Reply To: bottom cylinder fouling Big Twin 25hp

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October 26, 2020 at 9:01 am #219352
Buccaneer
Participant

    US Member

    What about the “oil drain system” and that little flopper check valve in the front crankcase cover.
    If that’s not working will you get excess fuel and oil in the bottom cylinder, causing
    your symptoms?

    Prepare to be boarded!