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  1. #1

    Ultra 300 rp/m Problem


    My Ultra 300X runs perfectly, but when I do a fullgas run for about 1-2 minutes and leave the gas Lever than varies the Standing gas extremely back and forth until partially under 800 rp/m, so that the motor goes off. when I go for a full gas run and leave the gas Lever again, and i pull the gas Lever for 1 sec. than it has the normal idle speed.

    knows one the Problem ???

  2. #2
    I had similar issue,but it would stall out if I didn't feather the throttle? Only when hot..same with my 15f stx..

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