Mariner 2.5 - 275 HP Outboards, 1990-1993
Part #: B715

640 pages

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 troubleshooting (1990-1992 2.5 hp models) / Capacitor discharge ignition (CDI) / Direct voltage test / Resistance test / Speed limiter / Spark advance/idle stabilizer module troubleshooting / Fuel system / Engine

CHAPTER FOUR / LUBRICATION, MAINTENANCE AND TUNE-UP
Lubrication / Storage / Anti-corrosion maintenance / Complete submersion / Flushing the cooling system / Tune-up

CHAPTER FIVE / TIMING, SYNCHRONIZING AND ADJUSTING
Ignition timing and synchronization / 2.5 hp models (prior to serial No. D90217) / 4 and 5 hp models / 8, 9.9 and 15 hp models / 20 and 25 hp models / 40 hp models / 50 and 60 hp models (prior to serial No. D000750) / 50 and 60 hp models (serial No. D000750-on) / 75 and 90 hp models / 100 and 115 hp models / 135-200 hp (except EFI) models / 250 and 275 hp models / 150, 175 and 200 EFI models

CHAPTER SIX / FUEL SYSTEM
Fuel pump / Carburetor / Throttle plunger carburetor (2.5 and 3.3 hp models) / Integral fuel pump carburetor (4 and 5 hp models) / Integral fuel pump carburetor with primer system (8-25 hp models) / WMA carburetor (40 hp models) / MerCarb center bowl carburetor (50 and 60 hp models prior to serial No. D000750) / WME carburetor (50 and 60 hp serial No. D000750-on, 75, 90, 100 and 115 hp models) / WMH carburetor (135-200 hp models) / MerCarb center bowl carburetor (250 and 275 models) / Thermal air valve (135-200 hp models) / Enrichment valve and choke solenoid systems / Anti-siphon devices / Fuel filter / Fuel tank / Fuel hose and primer bulb / Electronic fuel injection (EFI) / Fuel management tests

CHAPTER SEVEN / IGNITION AND ELECTRICAL SYSTEMS
Battery / Battery charging system / Starting system / Magneto breaker point ignition / Capacitor discharge ignition (CDI) (1993 [serial No. D901217-on] 2.5 and 3.3 hp models) / Capacitor discharge ignition (CDI) (4-275 hp models)

CHAPTER EIGHT / POWER HEAD
Engine serial number / Gaskets and sealants / Fasteners and torque / Power head

CHAPTER NINE / LOWER UNIT GEAR HOUSING
Service precautions / Gear housing / Water pump / Bearing carrier and propeller shaft / Pinion gear, drive shaft and forward gear / Lower shift shaft, bushing and cam / Propeller / Trim tab adjustment

CHAPTER TEN / POWER TRIM AND TILT SYSTEM
Manual tilt assist system / One-ram integral power trim system (40-60 hp models) / Three-ram integral power trim system (75-200 hp models) / One-ram Oildyne power trim system (250-275 hp models) / Power trim assembly removal/installation / Power trim motor and pump assembly removal/installation

CHAPTER ELEVEN / OIL INJECTION SYSTEM
AutoBlend II (50 and 60 hp prior to serial No. D000750) / Constant-ratio oil injection (40 hp and 50-60 hp models [serial No. D000750-on]) / Injection system service / Variable-ratio oil injection (75-115 hp models) / Warning horn system / Injection system service / Variable-ratio oil injection (V6 models) / Warning horn system / Injection system service

CHAPTER TWELVE / MANUAL REWIND STARTERS
2.5 and 3.3 hp models / 4 and 5 hp models / 8, 9.9, 15, 20 and 25 hp models / 40 hp models

INDEX

WIRING DIAGRAMS

Models covered:
1990 1991 1992 1993 MARINER 100 HP
1990 1991 1992 1993 MARINER 115 HP
1990 1991 1992 1993 MARINER 135 HP
1990 1991 1992 1993 MARINER 15 HP
1990 1991 1992 1993 MARINER 150 HP
1990 1991 1992 1993 MARINER 150 MAGNUM EFI
1990 1991 1992 1993 MARINER 150 MAGNUM II
1990 1991 1992 1993 MARINER 150 MAGNUM III
1990 1991 1992 1993 MARINER 175 HP
1990 1991 1992 1993 MARINER 175 MAGNUM EFI
1990 1991 1992 1993 MARINER 2.5 HP
1990 1991 1992 1993 MARINER 20 HP
1990 1991 1992 1993 MARINER 200 HP
1990 1991 1992 1993 MARINER 200 MAGNUM EFI
1990 1991 1992 1993 MARINER 25 HP
1990 1991 1992 1993 MARINER 250 HP
1990 1991 1992 1993 MARINER 275 HP
1990 1991 1992 1993 MARINER 3.3 HP
1990 1991 1992 1993 MARINER 4 HP
1990 1991 1992 1993 MARINER 40 HP
1990 1991 1992 1993 MARINER 5 HP
1990 1991 1992 1993 MARINER 50 HP
1990 1991 1992 1993 MARINER 60 HP
1990 1991 1992 1993 MARINER 75 HP
1990 1991 1992 1993 MARINER 8 HP
1990 1991 1992 1993 MARINER 9.9 HP
1990 1991 1992 1993 MARINER 90 HP

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