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    Yamaha 9.9 to 15 hp.

    I have a Yamaha 9.9 hp F9.9MSH2K. Can I convert it to a 15 hp? The only difference I noticed scanning the parts lists is the carburetor. The serial number is 66NK S 1000483 K. Thanks.
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    F9.9msh2

    I've studied Yamaha's online parts catalog. Looks like I can convert my F9.9MSH2 to a F15MSH with a carburetor change for less than $250. The CDI, valves, and camshaft appear to be the same. Changing the carb should be very simple. Even if fuel consumption doubled, this motor would still be...
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