
357 Alpha 4V 275HP
Call (305) 826-2202 for Pricing & Availability
Don't just repower--power up! The world famous 357 Alpha will breathe new life into your runabout, sport boat, or pontoon boat when replacing a 4.3L, 5.0L, or 5.7L engine.
- V-8 Remanufactured Iron Marine Block
- 1-Year Factory Backed Limited Warranty
- 2 Years of Mercury Product Protection Coverage Available
Power | 275 HP (205 kW) |
Full Throttle Range | 4400-4800 RPM |
Displacement | 357 CID (5.8L) |
Engine Type | Remanufactured GM V8 Marine Iron Block & Gen+ Heads |
Bore & Stroke | 4.040" x 3.480" (103mm x 88mm) |
Compression Ratio | 9.4:1 with Hypereutectic Pistons |
Rocker Arm Ratio | 1.5:1 |
Fuel Requirement | 87 Octane (R+M)/2 |
Fuel System | Weber 750 cfm 4V Electric Choke Carburetor & Mechanical Fuel Pump |
Induction System | Dual Plane Aluminum Intake Manifold with Bronze Inserts |
Ignition System | Thunderbolt V with Knock Control |
Charging System | 65 Amp / 917 Watt Alternator |
Water Drain System | Multi-Point Drain - Hand Removable Blue Drain Plugs |
Exhaust System | 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 / High Altitude 1:81:1 |
Dimensions (LxWxH) | 32" x 30" x 22" (814mm x 740mm x 559mm) |
Engine Weight (lbs./kg) | 871 / 395 |
Optional Fresh Water Cooling | Dealer Installed Kit |
Boat Harness Type | 10-pin |
*Requires addition of Seawater pump kit if used with Gen I Alpha Drive