350 MPI Alpha

300 Crankshaft Horsepower

Thanks to its size and power, this is the ideal replacement engine for 5.0L, 5.7L, 5.0 MPI and 5.7 EFI engines that power cruisers, small boats and large runabouts.

1-Year Factory Warranty

Available when purchased through any Mercury/MerCruiser authorized dealer

2 Additional Years of Coverage

Available from Mercury Product Protection

Resources

Specifications

Part Number 863611R11
Horsepower @ flywheel 300
Kilowatts @ flywheel 224
Maximum RPM (WOT) 4600-5000
Cylinders V-8 Remanufactured Iron Marine Block
Displacement (CID/L) 355 / 5.8
Bore & Stroke (in/mm) 4.03 x 3.48in
103 x 88mm
Compression Ratio 9.4:1
Fuel / Ethanol Tolerance 87 octane / up to 10% ethanol
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)
Induction System Two-piece long runner intake with 75mm throttle body
Charging alternator amp 65
Charging alternator watt 917
Water drain system Multi-point drain
Exhaust System Electro-deposition paint coated warm iron manifold with dry joint 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 FC-W rated
Pistons Cast Hypereutectic Alloy
Cranktrain Powder Metal Rods and Nodular Iron Crankshaft
Rocker Arms 1.5:1 Stamped Steel
Length (in/mm) 32in / 814mm
Width (in/mm) 30in / 740mm
Height (in/mm) 22in / 559mm
Weight (lbs/kg) 932lbs / 423kg
Features & Related Products Analog Controls
Analog Gauges
Digital Gauges
Full closed cooling (KIT)
Hydraulic / Power steering
Remote Oil filter
SmartCraft Digital Technology
Compatible Drives (Application Dependant - Contact Sales or Service) Alpha 1.47:1
Alpha 1.81:1

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