Yamaha FX SHO, FX Cruiser SHO Service Manual
WaveRunner
FX SHO
FX Cruiser SHO
SERVICE MANUAL
*LIT186160312*
LIT-18616-03-12
F1W-28197-1K-11
E
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, passengers, a bystander, or a person inspecting or repairing the watercraft.
CAUTION:
A CAUTION indicates special precautions that must be taken to avoid damage to the watercraft.
NOTE:
A NOTE provides key information to make procedures easier or clearer.
WaveRunner
FX SHO, FX Cruiser SHO
SERVICE MANUAL
©2007 by Yamaha Motor Corporation, USA
1st Edition, December 2007
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation, USA
is expressly prohibited.
Printed in USA
LIT-18616-03-12
Contents
E
General information
Specification
Periodic check and adjustment
Fuel system
GEN
INFO
SPEC
CHK
ADJ
FUEL
1
2
3
4
Power unit
Jet pump unit
Electrical system
Hull and hood
POWR
JET
PUMP
–+
ELEC
HULL
HOOD
5
6
7
8
Trouble analysis
TRBL
ANLS
9
GEN
INFO
E
Chapter 1
General information
How to use this manual.................................................................................1-1
Manual format............................................................................................1-1
Symbols.....................................................................................................1-2
Abbreviation...............................................................................................1-3
Grease table ..............................................................................................1-3
Safety while working......................................................................................1-4
Fire prevention...........................................................................................1-4
Ventilation..................................................................................................1-4
Self-protection ...........................................................................................1-4
Parts, lubricants, and sealants ..................................................................1-4
Good working practices .............................................................................1-5
Disassembly and assembly .......................................................................1-5
Identification number.....................................................................................1-6
Primary l.D. number...................................................................................1-6
Engine serial number.................................................................................1-6
Jet pump unit serial number ......................................................................1-6
Hull identification number (H.l.N.)..............................................................1-6
Special service tool .......................................................................................1-7
Measuring..................................................................................................1-7
Removal and installation ...........................................................................1-9
Feature and benefit......................................................................................1-14
Watercraft overview.................................................................................1-14
Engine overview ......................................................................................1-15
Air filter case and air filter element ..........................................................1-16
Supercharger assembly...........................................................................1-16
Air cooler assembly .................................................................................1-17
Intake system ..........................................................................................1-17
Electronic control throttle valve (ETV) system.........................................1-18
Cylinder head assembly ..........................................................................1-19
Hydraulic timing chain tensioner..............................................................1-19
Ignition coil...............................................................................................1-20
Piston and connecting rod .......................................................................1-20
Cylinder block and crankcase..................................................................1-21
Knock sensor...........................................................................................1-21
Lubrication system...................................................................................1-22
Oil pump assembly ..................................................................................1-23
Oil pan .....................................................................................................1-24
Oil separator tank ....................................................................................1-25
Oil cooler assembly .................................................................................1-25
Oil filter ....................................................................................................1-26
Exhaust system .......................................................................................1-26
Cooling system ........................................................................................1-27
GEN
INFO
Water cooled rectifier regulator ...............................................................1-28
In-tank fuel pump module ........................................................................1-29
Large intermediate housing and oil seal..................................................1-30
Intake grate..............................................................................................1-30
Reverse gate assembly ...........................................................................1-31
QSTS.......................................................................................................1-31
Multifunction meter ..................................................................................1-32
Right multifunction display (FX Cruiser SHO)...................................1-35
Average speed, tripmeter, and trip time measurements ...................1-36
Electrical system......................................................................................1-37
Yamaha diagnostic system (YDIS) ...................................................1-37
Cruise assist and no-wake mode......................................................1-37
Slant detection switch .......................................................................1-38
Off-throttle steering (OTS) system .................................................... 1-39
L-MODE (low-rpm mode) and yamaha security system ...................1-39
Remote control transmitter................................................................ 1-41
E
1
2
Technical tips ...............................................................................................1-42
Engine control..........................................................................................1-42
Cruise assist control.......................................................................... 1-43
No-wake mode control ...................................................................... 1-44
Reverse with traction control............................................................. 1-45
Idle speed control..............................................................................1-45
Over revolution control......................................................................1-45
L-MODE (LOW-RPM MODE) control................................................1-45
Slant detection control.......................................................................1-45
High intake air pressure control ........................................................1-46
Knock control ....................................................................................1-46
Off-throttle steering (OTS) control ...........................................................1-47
Remote control transmitter control ..........................................................1-48
Warning control .......................................................................................1-49
Overheat warning control..................................................................1-49
Oil pressure warning control .............................................................1-49
ETV failure control.............................................................................1-49
Cam position sensor failure control................................................... 1-50
Battery disconnection warning ..........................................................1-50
Fail-safe function table ............................................................................1-51
3
4
5
6
7
8
9
GEN
INFO
How to use this manual
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.
