Mercury 3-275 HP Outboard Service and Repair Manual, (1990-1993) B722
This Clymer manual covers more than 25 Mercury outboard motors ranging from 3 HP to -275 HP.
Clymer Marine and PWC manuals are the #1 source for DIY maintenance, troubleshooting and repair. With step-by-step procedures combined with detailed photography and extensive use of exploded parts views, Clymer manuals are a must-have tool for the do-it-yourselfer.
Models:
Mercury 3 HP (1990-1993)
Mercury 3.3 HP (1990-1993)
Mercury 4 HP (1990-1993)
Mercury 5 HP (1990-1993)
Mercury 8 HP (1990-1993)
Mercury 9.9 HP (1990-1993)
Mercury 15 HP (1990-1993)
Mercury 20 HP (1990-1993)
Mercury 25 HP (1990-1993)
Mercury 40 HP (1990-1993)
Mercury 50 HP (1990-1993)
Mercury 60 HP (1990-1993)
Mercury 75 HP (1990-1993)
Mercury 90 HP (1990-1993)
Mercury 100 HP (1990-1993)
Mercury 115 HP (1990-1993)
Mercury 135 HP (1990-1993)
Mercury 150 HP (1990-1993)
Mercury 150XR4 (1990-1993)
Mercury 150XR6 (1990-1993)
Mercury 150XRi (1990-1993)
Mercury 175 HP (1990-1993)
Mercury 175XRi (1990-1993)
Mercury 200 HP (1990-1993)
Mercury 200XRi (1990-1993)
Mercury 250 HP (1990-1993)
This Mercury manual is 640 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 / Propeller / Specifications
CHAPTER TWO / TOOLS AND TECHNIQUES
Safety first / Basic hand tools / Test equipment / Service hints / Special tips / Mechanic’s techniques / Specifications
CHAPTER THREE / TROUBLESHOOTING
Operating requirements / Starting system / Charging system / Ignition system / Breaker-point ignition troubleshooting (1990-1992 3 hp models) / Capacitor discharge ignition (CDI) / Direct voltage tests / Resistance test / Speed limiter / Spark advance/idle stabilizer module troubleshooting / Fuel system / Engine / Specifications
CHAPTER FOUR / LUBRICATION, MAINTENANCE AND TUNE-UP
Lubrication / Proper fuel selection / Recommended fuel mixture / Fuel mixing procedure / AutoBlend II injection system / Constant ratio oil injection / Variable ratio injection system / Lower drive unit lubricant change / Propeller shaft lube / Saltwater corrosion of gear housing bearing carrier and nut / Storage / Anti-corrosion maintenance / Complete submersion / Flushing the cooling system / Tune-up / Compression test / Spark plug plugs / Lower unit and water pump check / Fuel system service / Fuel line and hoses service / Fuel filter service / Fuel pump (all models except fuel-injected models) / Fuel pressure test / Battery and starter check / Starter solenoid check / Alternator and rectifier check / Ignition timing, synchronization and adjustment / On-boat performance test / Specifications
CHAPTER FIVE / TIMING, SYNCHRONIZING AND ADJUSTING
Ignition timing and synchronization / 3 hp models / 3 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 / 150Xri, 175Xri and 200Xri (EFI) models / Specifications
CHAPTER SIX / FUEL SYSTEM
Fuel pump / Carburetors / Throttle plunger carburetor (3 and 3.3 hp models) / Integral fuel pump carburetor (4 and 5 hp models) / Integral fuel pump carburetor (8-25 hp models) / WMA carburetor (40 hp models) / MerCarb center bowl carburetor (50 and 50 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 hp 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 / Specifications
CHAPTER SEVEN / IGNITION AND ELECTRICAL SYSTEMS
Battery / Battery charging system / Starting system / Magneto breaker point ignition / Capacitor discharge ignition (CDI) (1993 3.3 hp models) / Capacitor discharge ignition (CDI) (4-275 hp models) / Specifications
CHAPTER EIGHT / POWER HEAD
Engine serial number / Gaskets and sealants / Fasteners and torque / Power head / Specifications
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 / Pinion depth/gear backlash / Propeller / Trim tab adjustment / Specifications
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 / Specifications
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 [serial No. D000750-on] hp models) / Injection system service / Variable-ratio oil injection (75-115 hp models) / Warning horn system / Injection system service / Variable-ratio oil injection (V6 models) / Warning hose system / Injection system service / Specifications
CHAPTER TWELVE / MANUAL REWIND STARTERS
3 and 3.3 hp models / 4 and 5 hp models / 8, 9.9, 15, 20 and 25 hp models / 40 hp models / Specifications
INDEX
WIRING DIAGRAMS
