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2009 9.9 hp Yamaha vs 15 hp 2 stroke

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  • 2009 9.9 hp Yamaha vs 15 hp 2 stroke

    I have a 2009 Yamaha 9.9 hp 2 stroke. Yamaha offers a 15 hp also what is the difference parts wise to make mine 15hp . I have checked the online parts fiche & don't see any diiference in part numbers on carb,intake,piston,CDI box,head or gasket. Just wanting a little more out of it. I did the samething with my 88 Evinrude 25 hp making it a 35 hp with a simple carb change but I can't find the difference in this Yammy 9.9 vs 15 .
    Anyone have an idea?

  • #2
    Re: 2009 9.9 hp Yamaha vs 15 hp 2 stroke

    There was a similar question awhile back......good luck.
    Larry

    http://forums.iboats.com/showthread....ht=upgrade+9.9

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    • #3
      Re: 2009 9.9 hp Yamaha vs 15 hp 2 stroke

      i was looking for the same thing with my 9.9? I was told you need a reed valve assembly and carb. Please post anything you find. I use our Yamaha on a 10 ft Achilles hard bottom and we need a little more HP to get on plane with 4 adults. I know I could get a 15 4-stroke but we also take apart the engine and boat to store on the transom. 4-strokes are a little too heavy.

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      • #4
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        Re: 2009 9.9 hp Yamaha vs 15 hp 2 stroke

        the only differences between the 9.9 and the 15 hp are the decals and the reed valve assembly. The assembly costs around $45 from bestboatparts.com and is easily installed by a tech. Total cost is much cheaper than the cost difference between the motors.

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