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2006 90hp 2 stroke

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  • 2006 90hp 2 stroke

    at 4000 rpm suddenly drops to 3000, may go back to 4000 or stay at 3000
    need help

  • #2
    Could be dirty carbs, or loosing fire on one or more cylinders. Try cleaning carbs.
    Regards
    Boats.net
    Yamaha Outboard Parts

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