MerCruiser Plus Series 4.3 4V Alpha Engine Motor 225 HP 8m0178620 Part 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