4.3L Alpha 4V 225HP


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30.00 (in)
22.00 (in)
28.00 (in)
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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.

  • Cast Hypereutectic Alloy Pistons
  • 1-Year Factory Backed Limited Warranty
  • 2 Years of Mercury Product Protection Coverage Available


Power 225 HP (168 kW)
Full Throttle Range 4400-4800 RPM
Displacement CID 265 (4.3L)
Engine Type Remanufactured GM V6 Marine Iron Block & Gen+ Heads
Bore & Stroke 4.030" x 3.480" (102mm x 88mm)
Compression Ratio 9.4:1 with Cast Alloy Pistons
Rocker Arm Ratio 1.5:1 Full Roller Steel
Pistons Cast Hypereutectic Alloy w/Teflon Coated Skirt
Cranktrain Powder Metal Rods and Nodular Iron Crankshaft
Fuel Requirement 87 Octane (R+M)/2
Fuel System Weber 600 cfm 4V Electric Choke Carburetor & Electric Fuel Pump
Induction System Dual Plane Iron Intake Manifold
Ignition System Thunderbolt V
Charging System 65 Amp / 917 Watt Alternator
Water Drain System Multi-Point Drain - Hand Removable Blue Drain Plugs
Exhaust System 2-Piece Exhaust - Iron Manifold with Wet-Joint Exhaust Elbow
Cooling System Thermostatically Controlled Raw Water - 160 F
Accessory Drive System Serpentine Belt
Lubrication System High Flow Oil Pump
Reccomended Engine Oil SAE 25-40 NMMA Certified FC-W Synthetic Blend
Audio Warning System Oil Pressure, Coolant Temperature, Drive Lube
Alpha Ratios 1.47:1, 1.62:1, 1.81:1
Dimensions (LxWxH) 28" x 30" x 22" (696mm x 740mm x 559mm)
Engine Weight (lbs./kg) 784 / 356
Optional Fresh Water Cooling Dealer Installed Kit
Boat Harness Type 10-pin