Marine Long Block Engines, Marine Longblocks, New 350 5.7 Marine Long Block Engines and Rebuilt Mercruiser Long Blocks

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Marine Engines Repower – Bayliner Cierra 2655, 1991 model Mercruser MCM 5.0l LX
Dennis, Thanks for your inquiry and the opportunity at earning your business. Since Mercruiser made both Alpha and Bravo sterndrive models with that engine I would not be able to tell you without knowing which one your engine is setup for. Can you give me the original engine serial number? Or can you tell me if [...]

4.3L Marine Engine Longblock Performance Specification
Mike, Thanks for your inquiry and the opportunity at earning your business. The Hp rating for longblocks is determined by the fuel system that’s install back onto the engine. For example since GM only produced one marine version of the 4.3L during this timeframe Mercruiser used this same longblock on their 190 Hp 2 barrel carb [...]

Marine Engines – Replacement marine engine for my boat 5.7 mercruiser 1992 #0d763634
Marty, Thanks for your inquiry and the opportunity at earning your business. Using the links below you can review your options. Let me know if you need any further technical information or help placing your order. In either case I will be glad to assist! Link to Block Code/Serial Number Location http://www.perfprotech.com/store/app_themes/PPT/images/block-casting-no.jpg Link to Remanufactured Longblocks http://tinyurl.com/68kcet8 Link to Remanufacturing [...]

Suzuki Marine Outboard Motors – Replacing a Fuel Pump on a DF70
Step by Step Video Instructions illustrating how to change an electric fuel pump on a Suzuki DF70 outboard motor. Watch Video

Boat Trailer Parts and Accessories – How to Replace a Boat Trailer Hub
Step by Step video instructions illustrating how to replace a leaky oil filled hub on a boat trailer. Watch Video

Replacing your 5.7L Longblock

Marine Long Block Engines, Marine Longblocks, New 350 5.7 Marine Long Block Engines and Rebuilt Mercruiser Long Blocks

Marine Long Block Engines, Marine Longblocks, New 350 5.7 Marine Long Block Engines and Rebuilt Mercruiser Long Blocks

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

Replacing your 1967-1985 5.7L

The 5.7L 350 cid GM marine engine has been used in the marine industry since 1967. The engines can be easily distinguished in that they have a 12 bolt pattern intake manifold, 2 piece rear main seal, and a mechanical fuel pump pad. The engine is rated at 260 hp.

Opposite Rotation Engine

Small V8 Engines

Replacing your 1986-1995 5.7L

The 1986-1995 5.7L engine is a 1 piece rear main seal engine 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)

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.

Vortec Intake Manifold

Partial Engine Packages (Longblock + Carburetor + Ignition)

Technical Tips Information:
Installation Guidelines Overall Re-Powering Options Automotive vs. Marine	3.0L Engines 4.3L Engines 5.0L/5.7L Engines 7.4L/8.2L Engines

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