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 1990-1993 Mariner 100 HP
1990-1993 Mariner 115 HP
1990-1993 Mariner 135 HP
1990-1993 Mariner 15 HP
1990-1993 Mariner 150 HP
1990-1993 Mariner 150 Magnum EFI
1990-1993 Mariner 150 Magnum II
1990-1993 Mariner 150 Magnum III
1990-1993 Mariner 175 HP
1990-1993 Mariner 175 Magnum EFI
1990-1993 Mariner 2.5 HP
1990-1993 Mariner 20 HP
1990-1993 Mariner 200 HP
1990-1993 Mariner 200 Magnum EFI
1990-1993 Mariner 25 HP
1990-1993 Mariner 250 HP
1990-1993 Mariner 275 HP
1990-1993 Mariner 3.3 HP
1990-1993 Mariner 4 HP
1990-1993 Mariner 40 HP
1990-1993 Mariner 5 HP
1990-1993 Mariner 50 HP
1990-1993 Mariner 60 HP
1990-1993 Mariner 75 HP
1990-1993 Mariner 8 HP
1990-1993 Mariner 9.9 HP
1990-1993 Mariner 90 HP
Part Number Variations B715
B-715
156-B715
6207279
