This manual has been prepared by Yamaha primarily for use by Yamaha dealers and their trained
mechanics when performing maintenance procedures and repairs to Yamaha equipment. It has
been written to suit the needs of persons who have a basic understanding of the mechanical and
electrical concepts and procedures inherent in the work, for without such knowledge attempted
repairs or service to the equipment could render it unsafe or unfit for use.
Because Yamaha has a policy of continuously improving its products, models may differ in detail
from the descriptions and illustrations given in this publication. Use only the latest edition of this
manual. Authorized Yamaha dealers are notified periodically of modifications and significant
changes in specifications and procedures, and these are incorporated in successive editions of this
manual.
Important information
Particularly important information is distinguished in this manual by the following notations:
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS
INVOLVED!
WARNING
Failure to follow WARNING instructions could result in severe injury or death to the machine
operator, a bystander, or a person inspecting or repairing the outboard motor.
CAUTION:
A CAUTION indicates special precautions that must be taken to avoid damage to the outboard motor.
NOTE:
A NOTE provides key information to make procedures easier or clearer.
After test run ............................................................................................1-17
3
4
5
6
7
8
9
6C13G11
GEN
INFO
General information
How to use this manual
Manual format
The format of this manual has been designed to make service procedures clear and easy to understand. Use the information below as a guide for effective and quality service.
1
Parts are shown and detailed in an exploded diagram and are listed in the components list.
2
Tightening torque specifications are provided in the exploded diagrams and after a numbered
step with tightening instructions.
3
Symbols are used to indicate important aspects of a procedure, such as the grade of lubricant
and lubrication point.
4
The components list consists of part names and part quantities, as well as bolt and screw dimensions.
5
Service points regarding removal, checking, and installation are shown in individual illustrations
to explain the relevant procedure.
NOTE:
For troubleshooting procedures, see Chapter 9, “Troubleshooting.”
1
40 mm
10 45 mm
60 mm
3
LOWR
Lower unit
No.Part nameQ’tyRemarks
1 Lower unit1
2 Plastic tie1
3Hose1
4 Check screw1
5 Gasket2
6 Dowel pin2
7 Bolt4 M10
8 Drain screw1
9Grommet1
10 Bolt1 M
11 Bolt1 M8
12 Thrust washer1
13 Propeller1
14 Washer1
15 Washer1
16 Cotter pin1
17 Propeller nut1
18 Trim tab1
6-5
Lower unit
Not reusable
Not reusable
Not reusable
4
2
62Y5A11
1
LOWR
Removing the drive shaft
1. Remove the drive shaft assembly and
pinion, and then pull out the forward
gear.
Disassembling the drive shaft
1. Install the pinion nut 1, tighten it finger
tight, and then remove the drive shaft
bearing 2 using a press.
CAUTION:
• Do not press the drive shaft threads
directly.
• Do not reuse the bearing, always
replace it with a new one.
Disassembling the forward gear
1. Remove the taper roller bearing from the
forward gear using a press.
The symbols below are designed to indicate the content of a chapter.
How to use this manual
General information
GEN
INFO
Specifications
SPEC
Periodic checks and adjustments
CHK
ADJ
Symbols 1 to 6 indicate specific data.
123456
Fuel system
FUEL
Power unit
POWR
Lower unit
LOWR
Bracket unit
BRKT
Electrical systems
ELEC
Troubleshooting
–+
TRBL
SHTG
1
2
3
4
Special tool
1
Specified oil or fluid
2
Specified engine speed
3
Specified tightening torque
4
Symbols 7 to C in an exploded diagram indicate the grade of lubricant and the lubrication point.
7890ABC
AM
EG
Apply Yamaha 4-stroke motor oil
7
Apply gear oil
8
Apply water resistant grease (Yamaha grease A)
9
Apply molybdenum disulfide grease
0
Symbols D to H in an exploded diagram indicate the type of sealant or locking agent and the application point.
DEFGH
GM
LT
271
Specified measurement
5
Specified electrical value
6
(resistance, voltage, electric current)
CI
Apply corrosion resistant grease
A
(Yamaha grease D)
Apply low temperature resistant grease
B
(Yamaha grease C)
Apply injector grease
C
LT
242
LT
572
SS
5
6
7
8
9
Apply Gasket Maker
D
Apply LOCTITE 271 (red)
E
Apply LOCTITE 242 (blue)
F
6C13G11
Apply LOCTITE 572
G
Apply silicon sealant
H
1-2
GEN
INFO
General information
Safety while working
To prevent an accident or injury and to
ensure quality service, follow the safety procedures provided below.
