Yamaha F250B User manual

Read this manual carefully before operating this
outboard motor.
OWNER’S MANUAL
F250B
FL250B
6BR-28199-23-E0
U6BR23E0.book Page 1 Friday, March 26, 2010 9:18 AM

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.
U6BR23E0.book Page 1 Friday, March 26, 2010 9:18 AM

Important manual information
EMU25107
To the owner
Thank you for selecting a Yamaha outboard
motor. This Owner’s Manual contains infor-
mation needed for proper operation, mainte-
nance 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 haz-
ards. Obey all safety messages that follow
this symbol to avoid possible injury or death.
WARNING
EWM00781
A WARNING indicates a hazardous situa-
tion which, if not avoided, could result in
death or serious injury.
NOTICE
ECM00701
A NOTICE indicates special precautions
that must be taken to avoid damage to the
outboard motor or other property.
T
IP:
A TIP provides key information to make pro-
cedures easier or clearer.
Yamaha continually seeks advancements in
product design and quality. Therefore, while
this manual contains the most current product
information available at the time of printing,
there may be minor discrepancies between
your machine and this manual. If there is any
question concerning this manual, please con-
sult your Yamaha dealer.
To ensure long product life, Yamaha recom-
mends that you use the product and perform
the specified periodic inspections and mainte-
nance by correctly following the instructions in
the owner’s manual. Any damage resulting
from neglect of these instructions is not cov-
ered by warranty.
Some countries have laws or regulations re-
stricting 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 war-
ranty may not apply in certain regions. When
planning to take the product to another coun-
try, consult the dealer where the product was
purchased for further information.
If the product was purchased used, please
consult your closest dealer for customer re-
registration, and to be eligible for the specified
services.
T
IP:
The F250BET, FL250BET and the standard
accessories are used as a base for the expla-
nations and illustrations in this manual. There-
fore some items may not apply to every
model.
EMU25121
F250B, FL250B
OWNER’S MANUAL
©2010 by Yamaha Motor Co., Ltd.
1st Edition, March 2010
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan
U6BR23E0.book Page 1 Friday, March 26, 2010 9:18 AM

Table of contents
Safety information............................. 1
Outboard motor safety .................... 1
Propeller ............................................. 1
Rotating parts ..................................... 1
Hot parts............................................. 1
Electric shock ..................................... 1
Power trim and tilt............................... 1
Engine shut-off cord (lanyard) ............ 1
Gasoline ............................................. 1
Gasoline exposure and spills ............. 1
Carbon monoxide ............................... 2
Modifications ...................................... 2
Boating safety ................................. 2
Alcohol and drugs............................... 2
Personal flotation devices .................. 2
People in the water............................. 2
Passengers ........................................ 2
Overloading ........................................ 2
Avoid collisions................................... 2
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
Digital electronic control serial
number............................................ 4
Key number........................................ 5
C-Tick label ..................................... 5
Read manuals and labels................ 6
Warning labels.................................... 6
Specifications and requirements..... 9
Specifications .................................. 9
Installation requirements ............... 10
Boat horsepower rating .................... 10
Mounting motor ................................ 10
Digital electronic control
requirements .............................. 10
Battery requirements..................... 11
Battery specifications ....................... 11
Mounting battery............................... 11
Multiple batteries .............................. 11
Propeller selection ........................ 11
Counter rotation models ................... 12
Start-in-gear protection ................. 12
Engine oil requirements ................ 12
Fuel requirements ......................... 13
Gasoline ........................................... 13
Muddy or acidic water ................... 13
Anti-fouling paint ........................... 13
Motor disposal requirements......... 13
Emergency equipment .................. 13
Emission control information......... 14
U.S. insular areas............................. 14
Components .................................... 15
Components diagram.................... 15
Digital electronic control ................... 17
Digital electronic control-active
indicator ........................................ 18
Digital electronic control-alert
indicator ........................................ 19
Control lever ..................................... 20
Neutral interlock trigger .................... 20
Free throttle switch ........................... 21
Throttle friction adjuster .................... 22
Engine selector switch...................... 23
Engine shut-off cord (lanyard) and
clip................................................. 23
Main switch....................................... 24
Power trim and tilt switch on digital
electronic control........................... 25
Power trim and tilt switch on bottom
cowling .......................................... 26
Power trim and tilt switches.............. 26
Trim tab with anode.......................... 27
Tilt support lever for power trim and
tilt model........................................ 28
Cowling lock lever (pull up type)....... 28
Flushing device ................................ 28
Fuel filter/Water separator................ 29
Instruments and indicators............ 30
6Y8 Multifunction meters .............. 30
6Y8 Multifunction tachometers...... 30
Start-up checks ................................ 30
Adjusting trolling speed .................... 31
Low oil pressure-alert ....................... 31
U6BR23E0.book Page 1 Friday, March 26, 2010 9:18 AM

