350 MPI Alpha 300HP

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 Exhaust1-Year Factory Backed Limited Warranty2 Years of Mercury Product Protection Coverage available HP / kW @ flywheel300 / 224Maximum RPM (WOT)4600 – 5000Engine typeV-8 Remanufactured Iron Marine BlockDisplacement (CID/L)355 / 5.8Bore and stroke4.03 x 3.48″ / 103 x 88 mmCompression ratio9.4:1Fuel ethanol toleranceUp to 10%Engine control systemECM 555 W/Knock Control & Crankshaft TriggerFuel delivery systemGEN II Cool Fuel with Boost PumpFuel injection system / carburetor typeMulti-point electronic fuel injection (MPI)Air inductionTwo-piece long runner intake with 75 mm throttle body (80 mm w/DTS)Alternator amp / Watt65 amp / 917 wattWater drain systemMulti-point drainExhaust systemElectro-deposition paint coated warm iron manifold with wet joint elbowCooling system160F Raw Water AlphaAccessory drive systemSerpentine beltLubrication systemHigh Flow 60 psi Oil PumpRecommended oilMercury MerCruiser Synthetic Blend 25W-40, NMMA Certified FC-W Synthetic BlendPistonsCast Hypereutectic AlloyCranktrainPowder Metal Rods and Nodular Iron CrankshaftRocker arms1.5:1 Stamped SteelDimensions (L x W x H)32 x 30 x 22″ / 814 x 740 x 559 mmWeight (engine only)932 lbs / 423 kg