Yamaha F9.9F User manual

Read this manual carefully before operating this
outboard motor.
OWNER’S MANUAL
F9.9F
FT9.9G
6AU-28199-23-E0
U6AU23E0.book Page 1 Tuesday, February 23, 2010 2:28 PM

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.
U6AU23E0.book Page 1 Tuesday, February 23, 2010 2:28 PM

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 F9.9FMH, FT9.9GE, FT9.9GEP and the
standard accessories are used as a base for
the explanations and illustrations in this man-
ual. Therefore some items may not apply to
every model.
EMU25121
F9.9F, FT9.9G
OWNER’S MANUAL
©2010 by Yamaha Motor Co., Ltd.
1st Edition, February 2010
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan
U6AU23E0.book Page 1 Tuesday, February 23, 2010 2:28 PM

Table of contents
Safety information............................. 1
Outboard motor safety .................... 1
Propeller ............................................. 1
Rotating parts ..................................... 1
Hot parts............................................. 1
Electric shock ..................................... 1
Power tilt............................................. 1
Engine shut-off cord (lanyard) ............ 1
Gasoline ............................................. 1
Gasoline exposure and spills ............. 2
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................................... 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
C-Tick label ..................................... 4
Read manuals and labels................ 6
Warning labels.................................... 6
Specifications and
requirements.................................... 10
Specifications ................................ 10
Installation requirements ............... 11
Boat horsepower rating .................... 11
Mounting motor ................................ 12
Remote control requirements........ 12
Battery requirements..................... 12
Battery specifications ....................... 12
Mounting battery............................... 12
Propeller selection ........................ 12
Start-in-gear protection ................. 13
Engine oil requirements ................ 13
Fuel requirements ......................... 14
Gasoline ........................................... 14
Muddy or acidic water ................... 14
Anti-fouling paint ........................... 14
Motor disposal requirements......... 14
Emergency equipment .................. 14
Components .................................... 15
Components diagram.................... 15
Fuel tank........................................... 16
Fuel joint........................................... 17
Fuel gauge ....................................... 17
Fuel tank cap.................................... 17
Air vent screw................................... 17
Remote control box .......................... 17
Remote control lever ........................ 17
Neutral interlock trigger .................... 17
Neutral throttle lever ......................... 18
Choke switch .................................... 18
Tiller handle ...................................... 18
Gear shift lever ................................. 18
Throttle grip ...................................... 19
Throttle indicator............................... 19
Throttle friction adjuster .................... 19
Engine shut-off cord (lanyard) and
clip................................................. 19
Engine stop button ........................... 20
Choke knob for pull type................... 20
Manual starter handle....................... 20
Main switch....................................... 20
Power tilt switch................................ 21
Steering friction adjuster................... 21
Trim rod (tilt pin) ............................... 22
Tilt lock mechanism .......................... 22
Tilt support knob............................... 22
Tilt support bar ................................. 23
Power tilt unit.................................... 23
Cowling lock lever (pull up type)....... 23
Alert indicator ................................... 24
Instruments and indicators............ 25
Indicators ...................................... 25
Low oil pressure-alert indicator ........ 25
U6AU23E0.book Page 1 Tuesday, February 23, 2010 2:28 PM

Table of contents
Engine control system.................... 26
Alert system .................................. 26
Low oil pressure alert ....................... 26
Installation ....................................... 27
Installation ..................................... 27
Mounting the outboard motor ........... 27
Clamping the outboard motor........... 29
Operation ......................................... 30
First-time operation ....................... 30
Fill engine oil .................................... 30
Breaking in engine............................ 30
Getting to know your boat ................ 30
Checks before starting engine ...... 30
Fuel level .......................................... 30
Remove the top cowling ................... 31
Fuel system ...................................... 31
Controls ............................................ 31
Engine shut-off cord (lanyard) .......... 31
Engine oil.......................................... 32
Engine .............................................. 32
Install top cowling ............................. 32
Checking power tilt system............... 33
Battery .............................................. 33
Filling fuel ...................................... 33
Operating engine........................... 34
Sending fuel (portable tank) ............. 35
Starting engine ................................. 35
Checks after starting engine ......... 40
Cooling water ................................... 40
Warming up engine ....................... 40
Manual start and electric start
models .......................................... 40
Checks after engine warm up ....... 41
Shifting ............................................. 41
Stop switches ................................... 41
Shifting .......................................... 41
Stopping boat ................................ 42
Stopping engine ............................ 43
Procedure......................................... 43
Procedure......................................... 43
Trimming outboard motor.............. 44
Adjusting trim angle for manual tilt
models .......................................... 44
Adjusting trim angle
(power tilt models)......................... 45
Adjusting boat trim............................ 45
Tilting up and down....................... 46
Procedure for tilting up
(manual tilt models)....................... 46
Procedure for tilting up
(power tilt models)......................... 47
Procedure for tilting down
(manual tilt models)....................... 48
Procedure for tilting down
(power tilt models)......................... 48
Shallow water................................ 49
Cruising in shallow water
(manual tilt models)....................... 49
Power tilt models .............................. 50
Cruising in other conditions........... 51
Maintenance .................................... 52
Transporting and storing outboard
motor.......................................... 52
Dismounting the outboard motor ...... 52
Storing outboard motor..................... 54
Procedure......................................... 54
Lubrication........................................ 55
Cleaning the outboard motor............ 55
Checking painted surface of
outboard motor.............................. 56
Periodic maintenance ................... 56
Replacement parts ........................... 56
Severe operating conditions............. 56
Maintenance chart 1......................... 57
Maintenance chart 2......................... 59
Greasing ........................................... 60
Cleaning and adjusting spark plug ... 61
Checking fuel filter ............................ 61
Inspecting idle speed........................ 62
Changing engine oil.......................... 62
Inspecting wiring and connectors ..... 64
Checking propeller ........................... 64
Removing propeller .......................... 65
Installing propeller ............................ 65
Changing gear oil ............................. 67
Cleaning fuel tank............................. 68
Inspecting and replacing anode(s) ... 69
U6AU23E0.book Page 2 Tuesday, February 23, 2010 2:28 PM