Table of contents
Overheat alert................................... 31
Water separator alert........................ 32
Engine trouble alert .......................... 32
Low battery voltage-alert .................. 32
6Y8 Multifunction speed & fuel
meters ........................................ 32
6Y8 Multifunction speedometers... 33
6Y8 Multifunction fuel
management meters .................. 34
Engine control system.................... 35
Alert system .................................. 35
Digital Electronic Control alert .......... 35
Overheat alert................................... 35
Low oil pressure alert ....................... 36
Installation ....................................... 38
Installation ..................................... 38
Mounting the outboard motor ........... 38
Operation ......................................... 40
First-time operation ....................... 40
Fill engine oil .................................... 40
Breaking in engine............................ 40
Getting to know your boat ................ 40
Checks before starting engine ...... 40
Fuel level .......................................... 40
Remove cowling ............................... 41
Fuel system ...................................... 41
Controls ............................................ 41
Engine shut-off cord (lanyard) .......... 42
Engine oil.......................................... 42
Engine .............................................. 43
Flushing device ................................ 43
Install cowling ................................... 43
Checking power trim and tilt
system........................................... 44
Battery .............................................. 45
Filling fuel ...................................... 45
Operating engine........................... 46
Sending fuel ..................................... 46
Starting engine ................................. 46
Checks after starting engine ......... 49
Cooling water ................................... 49
Warming up engine ....................... 49
Electric start models ......................... 49
Checks after engine warm up ....... 49
Shifting ............................................. 49
Stop switches ................................... 49
Selecting outboard motor
(triple engine)............................. 49
Shifting .......................................... 51
Stopping boat................................ 53
Operating the port / center /
starboard engine........................ 53
Boat direction ................................ 56
Stopping engine ............................ 58
Procedure for stopping engine ......... 58
Trimming outboard motor.............. 59
Adjusting trim angle
(Power trim and tilt)....................... 59
Adjusting boat trim............................ 60
Tilting up and down....................... 61
Procedure for tilting up
(power trim and tilt models)........... 62
Procedure for tilting down
(power trim and tilt models)........... 64
Shallow water................................ 64
Power trim and tilt models ................ 64
Cruising in other conditions........... 66
Maintenance .................................... 67
Transporting and storing outboard
motor.......................................... 67
Storing outboard motor..................... 67
Procedure......................................... 68
Lubrication........................................ 68
Flushing power unit .......................... 69
Checking painted surface of
outboard motor.............................. 69
Periodic maintenance ................... 70
Replacement parts ........................... 70
Severe operating conditions............. 70
Maintenance chart 1......................... 71
Maintenance chart 2......................... 73
Greasing ........................................... 74
Cleaning and adjusting spark plug ... 75
Inspecting idling speed..................... 76
Changing engine oil.......................... 76
Inspecting wiring and connectors ..... 78
U6BR23E0.book Page 2 Friday, March 26, 2010 9:18 AM

Table of contents
Checking propeller ........................... 78
Removing propeller .......................... 79
Installing propeller ............................ 79
Changing gear oil ............................. 80
Inspecting and replacing anode(s) ... 82
Checking battery
(for electric start models) .............. 82
Connecting the battery ..................... 83
Disconnecting the battery................. 85
Trouble Recovery ............................ 86
Troubleshooting ............................ 86
Temporary action in emergency.... 89
Impact damage................................. 89
Running in an emergency
(twin engines or triple engines) ..... 89
Replacing fuse.................................. 89
Power trim and tilt will not operate ... 90
Water separator-alert indicator
blinks while cruising ...................... 90
Treatment of submerged motor..... 92
U6BR23E0.book Page 3 Friday, March 26, 2010 9:18 AM

