top of page

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

350 MPI Alpha 300HP

$16,434.00Price
    bottom of page