need to know ground bolt size and threads,and if 2003 225 would have same size ground bolt thanks
need to know ground bolt size and threads,and if 2003 225 would have same size ground bolt thanks
If you are referring to the bolt that holds the Battery NEGATIVE cable to the engine block, that bolt is SS- M8x20 (shouldered head).
More than likely the other engine used the same bolt (pretty standard for 3L Optimax Models, and many of the 3L EFI models, too).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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