G govenor will not stop surging

Once that is properly adjusted, with the tractor running, lift out the governor rod from the butterfly with your right hand, and use your left hand to move the butterfly through the normal speed range of the tractor. As the engine speed changes, the governor rod should move back and forth smoothly. If it does, you may have a carburetor problem - if it does not, you most likely have a governor problem. These tests will help pin down the source of your surging problem.

I would disconnect each item in turn starting with the carburetor linkage and inspect moving parts for binding, with the engine stopped. If the governor rod is bent at the wrong angle where it enters the throttle lever it can cause it to bind or to even "lift" the throttle plate in it"s bore which can also lead to binding. Somewhere it"s sticking just ever so slightly, but that"s all it takes. Try downforce on the throttle lever as well while turning it to see if it binds for that reason. Sometimes the suction applied by the running engine will bind a throttle plate shaft especially when the throttle plate shaft bushings are shot, and you won"t find that one unless you run it without the governor hooked up so caution is advised. I had to use a custom washer under the throttle lever to keep the butterfly from digging into the bottom of the carburetor throat and binding once upon a time.

I went thru the Govenor linkage, spark and all and found that the hole feeding the idle jet was plugged with a wire (DLTX 71).

In regards to the linkage and earlier posts, with the throttle wide open the throttle rod should be 1/2 hole short. I have a JD manual covering the A and it lists several carbs including those used on the G, all specify the same set up. This includes the duplex carbs as well. I have a 60 and the adjustments are the same in the JD Manual.

Also check that when throttle down, the govenor spring "just" touches the govenor arm. This will keep you from closing the throttle disk completely and killing the tractor. The adjustment screw on the throttle shaft should be able to increase or lower idle speed.

With the Govenor seperate from the carb, as Duane mentioned, start the tractor and see if you have the same problem with surging. If you do the the problem is more than likely in the carb, if it doesn't then with the Govenor. I've heard of them not being put back together properly and causing odd problems.