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.
Dry-Joint Exhaust
1-Year Factory Backed Limited Warranty
2 Years of Mercury Product Protection Coverage available
 
HP / kW @ flywheel
300 / 224
Maximum RPM (WOT)
4600 - 5000
Engine type
V-8 Remanufactured Iron Marine Block
Displacement (CID/L)
355 / 5.8
Bore and stroke
4.03 x 3.48" / 103 x 88 mm
Compression ratio
9.4:1
Fuel ethanol tolerance
Up to 10%
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)
Air induction
Two-piece long runner intake with 75 mm throttle body (80 mm w/DTS)
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 Alpha
Accessory drive system
Serpentine belt
Lubrication system
High Flow 60 psi 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 Stamped Steel
Dimensions (L x W x H)
32 x 30 x 22" / 814 x 740 x 559 mm
Weight (engine only)
932 lbs / 423 kg