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spinnerbayt

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My father just purchased a sma

My father just purchased a small boat with a Yamaha 9.9 and its been setting for a couple years. We took it down to the river and it starts and idles fine but doesn't have much power. We could only get it up to about 1000 RPM's so I think we are going to have to get a carb rebuild kit for it. If we are going to get a carb kit and such can we do anything to go ahead and bump it up to a 15hp? Any help would be great!
 
"The only difference between a

"The only difference between a 15 and a 9.9 is the carb and exhaust. I wouldn't do it either, Did you try just cleaning the carb out by taking it apart and flushing out every jet?"
 
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