Yamaha F8C User manual

Read this manual carefully before operating this
outboard motor.
OWNER’S MANUAL
F8C
FT8D
60R-F8199-79-E0
U60R79E0.book Page 1 Wednesday, December 18, 2013 1:32 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.
U60R79E0.book Page 1 Wednesday, December 18, 2013 1:32 PM

Important manual information
EMU25108
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
EWM00782
A WARNING indicates a hazardous situa-
tion which, if not avoided, could result in
death or serious injury.
NOTICE
ECM00702
A NOTICE indicates special precautions
that must be taken to avoid damage to the
outboard motor or other property.
TIP:
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 prod-
uct information available at the time of print-
ing, there may be minor discrepancies
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 recom-
mends that you use the product and perform
the specified periodic inspections and main-
tenance by correctly following the instruc-
tions in the owner’s manual. Any damage
resulting from neglect of these instructions is
not covered 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 speci-
fied services.
TIP:
The F8CMH, FT8DMH, FT8DE, FT8DEP 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.
EMU25142
F8C, FT8D
OWNER’S MANUAL
©2013 by Yamaha Motor Co., Ltd.
1st Edition, November 2013
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in France
U60R79E0.book Page 1 Wednesday, December 18, 2013 1:32 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 (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 .................................... 5
Read manuals and labels................ 6
Warning labels ................................... 6
Specifications and requirements... 10
Specifications................................ 10
Installation requirements............... 12
Boat horsepower rating.................... 12
Mounting outboard 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
Anti-fouling paint .......................... 14
Outboard motor disposal
requirements.............................. 14
Emergency equipment.................. 14
Components.................................... 16
Components diagram ................... 16
Fuel tank........................................... 17
Fuel joint........................................... 18
Fuel gauge........................................ 18
Fuel tank cap.................................... 18
Air vent screw................................... 18
Remote control box.......................... 18
Remote control lever ........................ 18
Neutral interlock trigger.................... 19
Neutral throttle lever......................... 19
Choke switch.................................... 19
Tiller handle ..................................... 19
Gear shift lever ................................ 19
Throttle grip ..................................... 20
Throttle indicator ............................. 20
Throttle friction adjuster ................... 20
Engine shut-off cord (lanyard) and
clip ................................................ 21
Engine stop button .......................... 22
Choke knob for pull type.................. 22
Manual starter handle....................... 22
Main switch ...................................... 22
Power tilt switch ............................... 23
Steering friction adjuster .................. 23
Trim rod (tilt pin) ............................... 23
Tilt lock mechanism ......................... 23
Tilt support knob .............................. 24
Tilt support bar ................................. 24
Power tilt unit ................................... 24
Cowling lock lever (pull up type) ...... 25
Flushing device ................................ 25
Alert indicator .................................. 25
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Table of contents
Instruments and indicators ............ 26
Indicators ..................................... 26
Low oil pressure-alert indicator........ 26
Engine control system .................... 27
Alert system .................................. 27
Low oil pressure alert....................... 27
Installation ....................................... 28
Installation ..................................... 28
Mounting the outboard motor.......... 28
Clamping the outboard motor.......... 29
Operation ......................................... 31
First-time operation....................... 31
Fill engine oil .................................... 31
Breaking in engine............................ 31