Fire prevention
Gasoline is highly flammable.
Keep gasoline and all flammable products
away from heat, sparks, and open flames.
Ventilation
Gasoline vapor and exhaust gas are heavier
than air and extremely poisonous. If inhaled
in large quantities they may cause loss of
consciousness and death within a short time.
When test running an engine indoors (e.g., in
a water tank) be sure to do so where adequate ventilation can be maintained.
1
Parts, lubricants, and sealants
Use only genuine Yamaha parts, lubricants,
and sealants or those recommended by
Yamaha, when servicing or repairing the outboard motor.
Under normal conditions, the lubricants mentioned in this manual should not harm or be
hazardous to your skin. However, you should
follow these precautions to minimize any risk
when working with lubricants.
Self-protection
Protect your eyes by wearing safety glasses
or safety goggles during all operations involving drilling and grinding, or when using an air
compressor.
Protect your hands and feet by wearing protective gloves and safety shoes when necessary.
1-3
1.Maintain good standards of personal and
industrial hygiene.
2.Change and wash clothing as soon as
possible if soiled with lubricants.
3.Avoid contact with skin. Do not, for
example, place a soiled rag in your
pocket.
4.Wash hands and any other part of the
body thoroughly with soap and hot water
after contact with a lubricant or lubricant
soiled clothing has been made.
5.To protect your skin, apply a protective
cream to your hands before working on
the outboard motor.
6C13G11
6.Keep a supply of clean, lint-free cloths for
wiping up spills, etc.
Good working practices
Special service tools
Use the recommended special service tools
to protect parts from damage. Use the right
tool in the right manner—do not improvise.
Tightening torques
Follow the tightening torque specifications
provided throughout the manual. When tightening nuts, bolts, and screws, tighten the
large sizes first, and tighten fasteners starting
in the center and moving outward.
Non-reusable parts
Always use new gaskets, seals, O-rings, cotter pins, circlips, etc., when installing or
assembling parts.
Safety while working / Identification
3.Install bearings with the manufacture
identification mark in the direction indicated in the installation procedure. In
addition, be sure to lubricate the bearings
liberally.
4.Apply a thin coat of water-resistant
grease to the lip and periphery of an oil
seal before installation.
5.Check that moving parts operate normally after assembly.
Identification
Applicable models
This manual covers the following models.
Applicable models
F50FED, F50FEHT, F50FET, FT50GET,
F60CEHT, F60CET, FT60DET
1
2
3
4
1
5
6
Disassembly and assembly
1.Use compressed air to remove dust and
dirt during disassembly.
2.Apply engine oil to the contact surfaces
of moving parts before assembly.
6C13G11
(*)
Hydro tilt model (For Europe)
(*)
Tiller handle model (For Oceania)
7
8
9
1-4
GEN
INFO
Serial number
The outboard motor serial number is
stamped on a label attached to the port
clamp bracket.
General information
S6C11010
Model name
1
Approved model code
2
Transom height
3
Serial number
4
Model name
Approved
model code
Starting
serial No.
F50FED
6C11000001–F50FEHT
F50FET
FT50GET6C21000001–
F60CEHT
6C51000001–
F60CET
FT60DET6C61000001–
(*)
Hydro tilt model (For Europe)
(*)
Tiller handle model (For Oceania)
1-5
6C13G11
Identification / Outline of features
Outline of features
New electronic fuel injected F50 and F60 outboard motors have a mainly redesigned fuel and intake
system based on the carbureted F60 outboard motor.
Power unit
• Single throttle body, single throttle valve
• Multi-point injection system, group injection
(#1/#4 and #2/#3)
• Group ignition system (#1/#4 and #2/#3)
• Large plastic intake manifold
• Compact plastic fuel rail
• Modularized intake system components
• Vapor separator with built-in pressure regulator
• Solenoid valve
• Fuel cooler
• Aluminum rocker arm
Electrical
• Compact electronic fuel injection system
• Self-diagnosis system and Yamaha Diagnostic
System
• Variable trolling RPM switch (optional for tiller
handle model)
• Throttle position sensor with learning function
(adjustment free)
• Compact charging system at low rpm
• Compact fuel injectors
• Fuel filter with water separator
1
1
2
3
4
5
6
Clamp bracket/upper case
• 2-piece upper case
• Upper portion case with oil sump
• Big capacity water wall structure around muffler
• Idle exhaust labyrinth structure
• Exclusive clamp bracket for permanent mount-
ing
Lower unit
• Same lower drive unit as carbureted F60 model
6C13G11
S6C11120
1-6
7
8
9
GEN
INFO
General information
Features and benefits
Fuel system
A pressure regulator is built into the vapor separator to obtain compact and simple fuel delivery
structure.
