Re: 54Evinrude Big Twin crankcase

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February 8, 2016 at 10:36 pm #31649
Don
Participant

    US Member

    Hmmm, just a thought after looking at pictures #3 and #4 again…
    One of the pressure valves for the tank is stuck open slightly. Is there anyway the pressure leak back from the tank entering that passage might be directed up the vacuum port for upper bearing drain? I kinda doubt it, but hard to tell until that gasket is removed…..