Getting to know your boat ............... 31
Checks before starting engine ...... 31
Fuel level .......................................... 32
Remove the top cowling .................. 32
Fuel system ...................................... 32
Controls............................................ 32
Engine shut-off cord (lanyard).......... 32
Engine oil.......................................... 33
Engine .............................................. 33
Flushing device ................................ 33
Install top cowling ............................ 34
Checking power tilt system.............. 34
Battery.............................................. 34
Filling fuel ..................................... 35
Operating engine........................... 36
Sending fuel (portable tank) ............. 36
Starting engine ................................. 37
Checks after starting engine ......... 40
Cooling water ................................... 40
Warming up engine ....................... 41
Manual start and electric start
models .......................................... 41
Checks after engine warm up ....... 41
Shifting ............................................. 41
Stop switches................................... 41
Shifting.......................................... 41
Stopping boat ............................... 43
Stopping engine............................ 43
Procedure......................................... 43
Procedure......................................... 44
Trimming outboard motor............. 44
Adjusting trim angle for manual tilt
models .......................................... 45
Adjusting trim angle (power tilt
models) ......................................... 45
Adjusting boat trim ........................... 46
Tilting up and down ...................... 47
Procedure for tilting up (manual tilt
models) ......................................... 47
Procedure for tilting up (power tilt
models) ......................................... 48
Procedure for tilting down (manual
tilt models) .................................... 49
Procedure for tilting down (power
tilt models) .................................... 49
Shallow water .............................. 50
Cruising in shallow water (manual
tilt models) .................................... 50
Power tilt models.............................. 51
Cruising in other conditions.......... 52
Maintenance.................................... 53
Transporting and storing outboard
motor ......................................... 53
Clamp screw mounting models ....... 53
Storing outboard motor.................... 54
Procedure......................................... 54
Lubrication ....................................... 55
Flushing power unit .......................... 55
Cleaning the outboard motor ........... 56
Checking painted surface of
outboard motor ............................. 56
Periodic maintenance ................... 56
Replacement parts ........................... 57
Severe operating conditions ............ 57
Maintenance chart 1......................... 58
Maintenance chart 2......................... 60
Greasing ........................................... 61
Cleaning and adjusting spark plug... 63
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Table of contents
Checking fuel filter ........................... 63
Inspecting idle speed ....................... 64
Changing engine oil.......................... 64
Inspecting wiring and connectors .... 66
Checking propeller ........................... 66
Removing propeller .......................... 67
Installing propeller ............................ 68
Changing gear oil ............................. 68
Cleaning fuel tank ............................ 70
Inspecting and replacing anode(s) ... 71
Checking battery (for electric start
models) ......................................... 71
Connecting the battery..................... 72
Disconnecting the battery ................ 72
Trouble Recovery ............................ 73
Troubleshooting ............................ 73
Temporary action in emergency ... 76
Impact damage ................................ 76
Replacing fuse ................................. 76
Power tilt will not operate................. 77
Starter will not operate..................... 77
Emergency starting engine .............. 78
Engine fails to operate .................. 79
Emergency engine operation ........... 79
Treatment of submerged motor .... 79
INDEX ............................................... 80
U60R79E0.book Page 3 Wednesday, December 18, 2013 1:32 PM