A plastic fuel rail is used to prevent it from corrosion and for light weight.
Fuel discharged from the pressure regulator returns to the vapor separator after cooling down
through the fuel cooler.
The fuel joint is used on the high pressure fuel hose to remove and/or install the intake unit easily.
Fuel filter (Optional)Fuel tank
Primer pump
Fuel filter with water separator
Fuel pump (Mechanical)
1
Fuel filter
Vapor separator
Electric fuel pump
Fuel cooler
Pressure regulator
injector
Fuel
#1
Fuel rail
Fuel
injector
#2#3#4
Fuel
injector
Fuel
injector
S6C11130
1-7
6C13G11
Features and benefits
Solenoid valve
Just after the engine is stopped, the cooling water supply is also stopped and the heat is conducted
to the vapor separator from the engine, causing birth of many fuel vapor gases.
The vapor gases are fed into the intake silencer to reburn them.
However, many vapor gases are sucked into the combustion chambers, causing a rich air and fuel
mixture, which is difficult to restart the engine.
So the solenoid valve has been used for better restarting engine while the engine is warm.
The solenoid valve stops the vapor gases not to return into the intake silencer.
1
2
3
Fuel tank
1
Fuel filter
2
Fuel pump
3
Fuel cooler
4
Return fuel hose
5
Pressure regulator
6
Solenoid valve
7
To throttle body
8
Fuel injector
9
Electric fuel pump
0
Fuel filter
A
Fuel
È
Vapor gas
É
4
5
6
7
8
6C13G11
9
1-8
GEN
INFO
Electronic control system
The electronic control system is built up by the sensors and the ECM (Electric control Module).
The ECM receives signals from the sensors and determines the air and fuel mixture (A/F), and ignition timing.
Under various condition, the ECM gives the best-suitable engine operation.
In addition, warning control, fail-safe control, a self-diagnosis function, etc., are equipped to
increase reliability.
General information
1
2
5
4
Sensor assembly
1
(intake air temperature and intake air
pressure)
ECM
2
Throttle position sensor
3
Oil pressure switch
4
6
3
Cooling water temperature sensor
5
Pulser coil
6
S6C11150
1-9
6C13G11
Features and benefits
ECM (Electric Control Module)
This engine is controlled by the ECM to obtain precision combustion under various operations, and
can realize high power output, low fuel consumption, and low emission.
The ECM controls the ignition timing, fuel injection timing, and the fuel injection volume, and
ensures that the optimum ignition timing and air and fuel ratio can be achieved in all operating conditions such as engine starting, normal operation, and quick acceleration.
The self-diagnosis function is incorporated into the ECM and can be easily found a malfunction
point by a personal computer with the optional software installed.
1
40
Pulser coil
16
Power source for sensors
36
Throttle position
sensor
17
Intake air pressure
sensor
46
Cooling water pressure sensor
31
Ground for sensors
38
Intake air temperature sensor
48
Cooling water temperature sensor
34
Shift position switch
Fuel injectors #1, #4
Fuel injectors #2, #3
Ignition coil #1, #4
Ignition coil #2, #3
Idle speed control (S1)
Idle speed control (S2)
Idle speed control (S3)
Idle speed control (S4)
Tachometer
Oil pressure warning
indicator
Overheat
warning
indicator
Check engine warning
indicator
Buzzer/DES switch
Solenoid valve
Fuel pump relay
3
4
18
1
23
6
20
21
7
26
8
25
9
DES switch
11
24
OUTPUTINPUT
Main relay
Relay
2
3
4
T
BZ
P
5
6
7
6C13G11
Flywheel
magnet
Rectifier Regulator
–+
Battery
27
Engine stop lanyard switch
10
Oil pressure switch
28
Variable trolling RPM switch (UP)
29
Variable trolling RPM switch
(DOWN)
14
Ground for ECM
5
Ground
15
Battery (+)
Engine start switch
Main relay
Diagnosis
45
13
Power for diagnosis lamp
Self-diagnosis
8
9
S6C11160
1-10
GEN
INFO
Variable trolling RPM switch (optional)
This device is an optional equipment for tiller handle model.
The idling and/or trolling rpm can be controlled in the range of 620 through 900 r/min with 50 r/min
interval.
Especially for 620 through 700 r/min, the engine rpm is controlled with 40 r/min interval.
Pushing and holding the switch changes rpm continuously at 50 r/min interval.
