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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).