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  1. C

    how to get more HP

    i would like to convert a 2004 4 stroke f15 to a f20 or bigger if it can be done. Or how to get more hp out of the f15. Thanks
  2. C

    what is the difference

    just wondering what the difference between a 2004 yamaha f15 and a 2004 yamaha f20 both 4 stroke Can you make a f15 a f20. Thanks
  3. C

    2004 yamaha f15 4 stroke

    i have a 2004 yamaha f15 4 stroke. just wondering if i can change the jets in the carb to make it a 20hp. thanks
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