A-B1690513-AI BUSHING-THR SHAFTOne New Aftermarket Replacement Throttle Shaft Bushing Fits Briggs and Stratton (Fits Briggs & Fits Stratton) Small Engines This throttle shaft bushing installs in the carburetor of Fits Briggs and Stratton small engines, supporting the throttle shaft and maintaining a proper seal at the shaft bore. A worn or damaged throttle shaft bushing can cause air leaks at the carburetor, resulting in rough idling, surging, and poor engine performance. Replacing