If engine rpm reaches to the ends of specified range, the rpm is no longer changed.
CAUTION:
Do not modify the variable trolling RPM switch.
Modification such as wire extension, disassembly, etc., can malfunction for the system and/
or damage the electrical components.
The performance of a boat and outboard
motor will be critically affected by the size
and type of propeller you choose. Propellers
greatly affect boat speed, acceleration,
engine life, fuel economy, and even boating
and steering capabilities. An incorrect choice
could adversely affect performance and
could also seriously damage the engine.
Use the following information as a guide for
selecting a propeller that meets the operating
conditions of the boat and the outboard
motor.
Propeller size
The size of the propeller is indicated on a
propeller blade, on the propeller boss end.
× -
a
bc
1
Selection
When the engine speed is at the full throttle
operating range (5,000–6,000 r/min), the
ideal propeller for the boat is one that provides maximum performance in relation to
boat speed and fuel consumption.
F50, F60
Propeller size (in)Material
10 × 15 - G
10 1/4 × 14 - G
10 3/8 × 13 - G
10 5/8 × 12 - G
10 3/4 × 16 - G
10 3/4 × 17 - G
Aluminum
11 × 15 - G
11 1/8 × 13 - G
11 1/4 × 14 - G
11 3/8 × 12 - G
11 5/8 × 11 - G
12 1/4 × 9 - G
1
2
3
4
× -
a
bc
× -
a
bc
S69W1030
S69W1040
10 1/4 × 14 - G
10 1/4 × 15 - G
10 1/4 × 16 - G
10 5/8 × 13 - G
Stainless
11 1/4 × 14 - G
11 1/2 × 13 - G
11 3/4 × 12 - G
12 × 11 - G
FT50, FT60
Propeller size (in)Material
14 × 11 - KAluminum
5
6
7
8
9
Propeller diameter (in inches)
a
Propeller pitch (in inches)
b
Propeller type (propeller mark)
c
6C13G11
S69W1050
1-12
GEN
INFO
General information
Predelivery checks
To make the delivery process smooth and
efficient, the predelivery checks should be
completed as explained below.
Checking the fuel system
1.Check that the fuel hoses are securely
connected and that the fuel tank is full
with fuel.
1
NOTE:
If the engine oil is below the minimum level
mark b, add sufficient oil until the level is
between a and b.
Recommended engine oil:
4-stroke motor oil
API: SE, SF, SG, SH, or SJ
SAE: 10W-30 or 10W-40
Engine oil quantity:
Without oil filter replacement:
2.5 L (2.64 US qt, 2.20 Imp qt)
Checking the gear oil level
1.Check the gear oil level.
CAUTION:
This is a 4-stroke engine. Never use premixed fuel.
Checking the engine oil level
1.Check the engine oil level.
a
b
S6C11030
S60V1290
Checking the battery
1.Check the capacity, electrolyte level, and
specified gravity of the battery.
Recommended battery capacity:
CCA/EN: 430 A
20HR/IEC: 70 Ah
Electrolyte specified gravity:
1.280 at 20 °C (68 °F)
2.Check that the positive and negative battery leads are securely connected.
1-13
6C13G11
Predelivery checks
Checking the outboard motor
mounting height
1.Check that the anti-cavitation plate is
aligned with the bottom of the boat. If the
mounting height is too high, cavitation
will occur and propulsion will be reduced.
Also, the engine speed will increase
abnormally and cause the engine to
overheat. If the mounting height is too
low, water resistance will increase and
reduce engine efficiency.
a
b
d
c
S6C11080
4.Check that the edge of a shift rod e is
aligned with the alignment mark f on
the bottom cowling.
f
e
1
2
3
4
NOTE:
The optimum mounting height is affected by
the combination of the boat and the outboard
motor. To determine the optimum mounting
height, test run the outboard motor at different heights.
2.Check that the clamp brackets are
secured with the clamp bolts.
Checking the remote control cables
1.Set the remote control lever or shift lever
to the neutral position and fully close the
throttle lever or throttle grip.
2.Check that the set pin a is aligned with
the alignment mark b.
3.Check that the alignment mark c is
aligned with the mark d.
S6C11090
g
WARNING
The shift/throttle cable joint must be
screwed in a minimum of 8.0 mm (0.31 in)
.
g
Checking the steering system
1.Check the steering friction for proper
adjustment.
S6C11110
5
6
7
8
6C13G11
9
1-14
GEN
INFO
General information
2.Check that the steering operates
smoothly.
È
É
Tiller handle model
È
Remote control model
É
3.Check that there is no interference with
wires or hoses when the outboard motor
is steered.
