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Thread: Yamaha carb jet sizes question

  1. #1
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    Default Yamaha carb jet sizes question

    So I am fixing to have the head shaved on my 75hp yamaha 3 cyl 2 stroke.

    I looked at stock main etting on boats.net.
    C75hp jets #175
    C85hp jets #165
    C90hp jets #160

    So why are the main jets numbers getting smaller and where would I go with a high compression hydrotech head?
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  2. #2
    49ci OMC, Alum flat sabine river killer's Avatar
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    Get in touch with Jason Johnson.
    All boat racers lie, accept me and you, but I am starting to question you.
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