• Parts are shown and detailed in an exploded diagram and are listed in the component list (refer to
1 in the figure below for an example page).
• The component list consists of part names and quantities (refer to 2 in the figure below).
• Symbols are used to indicate important aspects of a procedure, such as the grade of lubricant and
lubrication point (refer to 3 in the figure below).
• Tightening torque specifications are provided in the exploded diagrams (refer to 4 in the figure
below for an example), and in the related detailed instructions. Some torque specifications are
listed in stages as torque figures or angles in degrees.
• Separate procedures and illustrations are used to explain the details of removal, checking, and
installation where necessary (refer to 5 in the figure below for an example page).
NOTE:
For troubleshooting procedures, refer to “Trouble analysis” in Chapter 9.
E
4
3
1
2
5
1-1
GEN
INFO
How to use this manual
E
12
GEN
INFO
34
SPEC
CHK
ADJ
56
FUEL
JET
POWR
78
– +
ELEC
90
PUMP
HULL
HOOD
TRBL
ANLS
AB
Symbols
Symbols 1 to 9 are designed to indicate the
content of a chapter.
1 General information
2 Specification
3 Periodic check and adjustment
4 Fuel system
5 Power unit
6 Jet pump unit
7 Electrical system
8 Hull and hood
9 Trouble analysis
Symbols 0 to E indicate specific data.
0 Special service tool
A Specified oil or fluid
B Specified engine speed
C Specified tightening torque
D Specified measurement
E Specified electrical value
(resistance, voltage, electric current)
1
2
3
4
CD
T
.
R
.
EF
E
GH
A
IJ
M
KL
LT
271
MN
LT
572
1280B1104J
GM
LT
242
SS
Symbols F to I in an exploded diagram indicate the grade of lubricant and the lubrication
point.
F Apply 4-stroke motor oil
G Apply water resistant grease
(Yamaha grease A)
H Apply ThreeBond 1104J or ThreeBond 1280B
I Apply molybdenum disulfide grease
Symbols J to N in an exploded diagram indicate the type of sealant or locking agent and
the application point.
J Apply Gasket Maker
K Apply LOCTITE 271 (red)
L Apply LOCTITE 242 (blue)
M Apply LOCTITE 572
N Apply silicone sealant
NOTE:
Additional symbols may be used in this manual.
5
6
7
8
1-2
9
GEN
INFO
Abbreviation
The following abbreviations are used in this service manual.
Abbreviation Description
API American Petroleum Institute
APS Accelerator position sensor
BOW Bow end
DOWN Downside
ECM Electronic Control Module
ETV Electronic throttle valve
EX Exhaust
IN Intake
OL Overload
OTS Off-throttle steering system
PORT Port side
QSTS Quick Shift Trim System
RPM Revolutions Per Minute
SAE Society of Automotive Engineers
How to use this manual
E
STBD Starboard side
STERN Stern end
TCI Transistor Controlled Ignition
TDC Top Dead Center
TPS Throttle Position Sensor
UP Upside
YDIS Yamaha Diagnostic System
YEMS Yamaha Engine Management System
Grease table
The following table contains sealants, locking agents, and lubricants used in this service manual
that are not listed on the “Symbols” page.
Symbol Name Application
EP
SG
1194E
Epnoc grease AP #0 Lubricant
Silicone grease Water resistant grease
ThreeBond 1194E Sealant
1-3
GEN
INFO
Safety while working
E
Safety while working
To prevent and 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.
