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  1. 02-14-2016, 04:01 PM #1
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    Trap71
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    Default Correct fuel mixture for a 1938 Johnson MD 38

    I have a 1938 Johnson MD 38 that I have been working on. What would be the correct fuel mixture for this motor?
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  2. 02-14-2016, 07:18 PM #2
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    Default Re: Correct fuel mixture for a 1938 Johnson MD 38

    16:1 for all motors without bearings.
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  3. 02-15-2016, 10:16 AM #3
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    Default Re: Correct fuel mixture for a 1938 Johnson MD 38

    I have also heard to use gas with no alcohol.
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  4. 04-05-2016, 09:38 PM #4
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    Default Re: Correct fuel mixture for a 1938 Johnson MD 38

    Quote Originally Posted by Trap71 View Post
    I have also heard to use gas with no alcohol.

    The alcohol eats the coating off the cork float, then it becomes gas logged. Gasohol stinks. Hate that crap.
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  5. 04-06-2016, 01:58 AM #5
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    Default Re: Correct fuel mixture for a 1938 Johnson MD 38

    You can let the float fully dry out, clean it up with some sand paper and blow clean with compressed air. Then dunk it in a dish of clear fuel proof model airplane dope and let it drip and dry fully then it is ready for service.
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