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.
All of the procedures in this manual are organized in a sequential, step-by-step format. The information has been compiled to provide the mechanic with an easy to read, handy reference that contains
comprehensive explanations of all disassembly, repair, assembly, and inspection operations.
In this revised format, the condition of a faulty component will precede an arrow symbol and the
course of action required will follow the symbol, e.g.,
• Bearings
Pitting/scratches → Replace.
To assist you in finding your way through this manual, the section title and major heading is given at
the top of every page.
ILLUSTRATIONS
The illustrations within this service manual represent all of the designated models.
CROSS REFERENCES
The cross references have been kept to a minimum. Cross references will direct you to the appropriate section or chapter.
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IMPORTANT INFORMATION
In this Service Manual particularly important information is distinguished in the following ways.
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, passenger(s), 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.
IMPORTANT:
This part has been subjected to change of specification during production.
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D
L
HOW TO USE THIS MANUAL
1 To help identify parts and clarify procedure steps, there are exploded diagrams at the start of
each removal and disassembly section.
2 Numbers are given in the order of the jobs in the exploded diagram.
3 Symbols indicate parts to be lubricated or replaced (see “SYMBOLS”).
4 A job instruction chart accompanies the exploded diagram, providing the order of jobs, names of
parts, notes in jobs, etc.
5 Dimension figures and the number of parts, are provided for fasteners that require a tightening
torque.
Example:
Bolt or screw size : M10 (D) × 25 mm (L)
6 Jobs requiring more information (such as special service tools and technical data) are described
sequentially.
10 × 25 mm
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12
GEN
INFO
34
SPEC
INSP
FUEL
ADJ
56
JET
POWR
PUMP
78
–+
HULL
ELEC
HOOD
90
TRBL
ANLS
AB
A50001-1-4
SYMBOLS
Symbols 1 to 9 are designed to indicate the
content of a chapter.
General Information
1
Specifications
2
Periodic Inspection and Adjustment
3
Fuel System
4
Power Unit
5
Jet Pump Unit
6
Electrical System
7
Hull and Hood
8
Trouble Analysis
9
Symbols 0 to E indicate specific data.
Special service tool
0
Specified oil or fluid
A
Specified engine speed
B
Specified tightening torque
C
Specified measurement
D
Specified electrical value
E
(resistance, voltage, electric current)
CD
T
.
R
.
EF
E
GH
AM
IJ
GM
KL
LT
271
4
LT
242
Symbols F to H in an exploded diagram indicate the grade of lubricant and the lubrication
point.
Apply Yamaha 2-stroke motor oil
F
Apply water resistant grease
G
(Yamaha grease A, Yamaha marine grease)
Apply molybdenum disulfide grease
H
Symbols I to N in an exploded diagram indicate the type of sealant or locking agent and
the application point.
PARTS, LUBRICANTS, AND SEALANTS ................................................1-2
GOOD WORKING PRACTICES ...............................................................1-3
DISASSEMBLY AND ASSEMBLY ............................................................ 1-4
SPECIAL SERVICE TOOLS ...........................................................................1-5
MEASURING AND DIAGNOSIS ............................................................... 1-5
REMOVAL AND INSTALLATION..............................................................1-7
2
3
4
5
6
7
8
9
GEN
INFO
IDENTIFICATION NUMBERS
1
E
A60700-0*
IDENTIFICATION NUMBERS
PRIMARY l.D. NUMBER
The primary l.D. number is stamped on a label
1
attached inside the engine compartment.
Starting primary l.D. number:
F1G: 800301
ENGINE SERIAL NUMBER
The engine serial number is stamped on a
label 1 attached to the engine unit.
Starting serial number:
60T: 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 1 attached to
the hull on the aft, starboard (right) side.
1-1
GEN
INFO
SAFETY WHILE WORKING
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.
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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 or safety shoes when necessary.
PARTS, LUBRICANTS, AND
SEALANTS
Use only genuine Yamaha parts, lubricants,
and sealants or those recommended by
Yamaha, when servicing or repairing the
watercraft.
1-2
GEN
INFO
SAFETY WHILE WORKING
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. 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
watercraft.
6. Keep a supply of clean, lint-free cloths for
wiping up spills, etc.
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GOOD WORKING PRACTICES
The right tools
1.
Use the recommended special service
tools to protect parts from damage. Use
the right tool in the right manner—do not
improvise.
Tightening torques
2.
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.
1-3
GEN
INFO
SAFETY WHILE WORKING
Non-reusable parts
3.
Always use new gaskets, seals, O-rings,
oil seals, 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 engine oil to the contact surfaces of
moving parts during assembly.
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3. Install bearings with the manufacture identification mark in the direction indication 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.
1-4
GEN
INFO
YU-34899-A90890-03174
1
YU-0309790890-01252
3
YU-03112
45
90890-03112
YB-0676690890-06786
6
YU-03017
7
90890-06759
SPECIAL SERVICE TOOLS
2
YW-06842
90890-06842
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SPECIAL SERVICE TOOLS
Using the special service tools recommended
by Yamaha will aid service and enable accurate assembly and tune-up. Improvisations
and using improper tools can damage the
equipment.
NOTE:
• For USA and Canada, use the special service tools starting with part numbers “J-,”
“YB-,” “YM-,” “YS-,” “YU-,” or “YW-.”
• For all other countries, use the special ser-vice tools starting with part number “90890-.”
Small end inside diametermm (in)26.995–27.008 (1.0628–1.0633)
*1
Measuring conditions:
Engine temperature 48 °C (118 °F), wide open throttle, with spark plugs removed from all cylinders.
The figures are for reference only.
*1
*
mm (in)11 (0.43)
kPa
(kgf/cm
2
, psi)
Orange: 83.903–83.906 (3.3033–3.3034)
Green: 83.907–83.910 (3.3034–3.3035)
Purple: 83.911–83.914 (3.3036–3.3037)
Model
GP1300R
640 (6.4, 91)
2-3
SPEC
MAINTENANCE SPECIFICATIONS
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ItemUnit
Crankshaft assembly
Crank width A mm (in)72.95–73.00 (2.872–2.874)
Deflection limit B mm (in)0.05 (0.002)
Deflection limit C mm (in)0.15 (0.006)
Big end side clearance D mm (in)0.250–0.750 (0.0098–0.0295)
Maximum small end axial
playE
Throttle body
Model/quantity60TA/3
ManufacturerSANSHIN
ID mark60T00
Trolling speedr/min1,250–1,450