Self-protection
Protect your eyes by wearing safety glasses or
safety goggles during all operation 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
2
3
4
Parts, lubricants, and sealants
Use only genuine Yamaha parts, lubricants,
and sealants, or those recommended by
Yamaha, when servicing or repairing the
watercraft.
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.
1. Avoid contact with skin. Do not, for example, place a soiled rag in your pocket.
2. 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.
3. Change and wash clothing as soon as
possible if soiled with lubricants.
4. To protect your skin, apply a protective
cream to your hands before working on the
watercraft.
5
6
7
8
1-4
9
GEN
INFO
Safety while working
E
5. Keep a supply of clean, lint-free cloths for
wiping up spills, etc.
6. Maintain good standards of personal and
industrial hygiene.
Good working practices
Special service tool
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.
Disassembly and assembly
1. Use compressed air to remove dust and
dirt during disassembly.
2. Apply oil or fluid to the contact surfaces of
moving parts before assembly.
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.
1-5
GEN
INFO
Identification number
E
Identification number
Primary l.D. number
The primary l.D. number is stamped on a label
attached to the inside of the engine compartment.
Starting primary l.D. number:
F1W: 800101
Engine serial number
The engine serial number is stamped on a
label attached to the engine unit.
NOTE:
• The label stamped with the engine serial
number is located on the cylinder head
cover. Remove the engine cover to check
the engine serial number.
• Slide the engine cover rearward, and then lift
the cover to remove it.
1
2
3
Starting serial number:
6S5: 1000001
Jet pump unit serial number
The jet pump unit serial number is stamped on
a label attached to the intermediate housing.
Hull identification number (H.l.N.)
The H.l.N. is stamped on a plate attached to
the boarding platform.
4
5
6
7
1-6
8
9
GEN
INFO
Special service tool
E
Special service tool
Using the correct special tools recommended
by Yamaha will aid the work and enable accurate assembly and tune-up. Improvisations
and using improper tools can damage the
equipment.
NOTE:
• For USA and Canada, use part numbers
starting with “YB-”, “YM-”, “YU-”, or “YW-.”
• For other countries, use part numbers starting with “90890-.”
Measuring
1 Gauge stand
90890-06725
4 Dial gauge
YU-03097
90890-01252
5 Compression gauge extension
90890-06582
2 Dial gauge stand set (use needle only)
YB-06585
3 Dial gauge needle
90890-06584
6 Compression gauge
YU-33223
90890-03160
7 Fuel pressure gauge adapter
YW-06842
90890-06842
1-7
GEN
INFO
Special service tool
E
8 Fuel pressure gauge
YB-06766
90890-06786
9 Leakage tester
90890-06840
C Digital multimeter
YU-34899-A
D Peak voltage adapter
YU-39991
E Digital circuit tester
90890-03174
1
2
3
0 Air cooler attachment
90890-06731
A YDIS (connecting kit)
60V-85300-04
B YDIS (CD-ROM, Ver. 1.30)
60V-WS853-04
F Peak voltage adapter B
90890-03172
G Spark checker
YM-34487
Ignition tester
90890-06754
4
5
6
7
1-8
8
9
GEN
INFO
Special service tool
E
H Test harness (3 pins)
YB-06877
Test harness HM090-3 (3 pins)
90890-06877
I Lower unit pressure/vacuum tester
YB-35956-A
J Vacuum/pressure pump gauge set
90890-06756
Removal and installation
1 Oil filter wrench
90890-06830
2 Exhaust pipe wrench
90890-06726
3 Bearing separator
90890-06534
K Test harness (3 pins)
YB-06870
Test harness SMT250-3 (3 pins)
90890-06870
L Test harness (2 pins)
90890-06850
4 Slide hammer and adapters
YB-06096
5 Bearing puller assembly
90890-06535
6 Stopper guide plate
90890-06501
1-9
GEN
INFO
Special service tool
E
7 Stopper guide stand