1
Safety information
EMU33622
Outboard motor safety
Observe these precautions at all times.
EMU36501
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 neu-
tral, and sharp edges of the propeller can cut
even when stationary.
●Stop the engine when a person is in the wa-
ter near you.
●Keep people out of reach of the propeller,
even when the engine is off.
EMU33630
Rotating parts
Hands, feet, hair, jewelry, clothing, PFD
straps, etc. can become entangled with inter-
nal rotating parts of the engine, resulting in se-
rious injury or death.
Keep the top cowling in place whenever pos-
sible. Do not remove or replace the cowling
with the engine running.
Only operate the engine with the cowling re-
moved according to the specific instructions in
the manual. Keep hands, feet, hair, jewelry,
clothing, PFD straps, etc. away from any ex-
posed moving parts.
EMU33640
Hot parts
During and after operation, engine parts are
hot enough to cause burns. Avoid touching
any parts under the top cowling until the en-
gine has cooled.
EMU33650
Electric shock
Do not touch any electrical parts while starting
or operating the engine. They can cause
shock or electrocution.
EMU33660
Power trim and tilt
Body parts can be crushed between the mo-
tor and the clamp bracket when the motor is
trimmed or tilted. Keep body parts out of this
area at all times. Be sure no one is in this area
before operating the power trim and tilt mech-
anism.
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. Se-
vere injury could occur if the outboard motor
accidentally falls.
EMU33671
Engine shut-off cord (lanyard)
Attach the engine shut-off cord so that the en-
gine stops if the operator falls overboard or
leaves the helm. This prevents the boat from
running away under power and leaving peo-
ple stranded, or running over people or ob-
jects.
Always attach the engine shut-off cord to a
secure place on your clothing or your arm or
leg while operating. Do not remove it to leave
the helm while the boat is moving. Do not at-
tach the cord to clothing that could tear loose,
or route the cord where it could become en-
tangled, 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 ob-
jects forward.
EMU33810
Gasoline
Gasoline and its vapors are highly flam-
mable and explosive. Always, refuel accord-
ing to the procedure on page 46 to reduce the
risk of fire and explosion.
EMU33820
Gasoline exposure and spills
Take care not to spill gasoline. If gasoline
spills, wipe it up immediately with dry rags.
Dispose of rags properly.
U6BR23E0.book Page 1 Friday, March 26, 2010 9:18 AM

Safety information
2
If any gasoline spills onto your skin, immedi-
ately wash with soap and water. Change
clothing if gasoline spills on it.
If you swallow gasoline, inhale a lot of gaso-
line vapor, or get gasoline in your eyes, get
immediate medical attention. Never siphon
fuel by mouth.
EMU33900
Carbon monoxide
This product emits exhaust gases which con-
tain 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 ex-
haust outlets.
EMU33780
Modifications
Do not attempt to modify this outboard motor.
Modifications to your outboard motor may re-
duce safety and reliability, and render the out-
board unsafe or illegal to use.
EMU33740
Boating safety
This section includes a few of the many im-
portant safety precautions that you should fol-
low when boating.
EMU33710
Alcohol and drugs
Never operate after drinking alcohol or taking
drugs. Intoxication is one of the most common
factors contributing to boating fatalities.
EMU33720
Personal flotation devices
Have an approved personal flotation device
(PFD) on board for every occupant. Yamaha
recommends that you must wear a PFD
whenever boating. At a minimum, children
and non-swimmers should always wear
PFDs, and everyone should wear PFDs when
there are potentially hazardous boating condi-
tions.
EMU33731
People in the water
Always watch carefully for people in the wa-
ter, such as swimmers, skiers, or divers,
whenever the engine is running. When some-
one 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.
EMU33751
Passengers
Consult your boat manufacturer’s instructions
for details about appropriate passenger loca-
tions 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 loca-
tions may result in being thrown either over-
board 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.
EMU33760
Overloading
Do not overload the boat. Consult the boat ca-
pacity plate or boat manufacturer for maxi-
mum weight and number of passengers. Be
sure that weight is properly distributed ac-
cording to the boat manufacturers instruc-
tions. Overloading or incorrect weight
distribution can compromise the boats han-
dling and lead to an accident, capsizing or
swamping.
EMU33772
Avoid collisions
Scan constantly for people, objects, and other
boats. Be alert for conditions that limit your
visibility or block your vision of others.
U6BR23E0.book Page 2 Friday, March 26, 2010 9:18 AM

Safety information
3
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 un-
derstand where you are going.
●Avoid areas with submerged objects or
shallow water.
●Ride within your limits and avoid aggressive
maneuvers to reduce the risk of loss of con-
trol, 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 anoth-
er direction.
EMU33790
Weather
Stay informed about the weather. Check
weather forecasts before boating. Avoid boat-
ing in hazardous weather.
EMU33880
Passenger training
Make sure at least one other passenger is
trained to operate the boat in the event of an
emergency.
EMU33890
Boating safety publications
Be informed about boating safety. Additional
publications and information can be obtained
from many boating organizations.
EMU33600
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.
ZMU06025
U6BR23E0.book Page 3 Friday, March 26, 2010 9:18 AM

