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  1. R

    ? hp. chip

    is there a chip made for a 4 stroke 60 hp. mercury outboard 2003 to get more hp.
  2. R

    props

    i have twin 150 4 strokes yamaha on a 25' hydro-sports with 3 blades the size is 141/4" with 17 pitch s.s., to keep close to the same speed what size do i need in a 4 blade s.s. .
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