Re: Sealer for cylinder head and crankcase gasket

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June 28, 2017 at 10:04 pm #60558
chris-p
Participant

    I know that the 3M 847 is the recommended sealer per the manual, but I am not a big fan of it for crankcase halves.

    For gearcases yes, powerheads no, just my humble opinion.

    It has fillers in it, and is not anaerobic. It hardens and dries before you get the halves closed, causing leaks. Loctite 515 , or better yet, Loctite 518 is ideal. Or as stated, the OMC Gel Seal.