1
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 neu-
tral, 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 be-
come entangled with internal rotating parts of
the engine, resulting in serious injury or
death.
Keep the top cowling in place whenever pos-
sible. Do not remove or replace the top cowl-
ing with the engine running.
Only operate the engine with the top cowling
removed according to the specific instruc-
tions 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 en-
gine has cooled.
EMU33651
Electric shock
Do not touch any electrical parts while start-
ing or operating the engine. They can cause
shock or electrocution.
EMU34791
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.
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 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 be-
come entangled, preventing it from function-
ing.
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.
EMU33811
Gasoline
Gasoline and its vapors are highly flamma-
ble and explosive. Always, refuel according
to the procedure on page 36 to reduce the
risk of fire and explosion.
U60R79E0.book Page 1 Wednesday, December 18, 2013 1:32 PM

Safety information
2
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, 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.
EMU33901
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
exhaust outlets.
EMU33781
Modifications
Do not attempt to modify this outboard mo-
tor. 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 im-
portant 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 com-
mon 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 mi-
nimum, children and non-swimmers should
always wear PFDs, and everyone should
wear PFDs when there are potentially hazard-
ous boating conditions.
EMU33732
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.
EMU33752
Passengers
Consult your boat manufacturer’s instruc-
tions for details about appropriate passenger
locations in your boat and be sure all passen-
gers are positioned properly before acceler-
ating 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 direc-
tion. Even when people are positioned prop-
erly, alert your passengers if you must make
any unusual maneuver. Always avoid jump-
ing waves or wakes.
EMU33762
Overloading
Do not overload the boat. Consult the boat
capacity plate or boat manufacturer for maxi-
mum weight and number of passengers. Be
sure that weight is properly distributed ac-
cording to the boat manufacturer’s instruc-
tions. Overloading or incorrect weight
distribution can compromise the boats han-
dling and lead to an accident, capsizing or
swamping.
U60R79E0.book Page 2 Wednesday, December 18, 2013 1:32 PM

Safety information
3
EMU33773
Avoid collisions
Scan constantly for people, objects, and oth-
er 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 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 an-
other 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.
ZMU06025
U60R79E0.book Page 3 Wednesday, December 18, 2013 1:32 PM

General information
4
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 sto-
len. EMU25192
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. Re-
cord this number in the space provided for
reference in case you need a new key.
EMU37292
EC Declaration of Conformity
(DoC)
This outboard motor conforms to certain por-
tions of the European Parliament directive re-
lating to machinery.
Each conformed outboard motor accompa-
nied with EC DoC.EC DoC contains the fol-
lowing information;
Name of Engine Manufacture
Model name
1. Outboard motor serial number location
1. Outboard motor serial number location
1. Key number
U60R79E0.book Page 4 Wednesday, December 18, 2013 1:32 PM

General information
5
Product code of model (Approved model
code)
Code of conformed directives
EMU25207
CE Marking
Outboard motors affixed with this “CE”mark-
ing conform with the directives of;
2006/42/EC, 94/25/EC - 2003/44/EC and
2004/108/EC.
1. CE marking location
1. CE marking location
ZMU06304
U60R79E0.book Page 5 Wednesday, December 18, 2013 1:32 PM

General information
6
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.
F8CMH, FT8DMH
U60R79E0.book Page 6 Wednesday, December 18, 2013 1:32 PM

General information
7
FT8DE, FT8DEP
U60R79E0.book Page 7 Wednesday, December 18, 2013 1:32 PM

General information
8
EMU33913
Contents of labels
The above warning labels mean as follows.
1
WARNING
EWM01692
Emergency starting does not have start-
in-gear protection. Ensure shift control is
in neutral before starting engine.
2
WARNING
EWM01682
Keep hands, hair, and clothing away
from rotating parts while the engine is
running.
Do not touch or remove electrical parts
when starting or during operation.
3
WARNING
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.
ZMU05706
12
3
U60R79E0.book Page 8 Wednesday, December 18, 2013 1:32 PM

General information
9
EMU33844
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
U60R79E0.book Page 9 Wednesday, December 18, 2013 1:32 PM

