YAMAHA F100C PARTS CATALOGUE
F100B
F100C
SERVICE MANUAL
290429
60C-28197-5D-11
NOTICE
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.
1
F100B, F100C
SERVICE MANUAL
©2001 by Yamaha Motor Co., Ltd.
1st Edition, June 2001
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in the Netherlands
Contents
General information
Specifications
Periodic checks and adjustments
Fuel system
Power unit
GEN
INFO
SPEC
CHK
ADJ
FUEL
POWR
1
2
3
4
5
Lower unit
Bracket unit
Electrical systems
Troubleshooting
Index
LOWR
BRKT
–+
ELEC
TRBL
SHTG
6
7
8
9
GEN
INFO
General information
How to use this manual.................................................................................1-1
Manual format............................................................................................1-1
Symbols.....................................................................................................1-2
Safety while working......................................................................................1-3
Fire prevention...........................................................................................1-3
Ventilation..................................................................................................1-3
Self-protection ...........................................................................................1-3
Parts, lubricants, and sealants ..................................................................1-3
Good working practices .............................................................................1-4
Disassembly and assembly .......................................................................1-4
Identification...................................................................................................1-5
Applicable models .....................................................................................1-5
Serial number ............................................................................................1-5
Features and benefits....................................................................................1-6
Power unit..................................................................................................1-6
Ignition system.........................................................................................1-11
Bracket unit and the PTT unit ..................................................................1-13
Cooling system ........................................................................................1-14
Lower unit ................................................................................................1-15
Technical tips ...............................................................................................1-16
Carburetor ...............................................................................................1-16
Acceleration pump...................................................................................1-17
Ignition system.........................................................................................1-18
Ignition timing control...............................................................................1-18
Lubrication system...................................................................................1-20
Cooling system ........................................................................................1-21
PTT (power trim and tilt) unit (F100B) .....................................................1-22
PTT (power trim and tilt) unit (F100C) .....................................................1-24
Propeller selection.......................................................................................1-25
Propeller size...........................................................................................1-25
Selection..................................................................................................1-25
60C5D11
Predelivery checks ......................................................................................1-25
Checking the fuel system ........................................................................1-25
Checking the gear oil...............................................................................1-26
Checking the engine oil ...........................................................................1-26
Checking the battery................................................................................1-26
Checking the outboard motor mounting position.....................................1-26
Checking the remote control cables ........................................................1-27
Checking the steering system .................................................................1-27
Checking the gearshift and throttle operation..........................................1-27
Checking the tilt system...........................................................................1-28
Checking the engine start switch and engine stop switch/
engine shut-off switch ............................................................................1-28
Checking the pilot water outlet ................................................................1-28
Test run ...................................................................................................1-28
Break-in ...................................................................................................1-29
After test run ............................................................................................1-29
1
2
3
4
5
6
7
8
9
60C5D11
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 consist of parts and part quantities, as well as bolt, screw, O-ring, and hose
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
1-1
60C5D11
T
R
.
.
How to use this manual
Symbols
The symbols below are designed to indicate the content of a chapter.
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 A in an exploded diagram indicate the grade of lubricant and the lubrication point.
7890A
A M
E
Apply Yamaha 4-stroke motor oil
7
Apply water resistant grease (Yamaha grease A)
8
Apply molybdenum disulfide grease
9
Symbols B to G in an exploded diagram indicate the type of sealant or locking agent and the application point.
BCDEFG
GM
4
LT
271
Specified measurement
5
Specified electrical value
6
(Resistance, Voltage, Electric current)
D C
Apply corrosion resistant grease
0
(Yamaha grease D)
Apply low temperature resistant grease
A
(Yamaha grease C)
LT
242
LT
572
SS
5
6
7
8
9
®
Apply Gasket Maker
B
Apply Yamabond No. 4
C
Apply LOCTITE
D
60C5D11
®
No. 271 (Red)
Apply LOCTITE
E
Apply LOCTITE
F
Apply silicon sealant
G
®
No. 242 (Blue)
®
No. 572
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.
