Mercury MerCruiser 350 MPI Alpha 300HP

Description

Thanks to it's 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
Power
300 HP (224 kW)
Full Throttle Range
4600-5000 RPM
Displacement
355 CID (5.8L)
Engine Type
Remanufactured GM V8 Marine Iron Block & Gen+ Heads
Bore & Stroke
4.030" x 3.480" (102mm x 88mm)
Compression Ratio
9.4:1 with Hypereutectic Pistons
Rocker Arm Ratio
1.5:1
Fuel Requirement
87 Octane (R+M)/2
Fuel System
MPI with Gen II Cool Fuel
Induction System
2-piece Long Runner Intake with 75mm Throttle Body
Control System
ECM 555 with SmartCraft CAN Capability
Ignition System
Crank-fired High Voltage Switch w/Knock Control & Platinum Plugs
Charging System
65 Amp / 917 Watt Alternator
Water Drain System
Multi-Point Drain - Hand Removable Blue Drain Plugs
Exhaust System
Iron Manifold with Dry-Joint Exhaust Elbow
Cooling System
Thermostatically Controlled Raw Water - 160 F*
Accessory Drive System
Serpentine Belt
Lubrication System
High Flow Oil Pump
Reccomended Engine Oil
SAE 25-40 NMMA Certified FC-W Synthetic Blend
Audio Warning System
Oil Pressure, Coolant Temperature, Drive Lube, Water Pressure
Alpha Ratios
1.47:1 / High Altitude 1:81:1
Dimensions (LxWxH)
32" x 30" x 22" (814mm x 740mm x 559mm)
Engine Weight (lbs./kg)
932 / 423
Optional Fresh Water Cooling
Dealer Installed Kit
Boat Harness Type
10-pin
*Requires addition of Seawater pump kit if used with Gen I Alpha Drive
All shipping quotes are subject to a 9 increase if the shipping address is a residential one due to the use of the truck's liftgate