EMU36422

Fuel level

Be sure you have plenty of fuel for your trip. A
good rule is to use 1/3 of your fuel to get to
the destination, 1/3 to return, and to keep 1/3
as an emergency reserve. With the boat level
on a trailer or in the water, turn the key to “ ”
(on) and check the fuel level. For fuel filling in­structions, see page 64.

EMU36433

Remove cowling

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

F115A, FL115A, F115A1, FL115A1

F150A, FL150A, F150A2, FL150A2, F150B

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 me­chanic. Improper repairs can make the
outboard unsafe to operate.

EMU36452

Check for fuel leaks

 Check for fuel leaks or gasoline fumes in

the boat.

58

Operation

ZMU07478

ZMU06873

1

2

 Check for fuel leakage from the fuel sys-

tem.

 Check the fuel tank and fuel lines for

cracks, swellings, or other damages.

EMU37323

Checking the fuel filter

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

F115A, FL115A, F115A1, FL115A1

F150A, FL150A, F150A2, FL150A2, F150B

 Look for loose or damaged connections of

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

left. Make sure operation is smooth and un-

restricted throughout the whole range with

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

make sure there is no hesitation in their

travel. Operation should be smooth over

the complete range of motion, and each le-

ver should return completely to the idle po-

sition.
 Look for loose or damaged connections of

the throttle and shift cables.

EMU36484

Engine shut-off cord (lanyard)

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

EMU36903

Controls

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

right to make sure operation is smooth.

 Turn the throttle grip from the fully closed

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

59

1. Clip

2. Engine shut-off cord (lanyard)

EMU37054

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.

Operation

ZMU04257

1

ZMU02082

1

3

2

ZMU06221

1

1

3

2

ZMU07056

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
level mark and lower level mark. Consult
your Yamaha dealer if the oil level is out
of specified level or if it appears milky or
dirty.

F115A, FL115A, F115A1, FL115A1

1. Oil dipstick

1. Lower mark

2. Oil dipstick

3. Upper mark

F150A, FL150A, F150A2, FL150A2, F150B

1. Oil dipstick

1. Oil dipstick

2. Lower mark

3. Upper mark

EMU27154

Engine

 Check the engine and engine mounting.
 Look for loose or damaged fasteners.
 Check the propeller for damage.
 Check for engine oil leaks.

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]

60

Operation

2

ZMU06053

1

ZMU06159

12

ZMU07404

ZMU06132

F115A, FL115A, F115A1, FL115A1

1. Fitting

2. Flushing device

F150A, FL150A, F150A2, FL150A2, F150B

1. Fitting

2. Flushing device

EMU42781

Install cowling

F115A, FL115A, F115A1, FL115A1

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

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

3. Place the top cowling on bottom cowl­ing.

4. Check to be sure the rubber seal fits cor­rectly all the way around the engine.

5. Move the levers to lock the 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.

[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.

F150A, FL150A, F150A2, FL150A2, F150B

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

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

3. Place the cowling on top of the seal.

61

4. Check to be sure it fits properly in the

WARNING

ZMU07378

ZMU07379

rubber seal.

5. Move the levers to lock the 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.

[ECM01992]

Operation

EMU2915A

Checking power trim and tilt system

EWM01931

 Never get under the lower unit while it is

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

 Body parts can be crushed between the

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

 Be sure no one is near the outboard mo-

tor before performing this check.

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

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

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

62

Operation

ZMU03458

1

2

1

ZMU07380

ZMU03452

ZMU02635

1. Tilt rod

2. Trim rods

4. Use the tilt support lever to lock the mo­tor in the up position. Operate the tilt
down switch briefly so the motor is sup­ported by the tilt support lever.

1. Tilt support lever

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

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

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

8. Tilt the outboard motor down. Check
that the tilt rod and trim rods operate
smoothly.

EMU36583

Battery

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

63

Operation

WARNING

WARNING

EMU30027

Filling fuel

EWM01831

 Gasoline and its vapors are highly flam-

mable and explosive. Always refuel ac­cording 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 gas­oline in your eyes, see your doctor im­mediately. If gasoline spills on your skin,
wash with soap and water. If gasoline
spills on your clothing, change your
clothes.