Specifications and requirements
10
EMU38092
Specifications
TIP:
“(AL)” stated in the specification data below
represents the numerical value for the alumi-
num propeller installed.
EMU2821U
Dimension and weight:
Overall length:
F8CMH 927 mm (36.5 in)
FT8DE 552 mm (21.7 in)
FT8DEP 552 mm (21.7 in)
FT8DMH 1038 mm (40.9 in)
Overall width:
F8CMH 375 mm (14.8 in)
FT8DE 331 mm (13.0 in)
FT8DEP 331 mm (13.0 in)
FT8DMH 358 mm (14.1 in)
Overall height S:
F8CMH 998 mm (39.3 in)
Overall height L:
F8CMH 1125 mm (44.3 in)
FT8DE 1186 mm (46.7 in)
FT8DEP 1186 mm (46.7 in)
FT8DMH 1186 mm (46.7 in)
Overall height X:
FT8DE 1255 mm (49.4 in)
FT8DMH 1255 mm (49.4 in)
Motor transom height S:
F8CMH 435 mm (17.1 in)
Motor transom height L:
F8CMH 562 mm (22.1 in)
FT8DE 557 mm (21.9 in)
FT8DEP 557 mm (21.9 in)
FT8DMH 557 mm (21.9 in)
Motor transom height X:
FT8DE 625 mm (24.6 in)
FT8DMH 625 mm (24.6 in)
Dry weight (AL) S:
F8CMH 38 kg (84 lb)
Dry weight (AL) L:
F8CMH 39 kg (86 lb)
FT8DE 45 kg (99 lb)
FT8DEP 50 kg (110 lb)
FT8DMH 45 kg (99 lb)
Dry weight (AL) X:
FT8DE 46 kg (101 lb)
FT8DMH 46 kg (101 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Rated power:
5.9 kW (8 HP)
Idle speed (in neutral):
1000–1100 r/min
Power unit:
Type:
4-stroke SOHC L2 4 valves
Total displacement:
197 cm³ (12.0 c.i.)
Bore ×stroke:
56.0 ×40.0 mm (2.20 ×1.57 in)
Ignition system:
CDI
Spark plug (NGK):
BR6HS-10
Spark plug gap:
0.9–1.0 mm (0.035–0.039 in)
Steering system:
F8CMH Tiller handle
FT8DE Remote steering
FT8DEP Remote steering
FT8DMH Tiller handle
Starting system:
F8CMH Manual starter
FT8DE Electric starter
FT8DEP Electric starter
FT8DMH Manual starter
Starting carburetion system:
Choke valve
U60R79E0.book Page 10 Wednesday, December 18, 2013 1:32 PM

Specifications and requirements
11
Valve clearance IN (cold engine):
0.15–0.20 mm (0.0059–0.0079 in)
Valve clearance EX (cold engine):
0.20–0.25 mm (0.0079–0.0098 in)
Cold cranking amps (CCA/EN):
FT8DE 347–411 A
FT8DEP 347–411 A
Min. rated capacity (20HR/IEC):
FT8DE 40 Ah
FT8DEP 40 Ah
Maximum generator output:
6 A
Lower unit:
Gear shift positions:
Forward-neutral-reverse
Gear ratio:
F8CMH 2.08(27/13)
FT8DE 2.92(38/13)
FT8DEP 2.92(38/13)
FT8DMH 2.92(38/13)
Trim and tilt system:
F8CMH Manual tilt
FT8DE Manual tilt
FT8DEP Power tilt
FT8DMH Manual tilt
Propeller mark:
F8CMH N
FT8DE R
FT8DEP R
FT8DMH R
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Min. research octane number (RON):
90
Fuel tank capacity:
12 L (3.17 US gal, 2.64 Imp.gal)
Recommended engine oil:
YAMALUBE 4 or 4-stroke outboard
motor oil
Recommended engine oil grade 1:
SAE 10W-30/10W-40/5W-30
API SE/SF/SG/SH/SJ/SL
Engine oil quantity:
0.8 L (0.85 US qt, 0.70 Imp.qt)
Lubrication system:
Wet sump
Recommended gear oil:
YAMALUBE outboard gear oil or Hypoid
gear oil
Recommended gear oil grade:
SAE 90 API GL-4
Gear oil quantity:
F8CMH 0.150 L (0.159 US qt,
0.132 Imp.qt)
FT8DE 0.370 L (0.391 US qt,
0.326 Imp.qt)
FT8DEP 0.370 L (0.391 US qt,
0.326 Imp.qt)
FT8DMH 0.370 L (0.391 US qt,
0.326 Imp.qt)
Tightening torque:
Spark plug:
24 Nm (2.45 kgf-m, 17.7 ft-lb)
Propeller nut:
F8CMH 17 Nm (1.73 kgf-m, 12.5 ft-lb)
FT8DE 21 Nm (2.14 kgf-m, 15.5 ft-lb)
FT8DEP 21 Nm (2.14 kgf-m, 15.5 ft-lb)
FT8DMH 21 Nm (2.14 kgf-m, 15.5 ft-lb)
Engine oil drain bolt:
24 Nm (2.45 kgf-m, 17.7 ft-lb)
Noise and vibration level:
Operator sound pressure level (ICOMIA
39/94):
77.0 dB(A)
Vibration on tiller handle (ICOMIA 38/94):
Vibration on tiller handle is under 2.5
m/s²
U60R79E0.book Page 11 Wednesday, December 18, 2013 1:32 PM