90890-06538
8 Shaft holder
90890-06721
9 Driver handle
90890-06722
C Valve spring compressor
YM-04019
90890-04019
D Compressor adapter
YM-04114
Valve spring compressor attachment
90890-04114
E Valve guide remover
YB-06801
90890-06801
1
2
3
4
0 Bearing inner race attachment
90890-06661
A Coupler wrench
90890-06729
B Camshaft wrench
90890-06724
F Valve guide installer
YB-06810
90890-06810
G Valve guide reamer
YM-01196
90890-06804
5
6
7
8
1-10
9
GEN
INFO
Special service tool
E
H Neway valve seat kit
YB-91044
I Valve seat cutter holder
90890-06812
J Valve seat cutter
Intake
90890-06720 (30°)
90890-06325 (45°)
90890-06324 (60°)
Exhaust
90890-06818 (30°)
90890-06555 (45°)
90890-06323 (60°)
M Rotor puller
90890-01080
N Driver handle (small)
YB-06229
O Driver rod LS
90890-06606
P Bearing and seal installer
YW-06356
K Crankshaft holder
YB-06562
90890-06562
L Flywheel puller
90890-06723
Q Bearing outer race attachment
90890-06623, 90890-06627, 90890-06628
R Forward bearing race installer
YB-06258
1-11
GEN
INFO
Special service tool
E
S Bearing pressure C
90890-02393
C
T Driver handle (large)
YB-06071
U Forward gear outer race installer
YB-41446
X Drive shaft holder
YB-06201
Drive shaft holder 6
90890-06520
Y Driver rod L3
90890-06652
Z Drive shaft needle bearing installer and
remover
YB-06194
1
2
3
V Ball bearing attachment
90890-06657
W Piston ring compressor
YM-08037
90890-05158
[ Needle bearing attachment
90890-06609
\ Bearing attachment
90890-06728
4
5
6
7
1-12
8
9
GEN
INFO
] Bearing cup installer
YB-06167
_ Shaft holder
90890-06730
a Needle bearing installer
YB-06434
Special service tool
E
b Bearing puller legs
YB-06523
c Bearing attachment
90890-06727
1-13
GEN
INFO
Feature and benefit
Watercraft overview
The FX SHO series features a newly designed deck, while keeping the popular hull design of the
FX. Both the deck and hull are made of NanoXcel, which is 25% lighter compared to conventional
materials. The fuel filler cap is now located under the hood.
Feature and benefit
M
E
1
A
0
9
1 Handlebar
2 Rear seat assembly
3 Front seat assembly
4 Foot well
5 Sponson
6 Gunwale
7 Pull-up cleat (FX Cruiser SHO)
8 Cooling water pilot outlet
9 Bow eye
0 Front hood assembly
A Fuel filler cap
B Intake grate
C Speed sensor (FX SHO)
Speed and water temperature sensor
(FX Cruiser SHO)
D Stern eye
E Drain plug
F Reverse gate
G Ride plate
1
8
2
7
3
4
6
L
K
J
I
H
G
F
5
H Jet thrust nozzle
I Reboarding step assembly
J Boarding platform
K Electric bilge pilot outlet
L Ski tow
M Hand grip
2
3
D
E
4
B
C
5
6
7
8
1-14
9
GEN
INFO
Feature and benefit
Engine overview
The FX SHO series features a newly designed 1.8 L in-line 4-cylinder supercharged engine.
Because of its light and compact design, this engine is roughly the same size as the MR-1 engine
used on the FX series watercraft. Both high output and low fuel consumption are achieved using
regular unleaded gasoline. The engine meets environmental regulations and complies with the 2006
U.S. EPA (Environmental Protection Agency) emission regulations and the 2008 CARB (California
Air Resources Board) 3-star emission regulations.
3
4
2
E
1
A
0
1 Air cooler assembly
2 Oil level gauge
3 Oil filler cap
4 Ignition coil
5 Rectifier regulator
6 4 in 1 exhaust system
7 Oil filter
8 Oil cooler assembly
9 Oil separator tank
0 Oil pump assembly
A Supercharger assembly
5
6
7
8
9
1-15
GEN
INFO
Air filter case and air filter element
The air filter case and air filter element have been newly designed to handle the increased intake air
volume. The air filter element itself is made of water-repellent material, which prevents water from
entering the engine. In addition, the air filter element is secured to the air filter case cover using
screws.