60C5D11
6. Keep a supply of clean, lint-free cloths for
wiping up spills, etc.
Good working practices
Special tools
Use the recommended special 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
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.
1
2
3
4
5
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.
6
7
8
9
60C5D11
1-4
GEN
INFO
General information
Identification
Applicable models
This manual covers the following models.
Applicable models
F100BET, F100CET
Serial number
The outboard motor serial number is
stamped on a label attached to the port
clamp bracket.
1
NOTE:
If the serial number label is removed, VOID
marks will appear on the label.
Model name
Approved
model code
Starting
serial No.
L: 000101–
F100BET 60C
X: 200101–
L: 000101–
F100CET 60D
X: 200101–
F100B
È
F100C
É
Model name
1
Approved model code
2
Transom height
3
Serial number
4
S60C1090
1-5
60C5D11
Identification / Features and benefits
Features and benefits
Power unit
The F100B and F100C have been developed on the bases of the F100A, which has been recognized as being environmentally friendly, with established emission control, and which has received
high marks as an efficiently superior model with a high fuel economy.
Blowby gas, which is discharged from the engine, is returned to the intake silencer and reburned to
purify the exhaust gas.
The intake passage and exhaust passage have been arranged around the engine to make the
entire engine compact. When compared to a small, 2-stroke, V4 engine it is compact like an in-line,
three cylinder engine.
1
1
2
3
4
Silencer
1
Carburetor
2
Intake
È
Exhaust gas
É
Blowby gas
Ê
5
6
7
:
:
:
S60C1250
8
9
60C5D11
1-6
GEN
INFO
Piston and connecting rod
The piston pin has been installed by shrink fitting it to the small end of the connecting rod, as a
result, a circlip is not used to install the piston pin.
The top ring has been nitrided and the second ring has been chrome plated for use with leaded gasoline.
The connecting rod and end cap are processed as a single unit. After being heat treated, the single
unit is struck and the connecting rod and end cap are split apart as shown in the illustration. To
increase accuracy during installation, the connecting rod and end cap that were processed together
are always installed as a set.
The hollow volume at the top of the pistons has been made larger and the compression ration has
been lowered to increase reliability and durability.
General information
Top ring
1
Second ring
2
Oil ring
3
Connecting rod
4
Connecting rod end cap
5
F100B, F100C
F100A
Large hollow volume
6
Compression ratio (8.9)
7
Small hollow volume
8
Compression ratio (9.6)
9
S60C1270
1-7
60C5D11
Features and benefits
New plastic-region tightening bolts
To tighten the plastic-region tightening bolts, tighten them to the specified torque, and then tighten
them to the specified angle. By tightening the bolts to the specified angle, they are contracted to a
more accurate torque, making periodic maintenance checks and adjustments to, as well as additional tightening of the bolt unnecessary.
The cylinder head bolts, connecting rod bolts, and crankcase bolts have adopted this method to
help better control torque accuracy.
1
2
3
4
5
6
7
8
Specified torque
1
Specified angle
2
Connecting rod bolt
3
60C5D11
Cylinder head bolt
4
Crankcase journal bolt
5
9
1-8
GEN
INFO
Fuel pump and fuel filter
The fuel pump found in the F115A has been adopted. Although the quantity of parts has been
reduced and the necessary servicing time has been decreased as well, the ability of the fuel pump
to supply sufficient fuel has been retained.
A water separation fuel filter has been adopted. When water is mixed with fuel, it is separated and
precipitated at the bottom of the filter to prevent it from flowing to the carburetors. As water gathers
in the fuel cup, the red float inside the cup begins to rise, indicating that the accumulation of water is
taking place. After water has gathered in the fuel cup, the fuel filter can be disassembled to dispose
of the water.
