Been looking at all the 40 Yamaha conversions and mods and it got me thinking. I acquired a 1996 Yamaha 9.9MSHU that I have on a 1432 Jon. Been thinking I might as well play around with it and see what all I could do to make this into a fine running motor. Was thinking that if I change the reeds to a 15HP reeds, I could get a little more HP out of it. Was discussing this with someone else and they said that I might want to advance the timing 4 degrees after the reed change. Not sure if that is necessary but thought I could look into that as well. Never did timing on an outboards so I will definitely need to research how to do that. Was also thinking about getting a different prop for it as well, not sure what size prop at this point. Might have to do the mods first then get a tinytach and see what my rpms are before I can even get to a point to pick a better prop. Anyone have any experience in modding a Yamaha 9.9 or anyone can give me advice of things I could do on this project? I know that 9.9's are not used much for racing and could not find much on here on modding 9.9's but thought this might be a good place to start to pick a few brains.
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