1. Make sure that the engine is stopped.

2. Make sure that the boat is in a well-ven­tilated outdoor area, either securely
moored or trailered.

3. Make sure that no one is in the boat.

4. Do not smoke and keep away from
sparks, flames, static electric discharge,
or other sources of ignition.

5. If you use a portable container to store
and dispense fuel, only use a locally ap­proved GASOLINE container.

6. Touch the fuel nozzle to the filler opening
or funnel to help prevent electrostatic
sparks.

7. Fill the fuel tank, but do not overfill.

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

8. Tighten the fuel tank cap securely.

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

[EWM02611]

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. Gaso­line 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. Symp­toms include nausea, dizziness, and
drowsiness. Keep cockpit and cabin ar­eas well ventilated. Avoid blocking ex­haust outlets.

EMU27485

Sending fuel

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

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

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

64

Operation

WARNING

WARNING

TIP:

TIP:

1. Arrow

EMU27495

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.

EMU38631

Electric start / prime start models

EWM01841

1. If the lock mode of the Yamaha Security
System is selected, use the remote con­trol transmitter to select the unlock
mode. Short beep will sound twice when
unlocking the Yamaha Security System.
For further information, see page 27.

 If you lost track of the current security

mode, press the lock or unlock button to
reset the security system.

 The signal transmission range of the re-

mote control transmitter varies depending
on the mounting position of the receiver. To
operate the Yamaha Security System cor­rectly, use the transmitter as close as pos­sible from the receiver.

 If Yamaha Security System may not oper-

ate correctly, repeat the activating proce­dure once again.

2. Place the gear shift lever in neutral.

 Failure to attached 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.

65

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

3. Attach the engine shut-off cord to a se­cure 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.

Operation

TIP:

WARNING

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

[ECM00193]

4. Place the throttle grip in the “ ”
(start) position. After the engine starts,
return the throttle to the fully closed po­sition.

5. Turn the main switch to “ ” (start).

6. Immediately after the engine starts, re­lease the main switch and allow it to re­turn to “ ” (on). NOTICE: Never turn

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

 When the engine is cold, it needs to be

warmed up. For further information, see
page 69.

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

the throttle slightly and try to start the en­gine again. If the engine still fails to start,
see page 102.

EMU42421

Electric start and remote control models

EWM01841

 Failure to attached 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. If the lock mode of the Yamaha Security
System is selected, use the remote con­trol transmitter to select the unlock
mode. Short beep will sound twice when

66

Operation

TIP:

TIP:

N

ZMU04588

ON

START

OFF

ON

START

OFF

ZMU04589

unlocking the Yamaha Security System.
For further information, see page 27.

 If you lost track of the current security

mode, press the lock or unlock button to
reset the security system.

 The signal transmission range of the re-

mote control transmitter varies depending
on the mounting position of the receiver. To
operate the Yamaha Security System cor­rectly, use the transmitter as close as pos­sible from the receiver.

 If Yamaha Security System may not oper-

ate correctly, repeat the activating proce­dure once again.

2. Place the remote control lever in “ ”
(neutral).

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

3. Attach the engine shut-off cord to a se­cure 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.

67

4. Turn the main switch to “ ” (on).

TIP:

Dual engine users: When the main switch is

NOTICE

START

ON

ZMU04590

turned on, the buzzer operates for a few sec­onds then stops automatically. The buzzer
also operates if one of the engines stalls.

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

Operation

seconds of cranking, return the main
switch to “ ” (on), wait 10 seconds,
then crank the engine again.

EMU36511

Checks after starting engine

EMU36524

Cooling water

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

ECM01811

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

[ECM00193]

6. Immediately after the engine starts, re­lease the main switch to return it to “ ”
(on). NOTICE: Never turn the main

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

68

Operation

WARNING

NOTICE

EMU27671

Warming up engine

EMU30038

Electric start models

1. After starting the engine, allow it to idle
for 3 minutes to warm up to provide max­imum operating performance and accel­eration. Failure to do so will shorten
engine life.

2. Be sure the low oil pressure-alert indica­tor remains 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

[ECM01832]

Checks after engine warm up

EMU36542

Shifting

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

EMU36981

Stop switches

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

engine stop button and make sure the en­gine 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 shut­off switch.