General information
4
EMU25171
Identification numbers record
EMU25183
Outboard motor serial number
The outboard motor serial number is stamped
on the label attached to the port side of the
clamp bracket.
Record your outboard motor serial number in
the spaces provided to assist you in ordering
spare parts from your Yamaha dealer or for
reference in case your outboard motor is sto-
len.
EMU34943
Digital electronic control serial num-
ber
The digital electronic control serial number is
stamped on the label attached to the digital
electronic control box.
Record your digital electronic control serial
number in the spaces provided to assist you
in newly connecting the digital electronic con-
trol to the outboard motor.
T
IP:
Consult your Yamaha dealer if you have any
questions concerning the digital electronic
control serial number.
1. Outboard motor serial number location
1. Digital electronic control serial number loca-
tion
1. Digital electronic control serial number loca-
tion
1. Digital electronic control serial number loca-
tion
ZMU06224
1
ZMU05885
1
ZMU05887
1
U6BR23E0.book Page 4 Friday, March 26, 2010 9:18 AM

General information
5
EMU25191
Key number
If a main key switch is equipped with the mo-
tor, the key identification number is stamped
on your key as shown in the illustration.
Record this number in the space provided for
reference in case you need a new key.
EMU25213
C-Tick label
Engines affixed with this label conform to cer-
tain portion(s) of the Australian Radio Com-
munications Act.
1. Digital electronic control serial number loca-
tion
ZMU05958
1
1. Key number
1. C-Tick label location
ZMU01697
U6BR23E0.book Page 5 Friday, March 26, 2010 9:18 AM

General information
6
EMU33522
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.
EMU33832
Warning labels
If these labels are damaged or missing, contact your Yamaha dealer for replacements.
F250B, FL250B
U6BR23E0.book Page 6 Friday, March 26, 2010 9:18 AM

General information
7
EMU34651
Contents of labels
The above warning labels mean as follows.
1
WARNING
EWM01681
●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
WARNING
EWM01671
●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.
EMU33850
Other labels
12
ZMU06191
3
ZMU05710
U6BR23E0.book Page 7 Friday, March 26, 2010 9:18 AM

General information
8
EMU35132
Symbols
The following symbols mean as follows.
Notice/Warning
Read Owner’s Manual
Hazard caused by continuous rotation
Electrical hazard
ZMU05696
ZMU05664
ZMU05665
ZMU05666
U6BR23E0.book Page 8 Friday, March 26, 2010 9:18 AM

Specifications and requirements
9
EMU34520
Specifications
T
IP:
“(AL)”stated in the specification data below
represents the numerical value for the alumi-
num propeller installed.
Likewise, “(SUS)”represents the value for
stainless steel propeller installed and “(PL)”
for plastic propeller installed.
T
IP:
“*”means, select the engine oil referring to the
chart of engine oil paragraph. For further infor-
mation, see page 12.
EMU2821J
Dimension:
Overall length:
868 mm (34.2 in)
Overall width:
634 mm (25.0 in)
Overall height X:
1829 mm (72.0 in)
Overall height U:
1956 mm (77.0 in)
Transom height X:
643 mm (25.3 in)
Transom height U:
770 mm (30.3 in)
Weight (SUS) X:
F250BET 276.0 kg (608 lb)
FL250BET 280.0 kg (617 lb)
Weight (SUS) U:
286.0 kg (631 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Maximum output:
183.9 kW@5500 r/min (250 HP@5500
r/min)
Idle speed (in neutral):
650 ±50 r/min
Engine:
Type:
4-stroke V
Displacement:
3352.0 cm³
Bore ×stroke:
94.0 ×80.5 mm (3.70 ×3.17 in)
Ignition system:
TCI
Spark plug (NGK):
LFR6A-11
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
Control system:
Remote control
Starting system:
Electric starter
Starting carburetion system:
Electronic fuel injection
Valve clearance (cold engine) IN:
0.17–0.23 mm (0.0067–0.0091 in)
Valve clearance (cold engine) EX:
0.31–0.37 mm (0.0122–0.0146 in)
Min. cold cranking amps (CCA/EN):
711.0 A
Min. rated capacity (20HR/IEC):
100.0 Ah
Maximum generator output:
44 A
Drive unit:
Gear positions:
Forward-neutral-reverse
Gear ratio:
2.00(30/15)
Trim and tilt system:
Power trim and tilt
Propeller mark:
F250BET T / M
FL250BET TL / ML
U6BR23E0.book Page 9 Friday, March 26, 2010 9:18 AM

