Yup first thing I would do is check all the batteries. Then I would check radio's throttle trim. Take the air filter off and turn on the electronics keep the engine off... Give it throttle a couple of time while observing the carb barrel moving. When let off the throttle the barrel should move back to the closed position with a small 1mm opening.

If the engine still has erratic idle find the manual and reset the carb back to factory settings. Then follow normal procedures to start the engine. Do not touch the needles! Let it warm up.... But either way let us no if you get to this point to help you out tuning the engine.


Since you said it's revving real high and it's spitting fuel out the exhaust either you're trim is off or the idle gap is set too high