Table of contents
Checking battery
(for electric start models) .............. 69
Connecting the battery ..................... 70
Disconnecting the battery................. 70
Trouble Recovery ............................ 71
Troubleshooting ............................ 71
Temporary action in emergency.... 74
Impact damage................................. 74
Replacing fuse.................................. 74
Power tilt will not operate ................. 75
Starter will not operate ..................... 75
Emergency starting engine............... 76
Engine fails to operate .................. 77
Emergency engine operation ........... 77
Treatment of submerged motor..... 77
U6AU23E0.book Page 3 Tuesday, February 23, 2010 2:28 PM

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.
EMU34790
Power 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 tilt mechanism.
The power tilt switches operate even when
the main switch is off. Keep people be away
from the switches whenever working around
the motor.
Never get under the lower unit while it is tilted,
even when the tilt support lever or knob is
locked. Severe injury could occur if the out-
board 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 34 to reduce the
risk of fire and explosion.
U6AU23E0.book Page 1 Tuesday, February 23, 2010 2:28 PM

Safety information
2
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.
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.
U6AU23E0.book Page 2 Tuesday, February 23, 2010 2:28 PM

Safety information
3
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.
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
U6AU23E0.book Page 3 Tuesday, February 23, 2010 2:28 PM

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. EMU25190
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. Outboard motor serial number location
1. Outboard motor serial number location
1
ZMU05335
1
ZMU05336
1. Key number
U6AU23E0.book Page 4 Tuesday, February 23, 2010 2:28 PM

General information
5
1. C-Tick label location
ZMU01697
U6AU23E0.book Page 5 Tuesday, February 23, 2010 2:28 PM

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.
F9.9FMH
U6AU23E0.book Page 6 Tuesday, February 23, 2010 2:28 PM

General information
7
FT9.9GE, FT9.9GEP
U6AU23E0.book Page 7 Tuesday, February 23, 2010 2:28 PM

General information
8
EMU33912
Contents of labels
The above warning labels mean as follows.
1
WARNING
EWM01691
Emergency starting does not have start-
in-gear protection. Ensure shift control is
in neutral before starting engine.
2
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.
3
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.
12
3
ZMU05670
U6AU23E0.book Page 8 Tuesday, February 23, 2010 2:28 PM

General information
9
EMU33843
Symbols
The following symbols mean as follows.
Notice/Warning
Read Owner’s Manual
Hazard caused by continuous rotation
Electrical hazard
Remote control lever/gear shift lever operat-
ing direction, dual direction
Engine start/ Engine cranking
ZMU05696
ZMU05664
ZMU05665
ZMU05666
ZMU05667
ZMU05668
U6AU23E0.book Page 9 Tuesday, February 23, 2010 2:28 PM