Specifications and requirements
10
Fuel and oil:
Recommended fuel:
Premium unleaded gasoline
Min. research octane:
94
Recommended engine oil:
4-stroke outboard motor oil
Recommended engine oil group 1*:
SAE 10W-30/10W-40/5W-30
API SE/SF/SG/SH/SJ/SL
Recommended engine oil group 2*:
SAE 15W-40/20W-40/20W-50
API SH/SJ/SL
Total engine oil quantity (oil pan capacity):
5.6 L (5.92 US qt, 4.93 Imp.qt)
Lubrication:
Wet sump
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
F250BET 0.918 L (0.970 US qt,
0.808 Imp.qt)
FL250BET 0.803 L (0.849 US qt,
0.707 Imp.qt)
Tightening torque for engine:
Spark plug:
25.0 Nm (2.55 kgf-m, 18.4 ft-lb)
Propeller nut:
55.0 Nm (5.61 kgf-m, 40.6 ft-lb)
Engine oil drain bolt:
28.0 Nm (2.86 kgf-m, 20.7 ft-lb)
Engine oil filter:
18.0 Nm (1.84 kgf-m, 13.3 ft-lb)
EMU33554
Installation requirements
EMU33564
Boat horsepower rating
WARNING
EWM01560
Overpowering a boat can cause severe in-
stability.
Before installing the outboard motor(s), con-
firm that the total horsepower of your out-
board motor(s) does not exceed the boats
maximum horsepower rating. See the boat’s
capacity plate or contact the manufacturer.
EMU33571
Mounting motor
WARNING
EWM01570
●Improper mounting of the outboard mo-
tor could result in hazardous conditions
such as poor handling, loss of control,
or fire hazards.
●Because the motor is very heavy, spe-
cial equipment and training is required
to mount it safely.
Your dealer or other person experienced in
proper rigging should mount the motor using
correct equipment and complete rigging in-
structions. For further information, see page
38.
EMU34952
Digital electronic control re-
quirements
The digital electronic control be equipped with
a start-in-gear protection device(s). This de-
vice prevents the engine from starting unless
it is in neutral.
WARNING
EWM01580
●If the engine starts in gear, the boat can
move suddenly and unexpectedly, pos-
sibly causing a collision or throwing
passengers overboard.
●If the engine ever starts in gear, the
start-in-gear protection device is not
working correctly and you should dis-
continue using the outboard. Contact
your Yamaha dealer.
U6BR23E0.book Page 10 Friday, March 26, 2010 9:18 AM

