Re: Sudden drop in rpm’s

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July 25, 2016 at 10:18 am #40891
Don
Participant

    US Member
    quote BillW:

    Why not just pull the power head and look with a dentist’s mirror?

    Here is a way-out-there idea…..I once had a Mark 5 whose cylinder liner turned in the block casing, cutting the effective port size in half. They are not supposed to turn, as they are cast in. Don’t know if that’s possible on an 18 OMC or not. Never seen it….

    Hmmm-
    Very interesting idea, this exact problem is not uncommon on some of the later model OMC looper engines, but I don’t think the sleeves can rotate on the older OMCs, but surely worth consideration.