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1984-1990 Yamaha 2 hp-250 hp outboard engine service manual Preview image 1
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1984-1990 Yamaha 2 hp-250 hp outboard engine service manual

Models covered in this manual:

  • 2 hp, 1 cyl (43cc), 2-stroke
  • 2 hp, 1 cyl (50cc), 2-stroke
  • 3 hp, 1 cyl (70cc), 2-stroke
  • 3 hp, 1 cyl (70cc), 2-stroke
  • 4 hp, 1 cyl (83cc), 2-stroke
  • 4 hp, 1 cyl (103cc), 2-stroke
  • 5 hp, 1 cyl (103cc), 2-stroke
  • 6 hp, 2 cyl (165cc), 2-stroke
  • 225 hp, 76 deg. V6 (3130cc), 2-stroke
  • 225 hp, 90 deg. V6 (2596cc), 2-stroke
  • 250 hp, V6 (3130cc), 2-stroke
  • Yamaha 2 hp (2MSHU)
  • Yamaha 2.5 hp (2.5MSHU)
  • Yamaha 3 hp (3MSHU)
  • Yamaha 4 hp (4MSHU)
  • Yamaha 50 hp (50ESD)

Production/model years: 1984, 1985, 1986, 1987, 1988, 1989, 1990

File specifications

File size: 232.94 MB
File type: PDF
Language: English

Printable: Yes
Estimated download time: 4.77 Minutes
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Product Information

Table of Contents

1. General Information, Safety and Tools

  • How to Use This Manual
  • Safety First!
  • Boating Tools - Not Required
  • Tools and Equipment
  • Maintenance Fundamentals
  • Fasteners, Measurement, and Conversions
  • Specifications

2. Maintenance and Tune-Up

  • General Information
  • Maintenance
  • Tune-Up
  • Engine Synchronization
  • Yamaha LIT System
  • Yamaha Customer Support Motor Specifications

3. Fuel System

  • Fuel and Combustion Basics
  • Carburetion
  • Carburetor Adjustment
  • Carburetor Overhaul
  • Fuel Pump
  • Fuel Injection
  • Remote Fuel Tank Motor Specifications

4. Ignition and Electrical

  • General Information and Troubleshooting
  • Ignition System
  • Battery Ignition System (Battery Points)
  • Battery Ignition System (CDI)
  • CDI Ignition System
  • Magneto Ignition System
  • Lighting Coil
  • Charging Coil
  • Motor Specifications

5. Lubrication and Cooling

  • Oil Injection System Description
  • Oil Injection System Servicing
  • Oil Injection System Testing
  • Cooling System
  • Specifications

6. Powerhead

  • Powerhead Mechanics
  • Powerhead Rebuilding
  • Cylinder Boring
  • Specifications

7. Lower Unit

  • Lower Unit Mechanics
  • Lower Unit Removal
  • Lower Unit Overhaul
  • Jet Drive

8. Trim and Tilt

  • Hydro Tilt Lock System
  • Power Trim and Tilt System
  • Power Trim System
  • Tilt Lock System

9. Remote Control

  • Remote Controls

10. Hand Rewind Starter

  • Hand Rewind Starter

Master Index

  • Master Index

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