General information
Fuel pump
1
Fuel filter
2
Red float
3
1-9
S60C1290
60C5D11
Features and benefits
Hour meter
A newly developed hour meter is incorporated on the F100B and F100C. The hour meter makes it
possible to check the hours of operation of the outboard motor, which can be used to keep track of
periodic checks and adjustments.
When the engine switch is turned to ON, all LED on the display will illuminate for two seconds, and
then the hours of operation will be displayed.
A signal from the Rectifier Regulator, via the green and white (G/W) lead, is sent to the hour meter
as the hours of operation accumulation.
The hours of operation cannot be deleted.
1
2
3
Hour meter
1
Grand (B)
2
Battery (Y)
3
Engine start switch
4
Starter motor
5
Fuse
6
Rectifier Regulator
7
Flywheel magnet
8
Signal (G/W)
9
4
5
6
7
S60C1300
8
60C5D11
9
1-10
GEN
INFO
Ignition system
A CDI system has been incorporated. The CDI unit uses three signals (i.e., crankshaft position,
engine revolution, and throttle position) to determine the optimum ignition timing.
Engine speed is controlled by the CDI unit to prevent damage to the engine when the engine temperature sensor detects that the engine temperature (i.e., water temperature) is too high, or when
the oil pressure switch detects that the oil pressure is too low, or when the engine idle speed is too
high.
In addition, when the engine overheats or when there is low oil pressure, the warning lamp flashes
and the buzzer sounds.
If the throttle position sensor and engine temperature sensor malfunction, the engine ignition timing
is set by the CDI unit to prevent damage to the engine.
General information
Oil pressure switch
1
Puler coil
2
Lighting coil
3
CDI unit
4
1-11
Throttle position sensor
5
Engine temperature sensor
6
Ignition coils
7
Fuel pump
8
60C5D11
Features and benefits
At low speeds, the exhaust gas flows into the water wall through a hole on the side of the exhaust
guide.
:
1
2
3
:
Exhaust gas flow at low speeds
È
Exhaust gas flow at high speeds
É
An identification mark has been stamped on the exhaust manifold and exhaust chamber.
S60C1330
4
5
6
7
Identification mark “C”
1
Exhaust manifold
2
Exhaust chamber
3
Identification mark “D”
4
60C5D11
8
9
1-12
GEN
INFO
Bracket unit and the PTT unit
F100B uses the bracket unit of 2-stroke, V4 outboard motor and F100C uses that of F100A.
In addition, the PTT unit has been adopted from the F100A as well.
The F100B uses the one found on the proven 2-stroke, V4, and V6 outboard motors. This PTT unit
has been constructed to feature a single tilt cylinder and two trim cylinders.
The PTT unit of the F100C has been adopted from the proven F100A. This PTT unit consists of a
single cylinder for both tilt and trim functions, making the unit compact and lightweight.
General information
Oil pump
The oil pump has been installed directly above the oil pan and to the exhaust guide.
In addition, the oil pump is operated directly by the drive shaft, therefore proper oil delivery can be
achieved.
Oil pump
1
OUT
2
1-13
3
4
IN
Oil pan
60C5D11
Features and benefits
Cooling system
A high capacity water pump and a large cylinder head water jacket have been incorporated to
enable better cooling.
A pressure control valve (PCV) has also been incorporated to control the cooling water pressure,
which in turn helps prevent water leakage from the power unit. When the cooling water pressure
becomes too high, the PCV opens and the cooling water flows through a bypass passage to the
upper case.
An additional water inlet, located in front of the trim tab, allows cooling water to flow into the exhaust
passage in the lower unit during high-speed operation. This extra cooling water properly cools the
high-temperature exhaust gas before it exits through the propeller boss, helping to prevent the rubber parts in the propeller boss from being damaged by high gas temperatures.
