Notice
This manual has been prepared by the Yamaha Motor Corporation, U.S.A, 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 the Yamaha Motor Corporation, U.S.A, 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. Authorised Yamaha dealers are notified periodically of modifications and significant changes in specifications and procedures, and these are incorporated in successive editions of this manual.
HOW TO USE THIS MANUAL
This manual provides the mechanic with descriptions of the operations of disassembly, repair, assembly, adjustment and inspection, each of which is presented in a sequential, step-by-step procedure.
To assist you to find your way about this manual, the Section Title and Major Heading is given at the head of every page.
An Index to contents is provided on the first page of each Section.
THE ILLUSTRATIONS
Some illustrations in this manual may differ from the model you have. This is because a procedure described may relate to several models, though only one may be illustrated. (The name of model described will be mentioned in the description).
To help you identify components and understand the correct procedures of disassembly and assembly, exploded diagrams are provided. Steps in the procedures are numbered thus; 1), 2), 3).
Parts shown in the illustrations are identified thus: (1), (2), (3).
REFERENCES
These have been kept to a minimum; however, when you are referred to another section of the manual, you are told the page number to go to.
WARNINGS; CAUTIONS AND NOTES
Attention is drawn to the various Warnings, Cautions and Notes which distinguish important information in this manual 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, 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.
IMPORTANT:
This part of the manual has been modified due to remodeling from the ’90 model to ’91 model.
SYMBOLS
Symbols (1) to (10) are designed as thumb-tabs to signal the content of a chapter:
- (1) General Information
- (2) Specification
- (3) General Service
- (4) Fuel System
- (5) Power Unit
- (6) Lower Unit
- (7) Bracket Unit
- (8) Electrical System
- (9) Trouble-shooting
- (10)Renewal information
Symbols (11) to (16) indicate specific data:
- (11) Recommended fuel
- (12) Lubricant
- (13) Engine speed
- (14) Tightening torque
- (15) Wear limit, Clearance
- (16) Resistance (Ω), Voltage (V), Electric current (A)
Symbols (17) to (20) in an exploded diagram indicate grade of lubricant and location of lubrication point:
- (17) Apply Yamaha two-cycle outboard oil
- (18) Apply Yamaha gear-case lubricant
- (19) Apply Yamaha marine grease A (All purpose)
- (20) Apply Yamaha marine grease D
Symbols (21) to (24) in an exploded diagram indicate grade of sealing or locking agent, and location of application point:
- (21) Apply Gasket maker
- (22) Apply Loctite 312
- (23) Apply Yamaha bond No.4
- (24) Apply Screw lock
NOTE:
In this manual, the above symbols may not be used in every case.