Specifications and requirements
10
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 13.
EMU2821J
Dimension:
Overall length:
F9.9FMH 927 mm (36.5 in)
FT9.9GE 552 mm (21.7 in)
FT9.9GEP 552 mm (21.7 in)
Overall width:
F9.9FMH 375 mm (14.8 in)
FT9.9GE 331 mm (13.0 in)
FT9.9GEP 331 mm (13.0 in)
Overall height S:
F9.9FMH 1000 mm (39.4 in)
Overall height L:
F9.9FMH 1127 mm (44.4 in)
FT9.9GE 1187 mm (46.7 in)
FT9.9GEP 1187 mm (46.7 in)
Overall height X:
FT9.9GE 1255 mm (49.4 in)
Transom height S:
F9.9FMH 435 mm (17.1 in)
Transom height L:
557 mm (21.9 in)
Transom height X:
FT9.9GE 625 mm (24.6 in)
Weight (AL) S:
F9.9FMH 40.0 kg (88 lb)
Weight (AL) L:
F9.9FMH 41.0 kg (90 lb)
FT9.9GE 44.0 kg (97 lb)
FT9.9GEP 49.0 kg (108 lb)
Weight (AL) X:
FT9.9GE 45.0 kg (99 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Maximum output:
7.3 kW@5500 r/min (9.9 HP@5500
r/min)
Idle speed (in neutral):
1050 ±50 r/min
Engine:
Type:
4-stroke L
Displacement:
212.0 cm³
Bore ×stroke:
56.0 ×43.0 mm (2.20 ×1.69 in)
Ignition system:
CDI
Spark plug (NGK):
BR6HS-10
Spark plug gap:
0.9–1.0 mm (0.035–0.039 in)
Control system:
F9.9FMH Tiller handle
FT9.9GE Remote control
FT9.9GEP Remote control
Starting system:
F9.9FMH Manual starter
FT9.9GE Electric starter
FT9.9GEP Electric starter
Starting carburetion system:
Choke valve
Valve clearance (cold engine) IN:
0.15–0.20 mm (0.0059–0.0079 in)
Valve clearance (cold engine) EX:
0.20–0.25 mm (0.0079–0.0098 in)
U6AU23E0.book Page 10 Tuesday, February 23, 2010 2:28 PM

Specifications and requirements
11
Min. cold cranking amps (CCA/EN):
FT9.9GE 347.0 A
FT9.9GEP 347.0 A
Min. rated capacity (20HR/IEC):
FT9.9GE 40.0 Ah
FT9.9GEP 40.0 Ah
Alternator output:
F9.9FMH 80 W
Maximum generator output:
FT9.9GE 6 A
FT9.9GEP 6 A
Drive unit:
Gear positions:
Forward-neutral-reverse
Gear ratio:
F9.9FMH 2.08(27/13)
FT9.9GE 2.92(38/13)
FT9.9GEP 2.92(38/13)
Trim and tilt system:
F9.9FMH Manual tilt
FT9.9GE Manual tilt
FT9.9GEP Power tilt
Propeller mark:
F9.9FMH N
FT9.9GE R
FT9.9GEP R
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Fuel tank capacity:
12.0 L (3.17 US gal, 2.64 Imp.gal)
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
Engine oil quantity:
0.8 L (0.85 US qt, 0.70 Imp.qt)
Lubrication:
Wet sump
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
F9.9FMH 0.150 L (0.159 US qt,
0.132 Imp.qt)
FT9.9GE 0.370 L (0.391 US qt,
0.326 Imp.qt)
FT9.9GEP 0.370 L (0.391 US qt,
0.326 Imp.qt)
Tightening torque for engine:
Spark plug:
25.0 Nm (2.55 kgf-m, 18.4 ft-lb)
Propeller nut:
F9.9FMH 17.0 Nm (1.73 kgf-m,
12.5 ft-lb)
FT9.9GE 21.0 Nm (2.14 kgf-m,
15.5 ft-lb)
FT9.9GEP 21.0 Nm (2.14 kgf-m,
15.5 ft-lb)
Engine oil drain bolt:
24.0 Nm (2.45 kgf-m, 17.7 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.
U6AU23E0.book Page 11 Tuesday, February 23, 2010 2:28 PM

Specifications and requirements
12
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
27.
EMU33581
Remote control requirements
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.
The remote control unit must be equipped
with a start-in-gear protection device(s). This
device prevents the engine from starting un-
less it is in neutral.
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]
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-
Minimum cold cranking amps (CCA/EN):
FT9.9GE 347.0 A
FT9.9GEP 347.0 A
Minimum rated capacity (20HR/IEC):
FT9.9GE 40.0 Ah
FT9.9GEP 40.0 Ah
U6AU23E0.book Page 12 Tuesday, February 23, 2010 2:28 PM

Specifications and requirements
13
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 64.
EMU25760
Start-in-gear protection
Yamaha outboard motors affixed with the pic-
tured label or Yamaha-approved remote con-
trol 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 en-
gine.
EMU35096
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)
ZMU04604
-
x
123
1. Start-in-gear protection label
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
Engine oil quantity:
0.8 L (0.85 US qt, 0.70 Imp.qt)
ZMU01713
1
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Specifications and requirements
14
EMU36360
Fuel requirements
EMU36771
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. 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:
Regular unleaded gasoline
U6AU23E0.book Page 14 Tuesday, February 23, 2010 2:28 PM