Re: Oil Sludge from resurrecting a 1957 35 hp Johnson RJE-19

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May 29, 2017 at 12:19 pm #58579
opposedtwin
Participant

    US Member

    Mark,
    Excellent job on the boat and motor! If you’re concerned about the oil, I would try synthetic like another member mentioned.
    I would be concerned about the low compression numbers. 90 is quite low for that motor. A good number is 120 lbs. At 90 lbs you’re going to have issues with idling, etc. Maybe the rings are stuck or are sticky and they will free up after running at WOT. Does it idle well?
    Scott