1
2
3
Water pump
1
Pressure control valve (PCV)
2
Trim tab
3
Cooling water
È
Exhaust gas
É
Exhaust gas/Cooling water mixture
Ê
4
5
6
7
8
60C5D11
9
1-14
GEN
INFO
Water pump
The water pump has been hard chrome plated to prevent wear from muddy water. By hard chrome
plating the water pump, wear resistance has been enhanced, and as a result, the time necessary
between part changes or maintenance has been extended.
General information
89ø
58ø
S60C1390
Blue identification paint
1
F100B F100C
Lower unit
The lower unit of the F100C does not contain a reverse gear shim. Therefore, it is not necessary to
set the position of a shim for the reverse gear.
Gear ratio
F100A 2.31 (30/13)
F100B 2.15 (28/13)
F100C 2.31 (30/13)
No reverse gear shim
1
Reverse gear shim
2
1-15
F100C
F100B
S60C1410
60C5D11
Features and benefits
Technical tips
Carburetor
Prime start
To facilitate the starting of a cold engine, an air-fuel mixture that is richer than normal is required.
For this reason, the Prime Start system has been adopted in the F100B and F100C. In the Prime
Start system, the thermo heater plunger is in a position that fully opens the fuel enrichment valve
while the engine is being started. Thus, fuel enrichment is achieved during the starting of the
engine, and continues while the engine is being warmed up. Once the engine is started, a signal is
sent from the pulser coil to the CDI, and from the CDI to the Prime Start to allow the wax to expand.
The expanded wax moves the thermo heater plunger in the direction to close the enrichment valve.
As a result, the volume of fuel that passes through the fuel enrichment valve decreases. A few minutes after the engine has started, the thermo heater plunger completely closes the fuel enrichment
valve, thus ending the fuel enrichment by the Prime Start system.
1
1
2
3
4
Prime Start
1
Carburetor #1/#3
2
Carburetor #2/#4
3
Fuel enrichment valve
4
Thermo heater plunger
5
Air
È
Fuel
É
Air-fuel mixture
Ê
5
6
7
8
9
60C5D11
1-16
GEN
INFO
Acceleration pump
The function of the acceleration pump is to ensure a smooth acceleration by preventing the air-fuel
mixture from becoming temporarily lean in case the throttle valve is opened suddenly. When the
throttle valve is opened suddenly, a large volume of air is introduced into the engine. However,
because fuel is heavier than air, it is not possible to supply the volume of fuel that is necessary for
the large volume of air that has been introduced. Thus, because it is not possible to achieve the airfuel mixture that is required by the engine, bucking or hesitation results. For this reason, the acceleration pump temporarily increases the fuel volume in order to adjust the air-fuel mixture to a ratio that
is necessary for the engine in case the throttle valve is opened suddenly.
Operation
When the throttle is opened suddenly, diaphragm (via the link that is connected to the throttle lever)
operates to pressurize the air in the dashpot. The pressurized air distributed to the carburetors by
passing through the in-line, one-way valve that is connected to the carburetors. The pressurized
and distributed air then utilizes the passage of the main air jet to flow into the main nozzle. The pressure of the air helps suck fuel from the main jet, which increases the fuel in the main nozzle, and
thus achieves fuel enrichment.
General information
Throttle lever link rod
1
Diaphragm
2
In-line, one-way valve
3
To carburetor #1
4
To carburetor #2
5
To carburetor #3
6
1-17
Main jet
7
Carburetor #4 (cutaway view)
8
Dashpot
9
Throttle lever
0
Carburetor #4 (side view)
A
60C5D11
Technical tips
Ignition system
The computer controlled CDI system has three basic modes of operation: starting, warm-up, and
normal operation.
Ignition timing control
Starting mode
Ignition timing is fixed at 10° BTDC. The starting mode cuts off when the engine has been started
and the engine speed is over 600 r/min.
