A-B1690629-AI SHAFT-THROTTLEOne New Aftermarket Replacement Throttle Shaft Fits Briggs & Fits Stratton Small Engines This aftermarket replacement throttle shaft Fits Briggs & Fits Stratton carburetors used in a wide range of lawn and garden power equipment. The throttle shaft is a carburetor component that controls airflow and engine speed by positioning the throttle plate inside the carburetor bore. A worn or damaged throttle shaft can cause rough idling, vacuum leaks, and poor