Deere model A carb problem

now when we are idling the engine, the idle seems to lunge like the throttle was whipped open, even though it isn't. I'm trying to figure out if it's just the float and needle, or is there something else i should be looking at?
anyone else have a lunging problem? what fixed it?
thanks Joe

: now when we are idling the engine, the idle seems to lunge like the throttle was whipped open, even though it isn't. I'm trying to figure out if it's just the float and needle, or is there something else i should be looking at?
: anyone else have a lunging problem? what fixed it?
: thanks Joe

Does the governor cause the surging, can any movement be seen at the throttle shaft?

: : now when we are idling the engine, the idle seems to lunge like the throttle was whipped open, even though it isn't. I'm trying to figure out if it's just the float and needle, or is there something else i should be looking at?
: : anyone else have a lunging problem? what fixed it?
: : thanks Joe

: Does the governor cause the surging, can any movement be seen at the throttle shaft?

There is a jet that you should pull out and clean.
Remove the bowl and look straight up to see it. Find a wood screw that will just start to catch hold of the inside (10 or 12?) and thread it in until it catches. Gently pull the jet straight down with vise grips on the wood screw. I suspect you'll find that the holes in the side of the barrel of the jet are clogged.