Mercury Mercruiser Marine - Quicksilver 350 MPI ALPHA (#8M0187359)

The PLUS‑SERIES ENGINES from QUICKSILVER are 100% new construction, and contain all the parts a CRATE ENGINE lacks. These are drop‑in‑ready new marine engines. Based on popular MerCruiser and Mercury Remanufacturing models, these are 100% new engines that are built with marine‑grade engine internals and other NEW marine components. QUICKSILVER PLUS‑SERIES engines are 100% new factory engines for repowering classic boats built before 2008 in California, and prior 2010 for the other 49‑states. Because these are completely new engines and not a major repair assembly, the old engine being replaced is to be returned per EPA 1068.240

Since the focus of PLUS‑SERIES ENGINES is repower, many parts included in new MerCruiser engines used for new boat construction are not included. Parts such as: transoms, trim pumps, Y‑Pipes, rigging, props, boat harnesses, riser kits, closed cooling kits, steering cylinders, lubes, and many other parts required for a successful repower must all be purchased separately.

Adapting Plus Series engines to specific applications may require some parts to be transferred from the engines coming out of the boat or purchased separately.

350 MPI ALPHA – Alpha Engine Only. 300 HP @ 5000 RPM. 350 Cubic Inch Fully Dressed Marine Engine. Engine Features 100% new Quicksilver: Cast Iron Engine Block, Raw Water Cooling with Warm Exhaust Manifolds, Flush System, Special Flame Graphics, Multi‑Port Fuel Injection using Cool fuel II, Dry Joint Exhaust, Roller Camshaft, Quicksilver Cast Iron Cylinder Heads featuring Black‑X Valve Tech, 1.5:1 stamped rocker arms, ECM555, Engine Guardian, SmartCraft Ready, Mechanical Throttle and Shift, and 10‑Pin Harness. Runs on 87 Octane Fuel.

NOTE: If used with an Alpha One (Gen I) drive, this engine requires Seawater Pump Kit 46‑8M0139983 & serpentine belt 57‑865615Q03 (sold separately) for proper cooling.

NOTE: Because this is a completely new engine and not a major repower assembly, the old engine being replaced is to be returned per EPA 1068.240.

300 HP 100% New Quicksilver Sterndrive Engine Replaces: 5.0 EFI, 5.0L MPI, 5.7L EFI, & 350 MPI sterndrive Alpha models. "For Europe, this engine is not allowed for recreational usage, please request your customer service to sign an exemption form ‑ see page n"

8M0187359 replaced 8M0136293 (supersession)

350 MPI ALPHA 8M0187359 Spec Sheet Below (click the image to view full size image - opens in new tab)

QuickSilver Product Video of this engine linked below

Mercury Assemblies