Re: 7.5hp Cranks OMC

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September 21, 2015 at 7:51 pm #24333
Don
Participant

    US Member
    quote Chris_P:

    Aha, not sure how I missed that! Thanks Don! That works out just great for me.

    Assuming that the crank in this parts motor is ok. Has a big ole hole in the block from where she tossed a rod.

    I have a few 7.5hp blocks like that. Too bad.

    So, your donor motor has a thrown rod? Unfortunately, the donor’s crank probably isn’t much good either.
    The rod bushings are definitely the weak link on these engines. Could be a messed up lower seal allowing water into the crankcase causing a slow death. Perhaps the previous owner followed the advice about "…..you can mix at 50:1 with today’s better oils….".