Recent content by TROUTN

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    Yamaha 9.9hp 4 - Stroke Upgrade to 15hp??

    I have a 2005 9.9hp 4 stroke Yamaha that I want to upgrade to a 15hp. Is this possible?? I know I did it with the 2-strokes years ago and you just replaced the carb and reed plate. Is the upgrade possible with the 4 stroke or is it more complicated. I have to use a motor with a 9.9hp model...
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    Yamaha 250HP V76 SWS II PLease Help! Desparate!

    Hello I have a 2000 Yamaha 250hp EFI V76 SWS II motor with 230 hrs and an intermitant problem. <br /> Goes like this-Start up motor let idle for 10 to 15 minutes, go to give throttle and at about 35 to 37 rpm's just before the boat will level off to plane it just shuts down and runs very rough...
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