357 Horizon Inboard

310 Crankshaft Horsepower

385 Performance Tuned
  • The ideal repower for your inboard cruiser up to 34'. A quality fuel injected inboard engine to replace any make of 5.7L, 6.0L, 6.2L or 7.4L.
  • Standard V-Drive available for All installations
  • 3-Year Factory Backed Limited Warranty

1-Year Factory Warranty

Available when purchased through any Mercury/MerCruiser authorized dealer

2 Additional Years of Coverage

Available from Mercury Product Protection



Part Number 8M0064805 Inline - 8M0076188 V-Drive
Horsepower @ flywheel 310
Kilowatts @ flywheel 231
Maximum RPM (WOT) 4400-4800
Cylinders Remanufactured 5.7L GM V-8 Marine Iron Block & Vortec Heads
Displacement (CID/L) 357 / 5.8
Bore & Stroke (in/mm) 4.04 x 3.48in
103 x 88mm
Compression Ratio 9.4:1
Fuel / Ethanol Tolerance 87 octane / up to 10% ethanol
Engine Control System Crank Fired High Voltage Switch with Knock Control
Fuel Delivery System MPI with Gen II Cool Fuel
Induction System 2-piece Long Runner Intake with 75mm Throttle Body
Charging alternator amp 65
Charging alternator watt 917
Water drain system Single Point Air-Actuated Water Drain with Flush Port
Exhaust System Iron Manifold with Dry-Joint Exhaust Manifold
Cooling System Full Closed Cooled System--Manifolds Included
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
Cranktrain Powder Metal Rods and Nodular Iron Crankshaft
Rocker Arms 1.6:1 Full Roller
Length (in/mm) 40in / 1092mm
Width (in/mm) 30in / 740mm
Height (in/mm) 22in / 559mm
Weight (lbs/kg) 980lbs / 444kg

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