Ok well I got my new Fantom FR15 broke in finally....and it has been running perfectly....until now. As soon as I start it, without even touching the throttle, it revs up to almost full throttle and I have to kill it. Is this usually caused by an air leak? When I look at the throttle body it is all the way in (in the idle position) but it is runnig almost full throttle. If this is due to an air leak..can someone please tell me what I should do to correct the problem? This engine is brand new and I woudl assume the carb should be sealed tightly. Please help, thanks.