5.7L Marine Long Block Engines for Sale

New and Remanufactured Longblock……(Pricing)

Help me find my Serial Number or Block Casting Number (Read More)

Let PPT help you buy your next 5.7L 350 Mercruiser Marine Engine online. The following 350 Longbllck Engine specifications and specific engine model characteristics will help you identify the correct 350 motor for your Mercruiser, Volvo Penta, Crusader or PCM boating application. PPT is the technical repowering expert and would be happy to help you get the job done right the first time.

Replacing your 1967-1985 5.7L (select this link to buy your new 1967-1985 model 350 longblock in the webstore store)

The 5.7L 350 cid GM marine engines have been used in the marine industry since 1967. These Marine Longblocks can be easily distinguished in that they have a 12 bolt pattern Marine Engine intake manifold, 2 piece rear main seal, and a mechanical fuel pump pad. The engine is rated at 260 hp.Opposite Rotation Engine….(Read More)

Replacing your 1986-1995 5.7L (select this link to buy your new 1987-1995 model 350 longblock in the webstore store) 

The 1986-1995 5.7L engine is a 1 piece rear main seal marine engines as compared to the 2 piece of the pre-1986 5.7L, and also has a roller camshaft. The intake is still a 12 bolt pattern and has a fuel pump pad for a mechanical fuel pump. The center 2 intake fasteners differ from the pre-1986 engines in that these are not angled at 45 degrees as the other 10 fasteners. These center 2 fasteners are in nearly a vertical position as they have to clear the exhaust crossover in the manifold. The pre-1986 intakes have all 12 fasteners at 45 degrees. The engine is rated at 270 hp.

Replacing your 1996 and up 5.7L (Vortec) (select this link to buy your new 1996 & Newer model 350 longblock in the webstore store) 

The latest marine 5.7L engine is a 1 piece rear main seal. The easiest way to distinguish this engine is that is has a 8 bolt pattern intake manifold and uses a electric fuel pump. The engine has the “Vortec” style heads. The engine is rated at 300 hp.

Partial Engine Packages (Longblock + Carburetor + Ignition)