EMU33493

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).

1. Neutral interlock trigger

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

69

Operation

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.

70

Operation

WARNING

N

ZMU04588

 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.

EMU27822

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.

EMU38652

Procedure

1. Push and hold the engine stop button or
turn the main switch to “ ” (off).

EMU31743

Stopping boat

EWM01511

 Do not use the reverse function to slow

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

71

2. After stopping the engine, disconnect

TIP:

WARNING

OFF

ON

OFF

ON

ZMU04600

the fuel line if there is a fuel joint on the
outboard motor.

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

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

5. When you leave your boat, set the
Yamaha Security System to the lock
mode by pressing the lock button of the
remote control transmitter. Short beep
will sound once when locking the securi­ty system. The lock mode is selected
only when the main switch is in the “ ”
(off) position. For further information, see
page 27. WARNING! Do not set the

Yamaha Security System in the lock
mode when you stop the engine at off­shore.

[EWM02151]

Operation

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).

EMU27863

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.

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.

1. Trim operating angle

72

Operation

WARNING

DN

UP

1

ZMU07381

EMU27889

Adjusting trim angle (Power trim and
tilt)

EWM00754

 Be sure all people are clear of the out-

board motor when adjusting the trim an­gle. 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 gradu­ally and watch for any signs of instability
or control problems. Improper trim an­gle can cause loss of control.

 If equipped with a power trim and tilt

switch located on the bottom cowling,
use the switch only when the boat is at a
complete stop with the engine off. Do
not adjust the trim angle with this switch
while the boat is moving.

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

1. Power trim and tilt switch

1. Power trim and tilt switch

1. Power trim and tilt switch

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

EMU27913

Adjusting boat trim

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

73

Bow Up

TIP:

WARNING

WARNING

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

Operation

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

EMU27936

Tilting up and down

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

EWM00223

Bow Down

Too much trim-in causes the boat to “plow”
through the water, decreasing fuel economy
and making it hard to increase speed. Oper­ating with excessive trim-in at higher speeds
also makes the boat unstable. Resistance at
the bow is greatly increased, heightening the
danger of “bow steering” and making opera­tion difficult and dangerous.

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

EWM00251

Leaking fuel is a fire hazard. If there is a
fuel joint on the outboard motor, discon­nect the fuel line or close the fuel cock if
the engine will be tilted for more than a
few minutes. Otherwise fuel may leak.

74

Operation

NOTICE

N

ZMU07382

UP

ZMU07383

ECM00242

 Before tilting the outboard motor, stop

the engine by following the procedure
on page 71. Never tilt the outboard mo­tor 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.

EMU42692

Procedure for tilting up (power trim
and tilt models)

1. Place the remote control lever / gear shift
lever in neutral.

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

75

3. Pull the tilt support lever toward you to

UP

ZMU07384

ZMU07385

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

[EWM00263] NOTICE: Do not use the

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

79.

[ECM01642]

Operation

4. Once the outboard motor is supported
with the tilt support lever, press the pow­er trim and tilt switch “ ” (down) to re­tract the trim rods. NOTICE: Make sure

that the trim rods retracts completely
during mooring. This protects the rods
from marine growth and corrosion,
which could damage the power trim
and tilt mechanism.

EMU42702

Procedure for tilting down

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

2. Release the tilt support lever.

[ECM00253]

76

Operation

NOTICE

DN

ZMU01936

UP

DN

ZMU04603

DN

DN

ZMU04255

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

EMU28063

Shallow water

EMU32852

Power trim and tilt models

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

ECM00261

77

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.

EMU32914

Procedure for power trim and tilt models

1. Place the remote control lever / gear shift
lever in neutral.

2. Slightly tilt the outboard motor up to the

N

ZMU04588

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

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

[EWM01851]

Operation

3. To return the outboard motor to the nor­mal running position, press the power
trim and tilt switch and slowly tilt the out­board motor down.

EMU28196

Cruising in other conditions

Cruising in salt water

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

Cruising in muddy, turbid, or acidic water

Yamaha strongly recommends that you use
the optional chromium-plated water pump kit
(see page 19) 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.

