Check out Good Parts new throttle shaft bushing kit. The original rubber bushings in the bulkhead rot and disintegrate leaving the throttle shaft free to flop around in the large hole. Conventional bushings require removal of the lever from the shaft and removal of the shaft from the bulkhead in order to install the bushings. Good parts new Nylatron bushings can be installed without disassembling and removing the shaft. The bushing for the driver's side and the stainless steel lock collar that goes next to it are split so they can be installed with the shaft in place. So if you have been putting off replacing your bushings give these a try. They can be installed in a few minutes. The kit is listed under Engine - Carburetor Accessories and Throttle Parts.