Re: Sudden drop in rpm’s

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July 25, 2016 at 9:56 am #40890
billw
Participant

    US Member

    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….

    Long live American manufacturing!