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Technical Articles and Specifications

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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

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Locating Your Serial Number

Mercruiser product serial numbers in the following format 0W555555 begin with the number 0 and not the letter O. However the site will automatically correct your input if you accidentally enter an O. Serial numbers that do not follow this format but instead have 7 numerical digits are prior to 1980 and cannot be searched on the Parts Finder. 

Engines: The serial number tag is located near the STARTER, by the flywheel housing; or, on the ROCKER ARM or FLAME ARRESTOR COVER.

Transom plates: The serial number tag is located on the INNER TRANSOM PLATE inside the boat; or, on the UPPER SWIVEL PIN.

Sterndrives: The serial number tag is located on the UPPER DRIVE SHAFT HOUSING (starboard side or on the back of the housing).

Mercruiser Block Casting Number

Serial Number Search Tool

 

mercury Outboard Motor Serial Number Location

Serial Number Search Tool

 

mercury Outboard Motor Serial Number Location

 Serial Number Search Tool

 

The model of Mercruiser engine can be determined by looking at the last letters of the "engine block code" that is stamped in all complete longblocks by General Motors at the time of assembly. If the serial number, and/or model decals are missing, the engine code will help to determine the engine model. Send an email to sales@perfprotech.com and we will be happy to point you at the location of your particluar engine block code stamping.