Warm-up mode
The engine speed is kept at approximately 1,100 r/min by the computer. The four main situations,
based on the cooling water temperature, that this mode operates in are as follows:
1. Below 0 °C (32 °F), this mode lasts approximately 300 seconds.
2. From 0 °C (32 °F)–20 °C (68 °F), this mode lasts approximately 180 seconds.
3. From 20 °C (68 °F)–40 °C (104 °F), this mode lasts approximately 120 seconds.
4. Over 40 °C (104 °F), this mode does not operate.
The warm-up mode will cut off if the engine speed exceeds 4,000 r/min.
1
2
3
Normal operation
This mode operates between 5° ATDC and 35° BTDC. The ignition timing is automatically adjusted
by the computer. The computer receives three signals (i.e, crankshaft position, engine revolution,
and throttle position) every five microseconds, and then adjusts the ignition timing accordingly.
Two pulser coils send signals to the computer which then determines the crankshaft position and
engine revolution.
The throttle position sensor also sends signals to the computer which then determines the throttle
position. The microcomputer uses these three signals to determine the proper ignition timing.
Fail-safe controls
When the engine start switch is turned on, both low oil pressure and overheat warning lights will turn
on. After the engine is started and the engine operates normally, the warning lights will turn off.
This ignition system incorporates three Fail-safe controls that are described below.
• Over-revolution control
Over 6,150 r/min, the ignition to either cylinder #1 or #4 is cut. At 6,175 r/min, the ignition to
both cylinders #1 and #4 is cut. Over 6,200 r/min, the ignition to both cylinders #1 and #4, and
either #2 or #3 is cut. Over 6,225 r/min, the ignition to cylinders #1, #2, #3, and #4 is cut.
• Overheating control
From 0–2,000 r/min (after starting the engine), this mode will not operate for 60 seconds.
From 2,000 r/min, it will not operate for 21 seconds.
When the cooling water temperature is 95 °C (203 °F) or above, this mode starts. The buzzer
will sound and the warning light will turn on. Ignition to cylinders #1 and #4 will cut off and the
engine speed will gradually lower to approximately 2,000 r/min.
This mode will stop when the cooling water temperature is 79 °C (174 °F) and the throttle is
fully closed. The buzzer will then stop and the warning light will turn off.
4
5
6
7
8
9
60C5D11
1-18
GEN
INFO
• Low oil pressure control
Three seconds after starting the engine this mode does not operate.
When the oil pressure switch turns on oil pressure is 150 kPa (1.5 kg/cm
this mode starts. The buzzer will sound and the warning light will turn on. Ignition to cylinders
#1 and #4 will cut off and the engine speed will gradually lower to approximately 2,000 r/min.
This mode will stop when the oil pressure is 150 kPa (1.5 kg/cm
throttle is fully closed. The buzzer will then stop and the warning light will turn off.
Throttle position sensor
If the throttle position sensor is faulty, the ignition timing will automatically be fixed at 10° BTDC.
Engine temperature sensor
If the engine temperature sensor is faulty, the ignition timing will automatically be fixed at 10° BTDC.
Dual engine control system
This control system is used when two outboard motors are installed, along with a dual switch panel.
If the overheating or low oil pressure protection control modes on one of the two outboard motors is
activated, the same protection control mode on the other engine will be activated as well. However,
on the other engine, the warning light will not light and the buzzer will not sound.
General information
2
, 21.3 psi) or below,
2
, 21.3 psi) or above and the
1-19
60C5D11
Lubrication system
Technical tips
Pressure fed
Splash
Crankcase
Sleeve
Piston
Crankshaft pin
Crankshaft journal
Cylinder head
Intake and exhaust valves
Camshaft journal
Main gallery
Return
Camshaft
Oil pressure switch
• Low oil pressure warning
1
2
3
4
5
Return route
• Oil pressure
regulation
Oil filter
Oil pump with relief valve
Oil strainer
Oil pan
• Oil sump
• Oil cooling
• Filtration of foreign objects
• Suction/pressure feeding
of oil
• Prevention of air suction
• Filtration of large foreign objects
S60C1450
Return route
6
7
8
9
60C5D11
1-20
GEN
INFO
Cooling system
Flushing device
Cylinder head
General information
Cooling water
inlet
Water pump
Oil pan
Exhaust cover
Cylinder
Thermostat
Discharge
Pilot water
outlet
Pressure control
valve (PCV)
Exhaust
pipe
Trim tab
water inlet
Upper case
(water wall)
Propeller boss
Discharge
Discharge
S60C1460
1-21
60C5D11
Technical tips
PTT (power trim and tilt) unit (F100B)
The circuit of the PTT unit and the location of its major components are shown in the illustration
below.
