I think I'm using the right term. The governor surges at any thing below wide full open and I'm not sure where to look? This is in a JD 240 Garden Tractor and has a 38" mower deck. It's just mows, no racing here. What should I do tear the carburetor off and clean ports/holes. This old girl goes thru coils when hot in the summer (I mean just quits) if that's any help. It's cool now and I was expecting it to run good, but "that ain't happenen". bjr