È
É
N
F
R
a
a
S69J1210
Tiller handle model
È
Remote control model
É
Checking the power trim and tilt
system
1.Check that the outboard motor tilts up
and down smoothly when operating the
power trim and tilt unit.
Checking the gear shift and throttle
operation
1. Check that the gear shift operates
smoothly when the remote control lever
or shift lever is shifted from neutral to forward or reverse.
2.Check that the throttle operates smoothly
when the throttle grip (tiller handle
model) is turned from the fully closed
position to the fully open position a.
Check that the throttle operates smoothly
when the remote control lever (remote
control model) is shifted from forward or
reverse to the fully open position a.
2.Check that there is no abnormal noise
produced when the outboard motor is
tilted up or down.
3.Check that there is no interference with
wires or hoses when the tilted-up outboard motor is steered.
4.Check that the trim meter points down
when the outboard motor is tilted all the
way down.
Checking the hydro tilt system
1.Check that the outboard motor tilts up
and down smoothly.
2.Fully tilt the outboard motor up, and then
lock the tilt stop lever 1 to check the lock
mechanism of the hydro tilt. Replace the
hydro tilt unit if necessary.
1-15
6C13G11
Predelivery checks
1
S6C11100
Checking the engine start switch and
engine stop lanyard switch
1.Check that the engine starts when the
engine start switch is turned to START.
2.Check that the engine turns off when the
engine start switch is turned to OFF.
È
È
É
1
2
3
4
É
Tiller handle model
È
Remote control model
É
3.Check that the engine turns off when the
engine stop lanyard switch is pushed or
engine stop lanyard is pulled from the
engine stop lanyard switch.
OFF
ON
START
S60V1070
Tiller handle model
È
Remote control model
É
Checking the cooling water pilot
hole
1.Check that cooling water is discharged
from the cooling water pilot hole.
5
6
7
8
9
6C13G11
1-16
GEN
INFO
General information
Test run
1.Start the engine, and then check that the
gear shift operates smoothly.
2.Check the engine idle speed after the
engine has been warmed up.
3.Operate at trolling speed.
4.Run the outboard motor for 1 hour at
2,000 r/min or at half throttle, then for
another hour at 3,000 r/min or at 3/4
throttle.
5.Check that the outboard motor does not
tilt up when shifting into reverse and that
water does not flow in over the transom.
NOTE:
The test run is part of the break-in operation.
After test run
1.Check for water in the gear oil.
2.Check for fuel leakage in the cowling.
3.Flush the cooling water passage with
fresh water using the flushing kit and with
the engine running at idle.
Break-in
During the test run, perform the break-in
operation in the following three stages.
1.One hour a at 2,000 r/min or at approximately half throttle
2.One hour b at 3,000 r/min or 3/4 throttle
and 1 minute out of every 10 at full throttle
3.Eight hours c at any speed, however,
avoid running at full speed for more than
5 minutes
È
ab
0
1
210
c
Hour
È
1-17
S69J1240
6C13G11
SPEC
Specifications
General specifications...................................................................................2-1
Dimension Bmm (in)1.17–1.19 (0.0461–0.0469)
Dimension Tmm (in)2.30–2.50 (0.0905–0.0984)
End gapmm (in)0.15–0.30 (0.0059–0.0118)
Side clearancemm (in)0.02–0.06 (0.0008–0.0024)
(*1)
Measure conditions:
Ambient temperature 20 °C (68 °F), wide open throttle, with spark plugs removed from all cylinders.
The figures are for reference only.
(*2)
The figures are for reference only.
Model
960 (9.6, 139.2)
2
2-5
6C13G11
Maintenance specification
ItemUnit
2nd piston ring
Dimension Bmm (in)1.47–1.49 (0.0579–0.0587)
Dimension Tmm (in)2.60–2.80 (0.1024–0.1102)
End gapmm (in)0.30–0.50 (0.0118–0.0197)
Side clearancemm (in)0.02–0.06 (0.0008–0.0024)
Oil ring
Dimension Bmm (in)2.36–2.48 (0.0929–0.0976)
Dimension T
End gapmm (in)0.20–0.70 (0.0079–0.0276)
Side clearancemm (in)0.04–0.18 (0.0016–0.0071)
Small end inside diametermm (in)15.985–15.998 (0.6293–0.6298)
Big end inside diametermm (in)36.000–36.024 (1.4173–1.4183)
Connecting rod big end side
clearance
Crankpin oil clearancemm (in)0.016–0.040 (0.0006–0.0016)
Big end bearing thickness