78

Maintenance

WARNING

NOTICE

NOTICE

EMU31845

Transporting and storing out-

board motor

EWM02641

 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. Tighten se-

curely the fuel valve when transporting
and storing the outboard motor.

 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

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.

Leaking fuel is a fire hazard. When trailering
the boat, close the fuel valve to prevent fuel
from leaking.
The outboard motor should be transported
and stored in the normal running position. If
there is insufficient road clearance in this po-

sition, 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.
When the outboard motor is tilted prolonged
time for mooring or trailering the boat, close
the fuel valve.

EMU42591

Storing outboard motor

F115A, FL115A, F115A1, FL115A1

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.

ECM00601

 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 up­right), 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.

 Drain the remaining gasoline from the

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

79

Maintenance

NOTICE

WARNING

TIP:

F150A, FL150A, F150A2, FL150A2, F150B

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.

ECM01351

 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. Do not store or transport
the outboard motor on its side (not up­right).

 Do not place the outboard motor on its

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

 Store the outboard motor in a dry, well-

ventilated place, not in direct sunlight.

 Drain the remaining gasoline from the

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

EMU28306

Procedure

EMU31376

Flushing with a flushing attachment

EWM00323

 Before inspecting, removing, or install-

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

 Do not use your hand to hold the propel-

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

This procedure is performed while the top
cowling and propeller are removed.

1. Disconnect the fuel line from the motor.

2. Install the flushing attachment over the
cooling water inlet. NOTICE: Do not run

the engine without supplying it with
cooling water. Either the engine water
pump will be damaged or the engine
will be damaged from overheating.
Before starting the engine, be sure to
supply water to the cooling water pas­sages. Avoid running the outboard
motor at high speed while on the
flushing attachment, otherwise over­heating could occur.

[ECM02001]

You could be seriously injured if the en­gine accidentally starts when you are near
the propeller.

1. Flushing attachment

80

Maintenance

TIP:

TIP:

TIP:

3. Cooling system flushing is essential to
prevent the cooling system from clog­ging up with salt, sand, or dirt. In addi­tion, fogging/lubricating the engine is
necessary 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]

 When using the flushing attachment, main-

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

 A flushing attachment is available from

your Yamaha dealer.

 If the overheat alert device is activated, turn

the engine off, and consult your Yamaha
dealer.

4. Run the engine at a fast idle for a few
minutes in neutral position. WARNING!

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.

[EWM01473]

NOTICE: Never turn the main switch
to “ ” (start) while the engine is
running. Do not keep the starter motor
turning for more than 5 seconds. If the
starter motor is turned continuously
for more than 5 seconds, the battery
will be quickly discharged, thus mak­ing it impossible to start the engine.
The starter can also be damaged. If

the engine will not start after 5 sec­onds of cranking, return the main
switch to “ ” (on), wait 10 seconds,
then crank the engine again.

[ECM00193]

5. Just prior to turning off the engine, quick­ly spray “Fogging Oil” alternately into the
intake silencer or the fogging hole of the
silencer cover, if equipped. When prop­erly done, the engine will smoke exces­sively and almost stall.

If “Fogging Oil” is not available, turn off the
engine. Remove the spark plug(s). Pour a tea­spoonful of clean engine oil into each cylin­der. Crank the engine several times manually.
Reinstall the spark plug(s).

6. Remove the flushing attachment.

EMU43542

Draining the gasoline from the vapor sep­arator
F115A, FL115A, F115A1, FL115A1

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

F150A, FL150A, F150A2, FL150A2, F150B

This procedure is performed while the top
cowling is removed.
Drain the remaining gasoline in the vapor
separator into a container. Loosen the drain
screw, and then remove the cap. Push in the
air valve with a screwdriver to introduce air
into the float chamber, so that the gasoline
will drain smoothly. Then, tighten the drain
screw.

81

TIP:

NOTICE

1. Drain screw

2

3

1

ZMU07654

1

2

3

ZMU04264

2. Cap

3. Air valve

EMU28403

Lubrication

1. Install the spark plug(s) and torque to
proper specification. For information on
spark plug installation, see page 90.

2. Change the gear oil. For instructions, see
page 97. Inspect the oil for the presence
of water that indicates a leaky seal. Seal
replacement should be performed by an
authorized Yamaha dealer prior to use.

