A-B1691181-AI VALVE-THROTTLEOne New Aftermarket Replacement Throttle Valve Fits Briggs and Stratton (Fits Briggs & Fits Stratton) Small Engines This aftermarket replacement throttle valve Fits Briggs and Stratton small engines used in a wide range of lawn and garden equipment, including lawn tractors, snowthrowers, and blower vacuums. The throttle valve is mounted in the carburetor assembly where it regulates airflow into the carburetor to control engine speed and throttle