Yamaha Two-Stroke Outboard 50HP (1984 - 1989) Clymer

This Yamaha marine manual is 464 pages.

QUICK REFERENCE DATA

CHAPTER ONE / GENERAL INFORMATION
Manual organization / Notes, cautions and warnings / Torque specifications / Engine operation / Fasteners / Lubricants / Gasket sealant / Galvanic corrosion / Protection from galvanic corrosion / Propellers

CHAPTER TWO / TOOLS AND TECHNIQUES
Safety first / Basic hand tools / Test equipment / Service hints / Special tips / Mechanic's techniques

CHAPTER THREE / TROUBLESHOOTING
Operating requirements / Starting system / Charging system / Ignition system / Component testing / Breaker point ignition system / CDI ignition testing / Fuel system / Engine temperature and overheating / Engine

CHAPTER FOUR / LUBRICATION, MAINTENANCE AND TUNE-UP
Lubrication / Fuel selection / Recommended fuel/oil mixing ratio / Correct fuel mix / Consistent fuel mixtures / Gearcase lubrication / Gearcase lubricant check / Gearcase lubricant change / Jet drive bearing lubrication / Salt water corrosion of gearcase bearing housing and cap / Storage / Anti-corrosion maintenance / Complete submersion / Engine flushing (gearcase models) / Engine flushing (jet drive models) / Tune-up / Compression check / Spark plug service / Water pump check / Fuel system service / Fuel lines / Engine fuel filter service / Fuel pump / Fuel pump pressure test / Breaker point ignition system service / Breaker point replacement / Breaker point adjustment / Battery and starter motor check (electric start models only) / Starter relay test (electric start models only) / Choke solenoid resistance check (electric start models only) / Engine synchronization and adjustment / On-boat performance test / Specifications

CHAPTER FIVE / TIMING, SYNCHRONIZING AND ADJUSTING
Engine timing and synchronization / Yamaha 2 / Yamaha 3, 4 and 5 / Yamaha 6 and 8 / Yamaha 9.9 and 15 / Yamaha 25 (1984-1987) / Yamaha 25 (1988-on) / Yamaha 30 (1984-1986) / Yamaha 30 (1987-on) / Yamaha 40 and 50 (1984-1988) / Yamaha 40 and 50 (1989) / Yamaha 70 / Yamaha 90 / Yamaha 115 and 130 / Yamaha 150, 175, 200, 220 and 225 / Specifications

CHAPTER SIX / FUEL SYSTEM
Fuel pump / Carburetors / Throttle plunger carburetor / Integral fuel pump carburetor / Center bowl carburetor / V4/V6 carburetor / Fuel filter / Reed valve assembly / Portable fuel tank / Fuel line and primer bulb / Anti-siphon devices / Specifications

CHAPTER SEVEN / IGNITION AND ELECTRICAL SYSTEMS
Battery / Battery charging system / Electric starting system / Ignition systems / Magneto breaker point ignition / Yamaha 3-70 hp CDI (Capacitor discharge ignition) / Yamaha 90-200 hp CDI (Capacitor discharge ignition) / Yamaha micro-computer ignition (YMIS) / Specifications

CHAPTER EIGHT / POWER HEAD
Fasteners and torque / Engine serial number / Gaskets and sealants / Flywheel / Power head removal/installation / Power head disassembly / Crankshaft assembly and cylinder block / Power head assembly / Specifications

CHAPTER NINE / GEARCASE AND DRIVE SHAFT HOUSING
Service precautions / Propeller / Water pump / Gearcase / Bearing carrier and propeller shaft / Pinion gear, drive shaft and shift rod / Shift rod/shaft / Forward gear and bearing assembly / Gearcase housing / Pinion gear depth and gear backlash / Trim tab and anode / Pressure and vacuum test / Specifications

CHAPTER TEN / JET DRIVES
Maintenance / Water pump / Jet drive / Bearing housing / Intake housing liner / Specifications

CHAPTER ELEVEN / AUTOMATIC REWIND STARTER

CHAPTER TWELVE / POWER TRIM AND TILT SYSTEMS
Power tilt system / Power trim/tilt system / Specifications

CHAPTER THIRTEEN / OIL INJECTION SYSTEM
System components / Operation / Oil level warning system / Injection system service / Component replacement / Specifications

CHAPTER FOURTEEN / YAMAHA 703 REMOTE CONTROL BOX

INDEX

WIRING DIAGRAMS

Models Covered:
1984 1985 1986 1987 1988 1989 Yamaha 115 HP
1987 1988 1989 Yamaha 115 HP Jet
1988 1989 Yamaha 130 HP
1984 1985 1986 1987 1988 1989 Yamaha 15 HP
1984 1985 1986 1987 1988 1989 Yamaha 150 HP
1984 1985 1986 1987 1988 1989 Yamaha 175 HP
1984 1985 1986 1987 1988 1989 Yamaha 2 HP
1984 1985 1986 1987 1988 1989 Yamaha 200 HP
1986 1987 1989 Yamaha 200 HP Jet
1984 1985 1986 Yamaha 220 HP
1987 1986 1989 Yamaha 225 HP 90 degree V6
1984 1985 1986 1987 1988 1989 Yamaha 25 HP
1988 1989 Yamaha 3 HP
1984 1985 1986 1987 1988 1989 Yamaha 30 HP
1984 1985 1986 1987 1988 1989 Yamaha 4 HP
1984 1985 1986 1987 1988 1989 Yamaha 40 HP 3-Cylinder
1989 Yamaha 40 HP Jet
1984 1985 Yamaha 5 HP
1984 1985 1986 1987 1988 1989 Yamaha 50 HP
1988 1989 Yamaha 50 HP Jet
1984 1985 1986 1987 1988 1989 Yamaha 6 HP
1984 1985 1986 1987 1988 1989 Yamaha 70 HP
1984 1985 1986 1987 1988 1989 Yamaha 8 HP
1984 1985 1986 1987 1988 1989 Yamaha 9.9 HP
1984 1985 1986 1987 1988 1989 Yamaha 90 HP
1987 1989 Yamaha 90 HP Jet
1987 1989 Yamaha Pro 50
1986 1987 1988 1989 Yamaha Pro V 150

