Yamaha Two-Stroke Outboard 250HP 76 degree V6 (1990 - 1995) Clymer

This Yamaha marine manual is 720 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 / Breaker point ignition testing (1990-1994 2 hp engine) / CDI ignition testing / Fuel enrichment system / Fuel system / Engine temperature and overheating / Power head

CHAPTER FOUR / LUBRICATION, MAINTENANCE AND TUNE-UP
Lubrication / Proper fuel selection / Fuel additive / Water separator filter / Recommended Fuel/oil mixture ratio / Correct fuel mixing / Consistent fuel mixtures/ Gearcase lubricant change / Jet drive lubrication / Saltwater corrosion of the gearcase bearing housing and cap / Storage / Anti-corrosion maintenance / Complete submersion / Engine flushing / Tune-up / Compression check / Spark plugs / Spark plug gap adjustment / Fuel system service / Fuel lines / Engine fuel filter service / Fuel pump service / Fuel pump pressure test / Breaker point ignition 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 / Fuel enrichment solenoid resistance check / Engine synchronization and adjustments / On-boar performance test / Specifications

CHAPTER FIVE / TIMING, SYNCHRONIZATION AND ADJUSTMENT
Engine timing and synchronization / 1990-1994 2 hp models / 1995 2 hp models / 3 hp models / 4 hp and 5 hp models / 6 hp and 8 hp models / 9.9 hp and 15 hp models / C25 models / 25 hp models / C30 (2-cylinder) models / 30 hp (3-cylinder) models / C40 (2-cylinder) models / 40 hp, 50 hp and Pro 50 (3-cylinder) models / C55 models / Pro 60, 70 hp and 90 hp models / C75 hp and C85 models / C115 models / 115 hp, Pro V 115, 130 hp V4, 150 hp, Pro V 150, 175 hp Pro V 175, 200 hp, Pro V 200 and 225 hp 90º V6 models / 225 hp, 250 hp 76º V6 models / Specifications

CHAPTER SIX / FUEL SYSTEM
Fuel system connections / Fuel pump / Prime start system / Carburetors / Throttle plunger carburetor (2 hp) / Integral fuel pump carburetor / Center bowl carburetor (C25) / Center bowl carburetor (C30, C40, C75 and C85) / Center bowl carburetor (C55) / Center bowl carburetor (40, 50, 70 and 90 hp and Pro 50 and Pro 60) / Center bowl carburetor (225, 250 hp 76º V6) / Twin barrel carburetor (115-130 hp V4 and 150-225 hp 90º V6) / Carburetor cleaning and inspection (all models) / Float adjustment / Primer assembly (225 hp 90º V6) / Fuel filter / Reed valve assembly / Integral fuel tank (2-5 hp) / Portable fuel tank (7-250 hp) / Fuel line and primer bulb / Anti-siphon devices / Specifications

CHAPTER SEVEN / IGNITION AND ELECTRICAL SYSTEMS
Electrical connector adapters / Battery / Battery charging system / Electric starting system / Ignition systems / Magneto breaker point ignition (1990-1994 2 hp) / Capacitor discharge ignition (2-55 hp and Pro 50 models) / Capacitor discharge ignition (75-200 hp [except 1992-on 90 hp]) / Yamaha microcomputer ignition system (YMIS) (1992-on Pro 60, 70 hp, 90 hp 3-cylinder and all 225-250 hp V6 models) / 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 and notes / Propeller / Water pump / Gearcase / Gearcase disassembly/inspection/reassembly / Pinion gear and driveshaft / Shift shaft / Forward gear or reverse gear ("L" models) 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 / REWIND STARTERS

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 / Oil injection system service / Component replacement / Specifications

CHAPTER FOURTEEN / YAMAHA 703 REMOTE CONTROL BOX

INDEX

WIRING DIAGRAMS

Models covered: 1990 1991 1992 1993 1994 1995 2-5 HP Single Cylinder 1990 1991 1992 1993 1994 1995 6-55 HP 2-Cylinder 1990 1991 1992 1993 1994 1995 30-90 HP 3-Cylinder 1990 1991 1992 1993 1994 1995 115 & 130 HP V4 1990 1991 1992 1993 1994 1995 150, 175, 200 & 225 HP 90 degree V6 1990 1991 1992 1993 1994 1995 225 & 250 HP 76 degree V6

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Yamaha 2 HP (1990-1995)
Yamaha 3 HP (1990-1995)
Yamaha 4 HP (1990-1995)
Yamaha 5 HP (1990-1995)
Yamaha 6 HP (1990-1995)
Yamaha 8 HP (1990-1995)
Yamaha 9.9 HP (1990-1995)
Yamaha 15 HP (1990-1995)
Yamaha C25 HP (1990-1995)
Yamaha 25 HP (1990-1995)
Yamaha C30 HP (1990-1995)
Yamaha 30 HP (1990-1995)
Yamaha C40 HP (1990-1995)
Yamaha 40 HP (1990-1995)
Yamaha 50 HP (1990-1995)
Yamaha Pro 50 HP (1990-1995)
Yamaha 55 HP (1990-1995)
Yamaha Pro 60 HP (1990-1995)
Yamaha 70 HP (1990-1995)
Yamaha C75 HP (1990-1995)
Yamaha C85 HP (1990-1995)
Yamaha 90 HP (1990-1995)
Yamaha 115 HP (1990-1995)
Yamaha C115 HP (1990-1995)
Yamaha Pro V 115 (1990-1995)
Yamaha 130 HP (1990-1995)
Yamaha L130 (1990-1995)
Yamaha 150 HP (1990-1995)
Yamaha L150 (1990-1995)
Yamaha Pro V 150 (1990-1995)
Yamaha 175 HP (1990-1995)
Yamaha Pro V 175 (1990-1995)
Yamaha 200 HP (1990-1995)
Yamaha L200 (1990-1995)
Yamaha Pro V 200 (1990-1995)
Yamaha 225 HP 90 degree V6 (1990-1995)
Yamaha 225 HP 76 degree V6 (1990-1995)
Yamaha L225 90 degree V6 (1990-1995)
Yamaha 250 HP 76 degree V6 (1990-1995)
Yamaha L250 90 degree V6 (1990-1995)