2003 Yamaha F25 HP outboard service repair manual

F25C T25C SERVICE MANUAL 65W-28197-1F-11 LIT-18616-02-61 *LIT186160261*

E A20000-1 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 succes- sive editions of this manual. A10001-0* F25C, T25C SERVICE MANUAL ©2003 by Yamaha Motor Corporation, USA 1st Edition, August 2003 All rights reserved. Any reprinting or unauthorized use without the written permission of Yamaha Motor Corporation, USA is expressly prohibited. Printed in USA LIT-18616-02-61

E HOW TO USE THIS MANUAL MANUAL FORMAT 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 refer- ence 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.

E 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, 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.

E 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. A circled number indicates a disassembly step. 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. Example: O-ring size 39.5 × 2.5 mm: Inside diameter (D) × Ring diameter (d) 5 Dimension figures and the number of parts, are provided for fasteners that require a tight- ening torque. Example: Bolt or screw size : M10 (D) × 25 mm (L) (2 pieces) 6 Jobs requiring more information (such as special tools and technical data) are described sequentially. d D 10 × 25 mm (2) D L

E A50001-1-4 SYMBOLS Symbols 1 to 9 are designed as thumb- tabs to indicate the content of a chapter. 1 General information 2 Specifications 3 Periodic inspection and adjustment 4 Fuel system 5 Power unit 6 Lower unit 7 Bracket unit 8 Electrical systems 9 Trouble-analysis Symbols 0 to E indicate specific data: 0 Special tool A Specified liquid B Specified engine speed C Specified torque D Specified measurement E Specified electrical value [Resistance (Ω), Voltage (V), Electric current (A)] Symbol F to H in an exploded diagram indicate the grade of lubricant and the location of the lubrication point: F Apply Yamaha 4-stroke outboard motor oil G Apply water resistant grease (Yamaha grease A, Yamaha marine grease) H Apply molybdenum disulfide oil Symbols I to N in an exploded diagram indicate the grade of the sealing or locking agent and the location of the application point: I Apply Gasket Maker ® J Apply Yamabond #4 (Yamaha bond number 4) K Apply LOCTITE ® No. 271 (Red LOCTITE) L Apply LOCTITE ® No. 242 (Blue LOCTITE) M Apply LOCTITE ® No. 572 N Apply silicon sealant 1 2 3 4 5 6 7 8 9 0 A B C D E F G H I J K L M N GEN INFO SPEC INSP ADJ FUEL POWR LOWR BRKT – + ELEC TRBL ANLS T R . . E A M GM 4 271 LT 242 LT 572 LT SS

E INDEX GENERAL INFORMATION 1 SPECIFICATIONS 2 SPEC PERIODIC INSPECTION AND ADJUSTMENT 3 FUEL SYSTEM 4 FUEL POWER UNIT 5 POWR LOWER UNIT 6 LOWR BRACKET UNIT 7 BRKT ELECTRICAL SYSTEM 8 ELEC TROUBLE-ANALYSIS 9 GEN INFO INSP ADJ – + TRBL ANLS A30000-0

E 1 2 3 4 5 6 7 8 9 GEN INFO CHAPTER 1 GENERAL INFORMATION IDENTIFICATION.............................................................................................1-1 SERIAL NUMBER .....................................................................................1-1 STARTING SERIAL NUMBERS ...............................................................1-1 SAFETY WHILE WORKING ............................................................................1-2 FIRE PREVENTION ...................................................................................1-2 VENTILATION ...........................................................................................1-2 SELF-PROTECTION ..................................................................................1-2 OILS, GREASES AND SEALING FLUIDS ................................................1-2 GOOD WORKING PRACTICES ................................................................1-3 DISASSEMBLY AND ASSEMBLY ...........................................................1-4 SPECIAL TOOLS .............................................................................................1-5 MEASURING ............................................................................................1-5 REMOVAL AND INSTALLATION.............................................................1-7

1-1 GEN INFO E IDENTIFICATION A60000-1* IDENTIFICATION SERIAL NUMBER The outboard motor serial number is stamped on a label attached to the port clamp bracket. 1 Model name 2 Approved model code 3 Transom height 4 Serial number STARTING SERIAL NUMBERS The starting serial number blocks are as fol- lows: Model name Approval model code Starting serial No. F25MH 65W S: 1008911 ~ L: 1008911 ~ F25EH S: 1008911 ~ L: 1008911 ~ F25ER S: 1008911 ~ L: 1008911 ~ F25TR L: 1008911 ~ T25TR L: 1008911 ~

1-2 GEN INFO E SAFETY WHILE WORKING SAFETY WHILE WORKING The procedures given in this manual are those recommended by Yamaha to be fol- lowed by Yamaha dealers and their mechanics. FIRE PREVENTION Gasoline (petrol) is highly flammable. Petroleum vapor is explosive if ignited. Do not smoke while handling gasoline and keep it away from heat, sparks and open flames. VENTILATION Petroleum vapor is heavier than air and is deadly if inhaled in large quantities. Engine exhaust gases are harmful to breathe. When test-running an engine indoors, maintain good ventilation. SELF-PROTECTION Protect your eyes with suitable safety glasses or safety goggles, when grinding or when doing any operation which may cause particles to fly off. Protect hands and feet by wearing safety gloves or protective shoes if appropriate to the work you are doing. OILS, GREASES AND SEALING FLUIDS Use only genuine Yamaha oils, greases and sealing fluids or those recommended by Yamaha.

2003 Yamaha F25 HP outboard service repair manual

You're Reading a Preview

Recently Viewed