A-B1690024-AI SHAFT-THROTTLEOne New Aftermarket Replacement Throttle Shaft Fits Briggs and Stratton Small Engines This carburetor throttle shaft fits a wide range of Fits Briggs and Stratton (Fits Briggs & Fits Stratton) small engines used in lawn mowers and other outdoor power equipment. The throttle shaft sits inside the carburetor body and controls the flow of the air fuel mixture to regulate engine speed. A worn or damaged throttle shaft causes erratic idling, poor throttle