1
2
3
Lower chamber shuttle valve
1
Up-relief valve
2
Pump chamber
3
Down-check valve
4
Check valve
5
Tilt ram
6
Trim and tilt housing
7
Reservoir
8
Filter screen
9
Shock valve
0
Passage to reservoir
A
Free piston check valve
B
Trim ram
C
Shock return valve
D
Passage to upper chamber of trim cylinders
E
Passage to lower chambers of tilt cylinder and
F
trim cylinders
Passage to upper chamber of tilt cylinder
G
Thermal valve
H
Manual valve
I
Lower chamber check valve
J
Upper chamber check valve
K
Upper chamber shuttle valve
L
Up-intake valve
M
Pump
N
Down-intake valve
O
Motor
P
4
5
6
7
8
60C5D11
9
1-22
GEN
INFO
Component identification
Description Notes
Up-relief valve PTT fluid flows upward above 10.8 MPa (110 kg/cm
Down-check valve PTT fluid flows easily to the left while some fluid flows to
Lower chamber check valve PTT fluid flows easily downward.
Lower chamber shuttle valve PTT fluid flows easily upward, pressure on top causes
Upper chamber check valve PTT fluid flows easily downward.
Upper chamber shuttle valve PTT fluid flows easily upward, pressure on top causes
Manual valve Port side, clockwise to release
Free piston check valve PTT fluid flows easily downward.
Shock valve PTT fluid flows downward above 16.7 MPa (170 kg/cm
Shock return valve PTT fluid flows easily upward.
General information
1,500 psi).
the right through a small restriction.
valve to move down.
valve to move down.
2,420 psi).
2
,
2
,
Check valve PTT fluid flows easily to the right while a restriction allows
some flow to the left.
Thermal valve PTT fluid flows to the left above 18.6 MPa (190 kg/cm
2,700 psi).
Down-intake valve PTT fluid flows easily downward.
Up-intake valve PTT fluid flows easily downward.
2
,
1-23
60C5D11
Technical tips
PTT (power trim and tilt) unit (F100C)
The circuit of the PTT unit and the location of its major components are shown in the illustration
below.
1
2
3
PTT cylinder
1
Free piston
2
Pressure-release valves
3
Check valve
4
Tilt piston
5
Trim piston
6
Ram
7
Manual valve
8
Main valve
9
Up-flow side
0
Shuttle piston
A
Down-flow side
B
Gear pump
C
Up-relief valve
D
Down-relief valve
E
Reservoir
F
4
5
S60C1480
6
7
8
60C5D11
9
1-24
GEN
INFO
Propeller selection
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 motor.
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 the
propeller blade or outside of the propeller
boss.
General information
Propeller diameter (in inches)
1
a
Propeller pitch (in inches)
b
Propeller type (propeller mark)
c
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.
Propeller size (in) Material
12 5/8 × 21 - K
13 × 19 - K
13 × 23 - K
13 × 25 - K
13 1/4 × 17 - K
13 1/2 × 15 - K
13 5/8 × 13 - K
Aluminum
× -
× -
S60C1110
S60C1120
14 × 11 - K
13 × 17 - K
13 × 19 - K
13 × 21 - K
13 × 23 - K
Stainless
13 × 25 - K
13 1/2 × 14 - K
13 1/2 × 16 - K
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
1-25
-
S60C1125
60C5D11
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