Mercury 3-275 HP Outboards 1990-1993 - General Info/Tools & Techniques

Mercury 3 - 275 hp outboards, 1990-1993. Part #: b722. 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 / propeller. 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 3 hp models) / capacitor discharge ignition (cdi) / direct voltage tests / 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 / 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 number d000750) / 50 and 60 hp models (serial number 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. 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 number d000750) / wme carburetor (50 and 60 hp serial number 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. 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) 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 / pinion depth/gear backlash / 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. Auto blend ii (50 and 60 hp prior to serial number d000750) / constant ratio oil injection (40 hp and 50-60 [serial number 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. 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. Index. Wiring diagrams. Models covered: 1990 1991 1992 1993 mercury 100 hp1990 1991 1992 1993 mercury 115 hp1990 1991 1992 1993 mercury 135 hp1990 1991 1992 1993 mercury 15 hp1990 1991 1992 1993 mercury 150 hp1990 1991 1992 1993 mercury 150xr41990 1991 1992 1993 mercury 150xr61990 1991 1992 1993 mercury 150xri1990 1991 1992 1993 mercury 175 hp1990 1991 1992 1993 mercury 175xri1990 1991 1992 1993 mercury 20 hp1990 1991 1992 1993 mercury 200 hp1990 1991 1992 1993 mercury 200xri1990 1991 1992 1993 mercury 25 hp1990 1991 1992 1993 mercury 250 hp1990 1991 1992 1993 mercury 275 hp1990 1991 1992 1993 mercury 3 hp1990 1991 1992 1993 mercury 3.3 hp1990 1991 1992 1993 mercury 4 hp1990 1991 1992 1993 mercury 40 hp1990 1991 1992 1993 mercury 5 hp1990 1991 1992 1993 mercury 50 hp1990 1991 1992 1993 mercury 60 hp1990 1991 1992 1993 mercury 75 hp1990 1991 1992 1993 mercury 8 hp1990 1991 1992 1993 mercury 9.9 hp1990 1991 1992 1993 mercury 90 hp. Manufacturer: clymer.