Specifications and requirements
11
This digital electronic control unit is only avail-
able for the outboard motor which you have
purchased.
Prior to use of the digital electronic control
unit, set it in order to operate your outboard
motor only. Otherwise, it will not be possible to
operate the outboard motor.
Perform setting of the outboard motor and the
digital electronic control unit in the following
cases.
●If a used outboard motor is installed
●If the digital electronic control unit is re-
placed
●If the ECM (Electronic control module) of
the used outboard motor is replaced
●If the ECM (Electronic control module) of
the digital electronic control unit is replaced
Consult your Yamaha dealer for setting.
EMU25694
Battery requirements
EMU25721
Battery specifications
The engine cannot be started if battery volt-
age is too low.
EMU36290
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.
[EWM01820]
EMU36300
Multiple batteries
To connect multiple batteries, such as for mul-
tiple engine configurations or for an accessory
battery, consult your Yamaha dealer about
battery selection and correct wiring.
EMU34194
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 ev-
ery Yamaha outboard motor and every appli-
cation.
Your outboard motor came with a Yamaha
propeller selected to perform well over a
range of applications, but there may be uses
where a different propeller would be more ap-
propriate.
Your Yamaha dealer can help you select the
right propeller for your boating needs. Select
a propeller that will allow the engine to reach
the middle or upper half of the operating
range at full throttle with the maximum boat-
load. Generally, select a larger pitch propeller
for a smaller operating load and a smaller
pitch propeller for a heavier load. If you carry
loads that vary widely, select the propeller that
lets the engine run in the proper range for your
maximum load but remember that you may
need to reduce your throttle setting to stay
within the recommended engine speed range
when carrying lighter loads.
To check the propeller, see page 78.
Minimum cold cranking amps (CCA/EN):
711.0 A
Minimum rated capacity (20HR/IEC):
100.0 Ah
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Specifications and requirements
12
EMU36310
Counter rotation models
Standard outboard motors rotate clockwise.
Counter rotation models rotate counterclock-
wise. Counter rotation models are typically
used in multiple motor setups and are marked
with an “L”on the gear case above the anti-
ventilation plate.
On counter rotation models, be sure to use a
propeller intended for counterclockwise rota-
tion. These propellers are identified with the
letter “L”after the size indication on the pro-
peller. WARNING! Never use a standard
propeller with a counter rotation motor, or
a counter rotation propeller with a stan-
dard 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. [EWM01810]
For instructions on propeller removal and in-
stallation, see page 79 and 79.
EMU35140
Start-in-gear protection
Yamaha outboard motors or Yamaha-ap-
proved digital electronic control units are
equipped with start-in-gear protection de-
vice(s). This feature permits the engine to be
started only when it is in neutral. Always se-
lect neutral before starting the engine.
EMU37475
Engine oil requirements
If the recommended engine oil grades are not
available, select an alternative from the fol-
lowing chart according to the average temper-
atures in your area.
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
ZMU04607
-
x
123
Recommended engine oil:
4-stroke motor oil with a combination
of the following SAE and API oil clas-
sifications
Engine oil type SAE:
10W-30 or 10W-40
Engine oil grade API:
SE, SF, SG, SH, SJ, SL
Total engine oil quantity (oil pan capaci-
ty):
5.6 L (5.92 US qt, 4.93 Imp.qt)
Replacement engine oil quantity (at peri-
odic maintenance):
Without oil filter replacement:
4.5 L (4.76 US qt, 3.96 Imp.qt)
With oil filter replacement:
4.7 L (4.97 US qt, 4.14 Imp.qt)
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Specifications and requirements
13
EMU36360
Fuel requirements
EMU36853
Gasoline
Use a good quality gasoline that meets the
minimum octane rating. Yamaha recomends
that you use alcohol-free (see Gasohol) gas-
oline whenever possible.
NOTICE
ECM01981
●Do not use leaded gasoline. Leaded gas-
oline can seriously damage the engine.
●Avoid getting water and contaminants in
the fuel tank. Contaminated fuel can
cause poor performance or engine dam-
age. Use only fresh gasoline that has
been stored in clean containers.
Gasohol
There are two types of gasohol: gasohol con-
taining ethanol (E10) and that containing
methanol. Ethanol can be used if the ethanol
content does not exceed 10% and the fuel
meets the minimum octane ratings. All etha-
nol blends containing more than 10% ethanol
can cause fuel system damage or cause en-
gine starting and running problems. Yamaha
does not recommend gasohol containing
methanol because it can cause fuel system
damage or engine performance problems.
EMU36880
Muddy or acidic water
Yamaha strongly recommends that you have
your dealer install the optional chromium-plat-
ed water pump kit if you use the outboard mo-
tor in muddy or acidic water conditions.
However, depending on the model it might not
be required.
EMU36330
Anti-fouling paint
A clean hull improves boat performance. The
boat bottom should be kept as clean of marine
growth as possible. If necessary, the boat bot-
tom 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.
EMU36341
Motor disposal requirements
Never illegally discard (dump) the motor.
Yamaha recommends consulting the dealer
about discarding the motor.
EMU36352
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.
Recommended gasoline:
Premium unleaded gasoline with a
minimum octane rating of 94 (Re-
search Octane Number).
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Specifications and requirements
14
EMU25221
Emission control information
EMU25310
U.S. insular areas
Engines affixed with the label pictured below
conform to U.S. Environmental Protection
Agency (EPA) regulations for marine SI en-
gines. See the label affixed to your engine for
details.
EMU31570
Approval label of emission control certifi-
cate
This label is attached to the bottom cowling.
New Technology; (4-stroke) MFI
EMU25332
Manufactured date label
This label is attached to the clamp bracket or
the swivel bracket.
1. Approval label location
ZMU06894
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 NETRAL
SPARK PLUG GAP (mm):
VALVE LASH (mm) IN: EX:
YAMAHA MOTOR CO.,LTD.
1. Manufactured date label location
Manufactured:
ZMU04346
U6BR23E0.book Page 14 Friday, March 26, 2010 9:18 AM