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  1. #1

    Default Fuel mixture for a 1931 Johnson OM-55

    Looking for the right mixture for this motor. Old owner said it ran when he bought it, but didn't know what the mixture was.

  2. #2
    Join Date
    Apr 2010
    Location
    Bonita Springs FL
    Posts
    914

    Default Re: Fuel mixture for a 1931 Johnson OM-55

    My guess would be: Shell or Mobil 30 wt non-detergent oil mixed 1/2 pt of oil to a gallon of gas. I'm sure somebody else will chime in here on this one.

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