What motor is it fella,engine size, fuel % in it and heat of plug??

Tried heating the old girl up with a hair dryer 1st, get it hot then try it, with a touch of trim..

Also if possible slightly open the throttle using the trim on the reciever, could just be the idle gap in carb is too small or too big. With servos all on it needs to be 1-1.5mm gap with the trim set at neutral("0").

Could be air leeks, need to be propper air tight, esp round crankbearings, exhaust mainfold gasket, head shim(if fitted),...Probs needs factory settings re-set for carb lsn/hsn/idle and mid if fitted.

Oh and the plug should ideally ignite alt way to tip of coil wire.

If completely stumped post here http://www.google.com/url?sa=t&rct=j...e9wxzsjhQrJ_2g

Good bunch of lads