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  1. #1
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    How mutch can i cut my Johnson head ?

    Hi, i am new here, hope this is the place to get answer.
    I have a totaly rebuild 1998 Johnson Oceanrunner 115hp, i have own this engine for many years, i want a bit more compression, how mutch can i cut the heads for our 95 octan pump gas ?

  2. #2
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    Try posting this in Technical Discussion. There are much more visitors there. Welcome to Scream and Fly ! Mike
    Cheaters never Win !!!

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  4. #3
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    Also make sure we're speaking of the same octane ratings method

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