idle sadj.
 

i just got a backdraft 3.5 it has been broken in and tuned at a hobbire shop i ran it about 20 min put fuel in it and when it started it back the idle was way to fast so turned it down. now it wont start at all and have been messing with the idle adj. Can the idle adj. keep it from starting if so how do i get it to factory settings and start over