Mercury® Remanufacturing
Plus-Series Alpha Sterndrives
A line to repower sterndrive boats with value performance.
Ready to pair up with an Alpha® drive.
4.3L Alpha 4V
225 Crankshaft Horsepower
WOW! A V-6 that makes more power than a 5.0L V-8. Replaces 4.3L- and 5.0L-powered runabouts while delivering V-6 fuel economy.
Owners Manuals
Need an Owner’s Manual for your Mercury engine to perform maintenance, replace parts or just learn more about your engine? Mercury has made it easy for you to purchase a printed copy or to download and print your own copy. To order a printed version of the Service Manual for your particular Mercury Outboard or MerCruiser Engine, click here.
Specifications
Mercury® Remanufacturing: Plus-Series Alpha Sterndrives
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Print Compare With Other ProductsPart number - 863611R11
HP / kW @ flywheel - 300 / 224
Maximum RPM (WOT) - 4600 - 5000
Engine type - V-8 Remanufactured Iron Marine Block
Displacement (CID/L) - 355 / 5.8
Bore and stroke - 4.03 x 3.48" / 103 x 88 mm
Compression ratio - 9.4:1
Fuel ethanol tolerance - Up to 10%
Engine control system - ECM 555 W/Knock Control & Crankshaft Trigger
Fuel delivery system - GEN II Cool Fuel with Boost Pump
Fuel injection system / carburetor type - Multi-point electronic fuel injection (MPI)
Air induction - Two-piece long runner intake with 75 mm throttle body (80 mm w/DTS)
Alternator amp / Watt - 65 amp / 917 watt
Water drain system - Multi-point drain
Exhaust system - Iron manifold with Dry-Joint Exhaust Elbow
Cooling system - 160F Raw Water Alpha
Accessory drive system - Serpentine belt
Lubrication system - High Flow 60 psi Oil Pump
Recommended oil - Mercury MerCruiser Synthetic Blend 25W-40, NMMA Certified FC-W Synthetic Blend
Pistons - Cast Hypereutectic Alloy
Cranktrain - Powder Metal Rods and Nodular Iron Crankshaft
Rocker arms - 1.5:1 Stamped Steel
Dimensions (L x W x H) - 32 x 30 x 22" / 814 x 740 x 559 mm
Weight (engine only) - 932 lbs / 423 kg
Compatible drives (application dependent - contact sales or service) - Alpha 1.47:1
- Alpha 1.81:1
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Print Compare With Other ProductsPart number - 8M0178620
HP / kW @ flywheel - 225 / 168
Maximum RPM (WOT) - 4200 - 4600
Engine type - V-6 Remanufactured Iron Marine Block
Displacement (CID/L) - 265 / 4.3
Bore and stroke - 4.03 x 3.48" / 102 x 88 mm
Compression ratio - 9.4:1
Fuel ethanol tolerance - Up to 10%
Fuel requirement - 87 octane (R+M)/2
Engine control system - EST
Fuel delivery system - 4V carburetor and electric fuel pump
Fuel injection system / carburetor type - 600 cfm Weber 4V with electric choke
Air induction - Dual plane iron intake manifold
Alternator amp / Watt - 65 amp / 917 watt
Water drain system - Multi-point drain
Exhaust system - Electro-deposition paint coated warm iron manifold with wet joint elbow
Cooling system - 160F Raw Water
Accessory drive system - Serpentine belt
Lubrication system - High Flow Oil Pump
Recommended oil - Mercury MerCruiser Synthetic Blend 25W-40, NMMA Certified FC-W Synthetic Blend
Pistons - Cast Hypereutectic Alloy
Cranktrain - Powder Metal Rods and Nodular Iron Crankshaft
Rocker arms - 1.5:1 Full Roller Steel
Dimensions (L x W x H) - 28" x 30" x 22" / 696mm x 740mm x 559 mm
Weight (engine only) - 784 lbs / 356 kg
Compatible drives (application dependent - contact sales or service) - Alpha 1.47:1
- Alpha 1.62:1
- Alpha 1.81:1
Documents
Buy the Books
You can order all available Mercury literature online or through any authorized Mercury dealer. Please have your outboard or sterndrive serial number before placing the order.
- Operation, Maintenance, and Warranty Manuals
- Parts Manual
- Service Manual
Brochures
Installation Drawings
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