Specifications and requirements
12
EMU33555
Installation requirements
EMU33565
Boat horsepower rating
WARNING
EWM01561
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.
EMU40491
Mounting outboard motor
WARNING
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 28.
EMU33582
Remote control requirements
WARNING
EWM01581
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.
EMU25695
Battery requirements
EMU25723
Battery specifications
The engine cannot be started if battery volt-
age 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]
EMU34196
Propeller selection
Next to selecting an outboard motor, select-
ing the right propeller is one of the most im-
portant purchasing decisions a boater can
make. The type, size, and design of your pro-
peller have a direct impact on acceleration,
top speed, fuel economy, and even engine
life. Yamaha designs and manufactures pro-
pellers for every Yamaha outboard motor and
every application.
Your outboard motor came with a Yamaha
propeller selected to perform well over a
range of applications, but there may be uses
where a different propeller would be more
appropriate.
Cold cranking amps (CCA/EN):
FT8DE 347–411 A
FT8DEP 347–411 A
Min. rated capacity (20HR/IEC):
FT8DE 40 Ah
FT8DEP 40 Ah
U60R79E0.book Page 12 Wednesday, December 18, 2013 1:32 PM

Specifications and requirements
13
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 66.
EMU25771
Start-in-gear protection
Yamaha outboard motors or Yamaha-ap-
proved 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 be-
fore starting the engine.
EMU39693
Engine oil requirements
Select an oil grade according to the average
temperatures in the area where the outboard
motor will be used.
If oil grades listed under Recommended en-
gine oil grade 1 are not available, select an al-
ternative oil grade listed under
Recommended engine oil grade 2.
Recommended engine oil grade 1
Recommended engine oil grade 2
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
ZMU04606
-
x
123
Recommended engine oil:
YAMALUBE 4 or 4-stroke outboard
motor oil
Recommended engine oil grade 1:
SAE 10W-30/10W-40/5W-30
API SE/SF/SG/SH/SJ/SL
Recommended engine oil grade 2:
SAE 15W-40/20W-40/20W-50
API SH/SJ/SL
Engine oil quantity:
0.8 L (0.85 US qt, 0.70 Imp.qt)
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
U60R79E0.book Page 13 Wednesday, December 18, 2013 1:32 PM

Specifications and requirements
14
EMU36361
Fuel requirements
EMU40202
Gasoline
Use a good quality gasoline that meets the
minimum octane rating. If knocking or ping-
ing occurs, use a different brand of gasoline
or premium unleaded fuel.
NOTICE
ECM01982
Do not use leaded gasoline. Leaded
gasoline can seriously damage the en-
gine.
Avoid getting water and contaminants in
the fuel tank. Contaminated fuel can
cause poor performance or engine dam-
age. Use only fresh gasoline that has
been stored in clean containers.
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. 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 en-
gine 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 water-
separating marine fuel filter assembly (10 mi-
cron minimum) between your boat’s fuel tank
and outboard motor when using ethanol. Eth-
anol is known to allow moisture to be ab-
sorbed into boat fuel tanks and systems.
Moisture in the fuel can cause corrosion of
metallic fuel system components, starting
and running complaints and require addition-
al fuel system maintenance.
EMU36331
Anti-fouling paint
A clean hull improves boat performance. The
boat bottom should be kept as clean of mari-
ne 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.
Recommended fuel:
Regular unleaded gasoline
Min. research octane number (RON):
90
U60R79E0.book Page 14 Wednesday, December 18, 2013 1:32 PM