A-B1693628-AI SHAFT-CHOKEOne New Aftermarket Replacement Choke Shaft Fits Briggs and Stratton Small Engines This aftermarket replacement choke shaft (SHAFT CHOKE) Fits Briggs and Stratton (B&S) small engines used in lawn mowers, lawn tractors, and other outdoor power equipment. The choke shaft is a carburetor component that controls the choke valve, regulating the air fuel mixture during engine startup. A worn or broken choke shaft causes hard starting, rough running, and