Feature and benefit
E
1
Supercharger assembly
The supercharger is located on the front of the engine, and is a centrifugal type that rotates the
impeller for supercharging. The impeller uses a step-up gear with 2 steps to transmit the rotation of
the crankshaft. The impeller rotates about 10 times faster than the crankshaft. The impeller drive
gear is equipped with a one-way clutch; therefore, even if the engine stops when the impeller is
rotating at high speed, the structure of the impeller allows it alone to continue rotating. The supercharger has excellent durability and is very quiet. In addition, the supercharger is easy to service.
32
1 Screw
2 Air filter element
3 Air filter case cover
1
2
3
4
DRIVEN GEAR
>>>Number of teeth:
IDLE GEAR
>>>Number of teeth
DRIVE GEAR ASSEMBLY
>>>Number of teeth:
EXAMPLE:
Turbine r/min
Trolling speed: 9.86 × 1,250 = 12,325 r/min
1 Impeller
2 Gear
3 One-way clutch
= (60/19) × (50/16) × Engine r/min
= 3.16 × 3.12 × Engine r/min
= 9.86 × Engine r/min
1
BIG:
SMALL:
5
2
16
6
50
19
60
7
3
8
1-16
9
GEN
INFO
Feature and benefit
Air cooler assembly
The air cooler assembly uses cooling water to cool the intake air that has been compressed in the
supercharger. While the air cooler assembly has an extremely compact design, it functions as a
highly efficient heat exchanger to cool the intake air.
È
1
2
É
E
1 Air cooler assembly
2 Supercharger assembly
È Compressed air
É Cooled air
Intake system
The intake system has incorporated an electronic control throttle valve (ETV). By using the ETV, the
intake system itself is compact and is able to perform various engine controls. Furthermore, the
intake air that passes through the ETV is balanced in the intake manifold before it is supplied to
each cylinder.
1
2
1 Intake manifold
2 Ribbon
3 Throttle body assembly
3
1-17
GEN
INFO
Electronic control throttle valve (ETV) system
The flow chart shows a typical ETV system.
The ETV system consists of a throttle lever, a throttle cable, an accelerator position sensor, electronic control throttle bodies, and an electronic control module (ECM).
Feature and benefit
E
A throttle cable connects the throttle lever and the APS. The accelerator position sensor (APS)
detects the changes in operation of the throttle lever and changes the output voltage of the APS
accordingly. This voltage is then transmitted from the APS to the ECM. In accordance with the voltage input from the APS, the ECM operates the DC motor, which is installed on the ETV, and sets
the throttle valve to the opening angle that corresponds to the changes in operation of the throttle
lever.
At the same time, the throttle position sensor (TPS), which is located on the same axle, detects the
changes in the opening angle of the throttle valve and outputs the information to the ECM for optimum operation.
4
1
2
5
1
2
3
4
ECM
1 Throttle body assembly
2 TPS
3 DC-motor
4 Throttle lever
5 Throttle cable
6 APS
3
6
5
6
7
8
1-18
9
GEN
INFO
Feature and benefit
Cylinder head assembly
The newly designed cylinder head has 4 valves per cylinder: 2 intake valves and 2 exhaust valves.
The shapes of the combustion chamber and piston have been designed to obtain the optimum compression ratio. The valve lifter is a direct-acting type with a valve pad. The valve spring is a single
type.
E
1
2
3
1 Valve lifter
2 Valve pad
3 Valve spring
1
2
EXIN
3
5
4 Intake valve
5 Exhaust valve
4
Hydraulic timing chain tensioner
A hydraulic timing chain tensioner has been adopted in order to ensure that the tension on timing
chain is maintained. When the engine is started and engine oil is supplied to the timing chain tensioner, the structure of the tensioner ensures that the rod is maintained in the proper position.
1 Timing chain tensioner
È Fully extended rod position
É Fully retracted rod position
1
ÉÈ
1-19
GEN
INFO
Ignition coil
The ignition coils are a direct-ignition type with a coil installed to each cylinder. The coils are
installed to the cylinder head cover using 2 bolts each, which ensures a secure installation and
waterproofing of the spark plug holes.
