I have done some research but wanted a second opinion. I have found many surging problems listed and they all revert back to a spring on the throttle rod in front of the Carb, and that there is a hole in the throttle rod for the spring to attach too, and then the other end is to attach to the petcock on the engine block. Now if the throttle rod on my WC does not have a hole can the spring just hook over the rod or does a hole need to be there, and does the hole need to be directly above the petcock, or is there specific positioning of the spring on the throttle rod? I should mention when the tractor is just idling it purrrrrs really nice and basically sounds good. The Carb has been rebuilt, and the tractor starts easy.