Reply To: 1955 Johnson 5.5 hp converted to single fuel line with pump puking oil or carbon

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April 26, 2026 at 12:12 pm #316528
RICHARD A. WHITE
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    Lifetime Member

    This is a 2-stroke, you WILL have a certain amount of unburnt fuel/oil mixture seeping. It can only be stopped by never running your motor.
    So you need to make a decision, run it and accept it, or buy a 4-stroke.
    The modern 2 cycle oil is designed to have much less environmental impact than regular motor oil used when the motor was new.

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