Clymer Manuals Yamaha 2 HP Manual
Clymer Manuals Yamaha 3 HP Manual
Clymer Manuals Yamaha 4 HP Manual
Clymer Manuals Yamaha 5 HP Manual
Clymer Manuals Yamaha 6 HP Manual
Clymer Manuals Yamaha 8 HP Manual
Clymer Manuals Yamaha 9.9 HP Manual
Clymer Manuals Yamaha 15 HP Manual
Clymer Manuals Yamaha 25 HP Manual
Clymer Manuals Yamaha 30 HP Manual
Clymer Manuals Yamaha 40 HP 3-Cylinder Manual
Clymer Manuals Yamaha 40 HP Jet Manual
Clymer Manuals Yamaha 50 HP Manual
Clymer Manuals Yamaha 50 HP Jet Manual
Clymer Manuals Yamaha 70 HP Manual
Clymer Manuals Yamaha 90 HP Manual
Clymer Manuals Yamaha 90 HP Jet Manual
Clymer Manuals Yamaha 115 HP Manual
Clymer Manuals Yamaha 115 HP Jet Manual
Clymer Manuals Yamaha 130 HP Manual
Clymer Manuals Yamaha 150 HP Manual
Clymer Manuals Yamaha 175 HP Manual
Clymer Manuals Yamaha 200 HP Manual
Clymer Manuals Yamaha 200 HP Jet Manual
Clymer Manuals Yamaha 220 HP Manual
Clymer Manuals Yamaha 225 HP 90 degree V6 Manual
Clymer Manuals Yamaha Pro 50 Manual
Clymer Manuals Yamaha Pro V 150 Manual
Clymer Manuals Yamaha 2 HP Online Manual
Clymer Manuals Yamaha 3 HP Online Manual
Clymer Manuals Yamaha 4 HP Online Manual
Clymer Manuals Yamaha 5 HP Online Manual
Clymer Manuals Yamaha 6 HP Online Manual
Clymer Manuals Yamaha 8 HP Online Manual
Clymer Manuals Yamaha 9.9 HP Online Manual
Clymer Manuals Yamaha 15 HP Online Manual
Clymer Manuals Yamaha 25 HP Online Manual
Clymer Manuals Yamaha 30 HP Online Manual
Clymer Manuals Yamaha 40 HP 3-Cylinder Online Manual
Clymer Manuals Yamaha 40 HP Jet Online Manual
Clymer Manuals Yamaha 50 HP Online Manual
Clymer Manuals Yamaha 50 HP Jet Online Manual
Clymer Manuals Yamaha 70 HP Online Manual
Clymer Manuals Yamaha 90 HP Online Manual
Clymer Manuals Yamaha 90 HP Jet Online Manual
Clymer Manuals Yamaha 115 HP Online Manual
Clymer Manuals Yamaha 115 HP Jet Online Manual
Clymer Manuals Yamaha 130 HP Online Manual
Clymer Manuals Yamaha 150 HP Online Manual
Clymer Manuals Yamaha 175 HP Online Manual
Clymer Manuals Yamaha 200 HP Online Manual
Clymer Manuals Yamaha 200 HP Jet Online Manual
Clymer Manuals Yamaha 220 HP Online Manual
Clymer Manuals Yamaha 225 HP 90 degree V6 Online Manual
Clymer Manuals Yamaha Pro 50 Online Manual
Clymer Manuals Yamaha Pro V 150 Online Manual

Yamaha 2 HP 9 (1984-1989)
Yamaha 3 HP (1988-1989)
Yamaha 4 HP (1984-1989)
Yamaha 5 HP (1984-1985)
Yamaha 6 HP (1984-1989)
Yamaha 8 HP (1984-1989)
Yamaha 9.9 HP (1984-1989)
Yamaha 15 HP (1984-1989)
Yamaha 25 HP (1984-1989)
Yamaha 30 HP (1984-1989)
Yamaha 40 HP 3-Cylinder (1984-1989)
Yamaha 40 HP Jet (1989)
Yamaha 50 HP (1984-1989)
Yamaha 50 HP Jet (1988-1989)
Yamaha 70 HP (1984-1989)
Yamaha 90 HP (1984-1989)
Yamaha 90 HP Jet (1987-1989)
Yamaha 115 HP (1984-1989)
Yamaha 115 HP Jet (1987-1989)
Yamaha 130 HP (1988-1989)
Yamaha 150 HP (1984-1989)
Yamaha 175 HP (1984-1989)
Yamaha 200 HP (1984-1989)
Yamaha 200 HP Jet (1986-1989)
Yamaha 220 HP (1984-1986)
Yamaha 225 HP 90 degree V6 (1987-1989)
Yamaha Pro 50 (1987-1989)
Yamaha Pro V 150 (1986-1989)

Does not cover L150 or L200 Counter-Rotation Models.