Thanks to it's size and power this is the ideal replacement engine for 350 MAG, 7.4L, and 7.4L MPI 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
350 / 261
Maximum RPM (WOT)
4800 - 5200
Engine type
V-8 Remanufactured Iron Marine Block
Displacement (CID/L)
383 / 6.3
Bore and stroke
4.03 x 3.75" / 102 x 95 mm
Compression ratio
9.0:1
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 Bravo with Sea Water Pump
Accessory drive system
Serpentine belt
Lubrication system
High Flow 100 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 Forged 4340 Steel Crankshaft
Rocker arms
1.6:1 Roller Tip 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