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My Yamaha Waverunner has 1/2 the power with full throttle?

What would cause my '98 Yamaha Waverunner to have 1/2 the power when the throttle is full?
Mike Bazemore, July 2009
sounds like you COULD have oil in your air filter ? remove your air filter and see if its saturated with oil ? if it is replace it your problem should be solved .

kevin, August 2009
link Click here to see other fixes for Yamaha.