3. Grease all grease fittings. For further de­tails, see page 88.

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

EMU28446

Flushing power unit

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

ECM01531

Maintenance

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

F115A, FL115A, F115A1, FL115A1

1. Fitting

2. Garden hose connector

3. Garden hose adapter

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

82

Maintenance

TIP:

1

ZMU07861

F150A, FL150A, F150A2, FL150A2, F150B

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 cool­ing passages for about 15 minutes. Turn
off the water and disconnect the garden
hose adapter from the garden hose con­nector.

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 cowl­ing fitting or let the hose hang free
during normal operation. Water will
leak out of the connector instead of

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

[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 79.

EMU44341

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.

EMU28462

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. A touch-up paint is
available from your Yamaha dealer.

83

Maintenance

WARNING

EMU2847D

Periodic maintenance

EWM01872

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

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

 The power trim and tilt switches operate

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

 Allow the engine to cool before handling

hot parts or fluids.

 Always completely reassemble the mo-

tor before operation.

EMU28512

Replacement parts

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

EMU34152

Severe operating conditions

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

mum engine speed (rpm) for many hours

 Operating continuously at a low engine

speed (rpm) for many hours

 Operating without sufficient time for engine

to warm up and cool down

 Frequent quick acceleration and decelera-

tion

 Frequent shifting
 Frequently starting and stopping the en-

gine(s)

 Operation that fluctuates often between

light and heavy cargo loads
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.

84

Maintenance

TIP:

EMU34448

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) (cylinder
head, thermostat cov­er)

Anodes (exhaust cov­er, cooling water pas­sage cover, Rectifier
Regulator cover)

Battery (electrolyte lev­el, terminal)

Battery (electrolyte lev­el, terminal)

Cooling water leakage

Cowling lock lever Inspection

Engine starting condi­tion/noise

Engine idle
speed/noise

Engine oil Replacement

Engine oil filter (car­tridge)

Fuel filter (can be dis­assembled)

Inspection or replace­ment as necessary

Inspection or replace­ment as necessary

Replacement

Inspection

Fill, charging or replac­ing as necessary

Inspection or replace­ment as necessary

Inspection

Inspection

Replacement

Inspection or replace­ment as necessary

20 hours

(3 months)

100 hours

(1 year)

300 hours

(3 years)

500 hours

(5 years)

85

Item Actions

Fuel line (High pres­sure)

Fuel line (High pres­sure)

Fuel line (Low pres­sure)

Fuel line (Low pres­sure)

Fuel pump

Fuel/engine oil leakage Inspection

Gear oil Replacement

Greasing points Greasing

Clamp bracket bolt
(through tube)

Impeller/water pump
housing

Impeller/water pump
housing

Power trim and tilt unit Inspection

Propeller/propeller
nut/cotter pin

PCV (Pressure Control
Valve )

Shift link/shift cable

Spark plug(s)

Spark plug caps/spark
plug wires

Water from the cooling
water pilot hole

Throttle link/throttle
cable/throttle pick-up
timing

Thermostat

Timing belt

Valve clearance

Inspection

Inspection or replace­ment as necessary

Inspection

Inspection or replace­ment as necessary

Inspection or replace­ment as necessary

Inspection and greas­ing

Inspection or replace­ment as necessary

Replacement

Inspection or replace­ment as necessary

Inspection or replace­ment as necessary

Inspection, adjust­ment or replacement
as necessary

Inspection or replace­ment as necessary

Inspection or replace­ment as necessary

Inspection

Inspection, adjust­ment or replacement
as necessary

Inspection or replace­ment as necessary

Inspection or replace­ment as necessary

Inspection and adjust­ment

Maintenance

Initial Every

20 hours

(3 months)

100 hours

(1 year)

300 hours

(3 years)

500 hours

(5 years)

86

Maintenance

Item Actions

Cooling water inlet Inspection

Main switch/stop
switch/choke switch

Wire harness connec­tions/wire coupler con­nections

(Yamaha) Meter/gauge Inspection

EMU34452

Maintenance chart 2

Item Actions

Exhaust guide/ex­haust manifold

Timing belt Replacement

Inspection or replace­ment as necessary

Inspection or replace­ment as necessary

Inspection or replace­ment as necessary

Initial Every

20 hours

(3 months)

100 hours

(1 year)

Every

1000 hours

300 hours

(3 years)

500 hours

(5 years)

87

EMU28944

ZMU07479

Greasing

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

F115AET, FL115AET, F115AET1, FL115AET1

Maintenance

88

Maintenance

ZMU01796

F150AET, FL150AET, F150AET2, FL150AET2, F150BET

89

Maintenance

TIP:

WARNING

EMU44491

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 re­move 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.