Feature and benefit
1
2
3
E
1
2
3
1 Engine cover
2 Bolt
3 Ignition coil
Piston and connecting rod
The pistons and connecting rods have been newly designed. The shape of the piston crown has
been designed to achieve the optimum compression ratio and the shape of the connecting rod has
been designed to handle the high output. Furthermore, a mark to indicate the installation direction
has been placed on the piston crown.
a
1
4
23
4
5
6
7
BOW
1 Piston
2 Drive coupling
3 Transfer shaft
4 Connecting rod
a Piston installation direction mark
8
9
1-20
GEN
INFO
Feature and benefit
Cylinder block and crankcase
The cylinder block and crankcase have been newly designed. Cast-in iron sleeves, which offer the
same high reliability of conventional sleeves, have been adopted. The crankshaft journal portions of
the crankcase use a ladder-deck structure in order to achieve high rigidity.
1
E
2
1 Cylinder block
2 Crankcase
Knock sensor
The knock sensor is installed directly to the cylinder block. The knock sensor detects vibration that
is generated by knocking in the combustion chambers and transmits the information to the ECM. If
the ECM determines that knocking is occurring, it adjusts the ignition timing to control the knocking
and protect the engine from damage.
1
1 Knock sensor
1-21
GEN
INFO
Lubrication system
The FX SHO employs a wet sump lubrication system, which is different from conventional models.
There are 2 oil pumps, the scavenge pump and feed pump, located in the oil pan at the bottom of
the engine to drawn in and pressure feed the engine oil.
Feature and benefit
1
2
E
1
2
3
C
B
0
A
E
D
5
89 7
3
4
6
4
5
6
7
1 Intake camshaft
2 Exhaust camshaft
3 Cylinder block
4 Crankshaft
5 Oil separator tank
6 Oil pan
7 Oil strainer
8 Oil pipe
9 Oil pump assembly (feed pump)
0 Relief valve
A Oil pump assembly (scavenge pump)
B Oil cooler assembly
C Oil filter
D Drive gear assembly
E Supercharger assembly
1-22
8
9
GEN
INFO
Feature and benefit
Oil pump assembly
The oil pump assembly is comprised of 2 oil pumps: the scavenge pump and the feed pump. The
scavenge pump pressure feeds engine oil from the oil pan to the oil separator tank. The feed pump
supplies engine oil from the oil pan to the various engine components.
E
3
1
2
4
1 Oil separator tank
2 Oil pump assembly (feed pump)
3 Oil pump assembly (scavenge pump)
4 Oil pump assembly
1-23
GEN
INFO
Oil pan
The wet-sump type oil pan is divided into 2 internal compartments. Engine oil in the inner oil pan is
pressure-fed to the various engine components by the feed pump. Engine oil in the outer oil pan is
sent to the oil separator tank by the scavenge pump, and then it flows into the inner oil pan. By using
2 internal compartments, a stable supply of engine oil is possible even under the harsh operating
conditions of watercraft.
1
Feature and benefit
2
E
3
1
2
3
6
4
4
5
5
6
È
7
É
1 Baffle plate
2 Strainer (feed)
3 Strainer (scavenge)
4 Oil pan
5 Outer oil pan
5
8
6 Inner oil pan
È To feed pump
É To scavenge pump
9
1-24
GEN
INFO
Feature and benefit
Oil separator tank
The scavenge pump pressure feeds the engine oil to the oil separator tank. The oil saparator tank
separates the gas from the engine oil. The gas is routed to the cylinder head cover as blow-by gas
and the engine oil flows into the inner oil pan at the center of the oil pan.
É
Ê
E
È
È From scavenge pump
É To cylinder head
Ê To inner oil pan
Oil cooler assembly
The mounting location for the oil filter is integrated into the oil cooler assembly. Cooling water flows
on both sides of the engine oil to effectively cool the oil.
A
É
È
È
1
A
É
1 Engine oil
2 Cooling water
È From jet pump unit
É To cooling water pilot outlet on port side
´
1-25
A-A
´
2
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