Reman Power Performers

357-Alpha 4V

275 Crankshaft Horsepower

Don't just repower--power up! The world famous Alpha drive will breathe new life into your runabout, sport boat or pontoon boat when replacing a 4.3L, 5.0L, or 5.7L.

1-Year Factory Warranty

Available at any Mercury/MerCruiser Authorized Dealer

2 Additional Years of Coverage

Available from Mercury Product Protection

Specifications

Horsepower 275HP @ Crankshaft
WOT Operating Range 4400-4800 RPM
Engine Configuration GM Small Block V-8
Displacement 357 CID / 5.8L
Bore 4.040"
Stroke 3.480"
Compression Ratio 9.4:1
Idle Speed 650 RPM
Gasoline 87 Octane
Engine Oil MerCruiser 25W40 Syn Blend

Marine Configurations

Engine Only  
Engine with Alpha 1.47:1

Standard Equipment

750cfm 4V Weber Carburetor
Thunderbolt V Ignition with Knock Control
New and Improved Stainless Steel Valves
High Flow Flame Arrestor
1.5:1 Rocker Arms
Marine Roller Camshaft
Intake Lift 0.415"
Exhaust Lift 0.428"
Cast Nodular Iron Heads
Intake Valve Diameter 1.94"
Exhaust Valve Diameter 1.50"
Cast Aluminum Pistons
High Flow Oil Pump
160˚ F Thermostat

Trade In. Trade Up. Mercury Remanufacturing.

Download 357-Alpha 4V sell sheet
Download installation drawing

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