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:

F115AET LFR6A-11
F115AET1 LFR6A-11
F150AET LFR5A-11
F150AET2 LFR5A-11
F150BET LFR5A-11
FL115AET LFR6A-11
FL115AET1 LFR6A-11
FL150AET LFR5A-11
FL150AET2 LFR5A-11

3. Be sure to use the specified spark plug,

otherwise the engine may not operate
properly. Before fitting the spark plug,

[EWM00562]

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:

1.0–1.1 mm (0.039–0.043 in)

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

Spark plug torque:

25 Nm (2.55 kgf-m, 18.4 ft-lb)

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.

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.

90

Maintenance

NOTICE

WARNING

NOTICE

1

ZMU04271

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 12. If you have difficulty verifying
the idle speed, or the idle speed requires
adjustment, consult a Yamaha dealer or
other qualified mechanic.

EMU42793

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

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

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

[ECM01862]

2. Start the engine. Warm it up and keep
the idle speed for 5-10 minutes.

3. Stop the engine and leave it for 5-10 min­utes.

4. Remove the top cowling.

5. Remove the oil filler cap. Pull out the dip­stick and use the oil changer to extract
the oil completely.

F115A, FL115A, F115A1, FL115A1

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

91

1. Oil filler cap

F150A, FL150A, F150A2, FL150A2, F150B

TIP:

TIP:

1

ZMU06179

ZMU06183

1

2

1

ZMU07954

2

1

ZMU01836

1. Oil filler cap

F115A, FL115A, F115A1, FL115A1

1. Oil changer

F150A, FL150A, F150A2, FL150A2, F150B

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.

F115A, FL115A, F115A1, FL115A1

1. Drain screw

2. Gasket

F150A, FL150A, F150A2, FL150A2, F150B

1. Oil changer

1. Drain screw

2. Gasket

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.

92

Maintenance

TIP:

Drain screw tightening torque:

27 Nm (2.75 kgf-m, 19.9 ft-lb)

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.

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 speci­fied capacity.

[ECM01851]

Recommended engine oil:

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

F115AET 3.5 L (3.70 US qt,

3.08 Imp.qt)
F115AET1 3.5 L (3.70 US qt,

3.08 Imp.qt)
F150AET 4.3 L (4.55 US qt,

3.78 Imp.qt)
F150AET2 4.3 L (4.55 US qt,

3.78 Imp.qt)
F150BET 4.3 L (4.55 US qt,

3.78 Imp.qt)
FL115AET 3.5 L (3.70 US qt,

3.08 Imp.qt)
FL115AET1 3.5 L (3.70 US qt,

3.08 Imp.qt)
FL150AET 4.3 L (4.55 US qt,

3.78 Imp.qt)
FL150AET2 4.3 L (4.55 US qt,

3.78 Imp.qt)
Engine oil quantity (with oil filter re­placement):

F115AET 3.7 L (3.91 US qt,

3.26 Imp.qt)

F115AET1 3.7 L (3.91 US qt,

3.26 Imp.qt)

F150AET 4.5 L (4.76 US qt,

3.96 Imp.qt)

F150AET2 4.5 L (4.76 US qt,

3.96 Imp.qt)

F150BET 4.5 L (4.76 US qt,

3.96 Imp.qt)

FL115AET 3.7 L (3.91 US qt,

3.26 Imp.qt)

FL115AET1 3.7 L (3.91 US qt,

3.26 Imp.qt)

FL150AET 4.5 L (4.76 US qt,

3.96 Imp.qt)

FL150AET2 4.5 L (4.76 US qt,

3.96 Imp.qt)

9. Leave the outboard motor for 5-10 min­utes.

10. Remove oil dipstick and wipe it clean.

93