Briggs & Stratton Lever-Choke 591104 Genuine OEM. This is a Genuine OEM Briggs & Stratton part. This choke lever (part number 591104) is for lawn and garden equipment engines. Choke lever 591104 opens or closes the choke plate in the carburetor to help start the engine. Work in a well-ventilated area when installing this part. Drain the fuel tank and disconnect the spark plug wire before installing this part.- Briggs & Stratton Lever-Choke 591104 Genuine OEM.