A-B1698778-AI KIT-CHOKE SHAFTOne New Aftermarket Replacement Choke Shaft Kit Fits Briggs & Fits Stratton Small Engines This aftermarket replacement choke shaft kit Fits Briggs & Fits Stratton (B&S) small engines equipped with a Nikki carburetor. The choke shaft is a carburetor component that controls the air fuel mixture for cold starts a worn or damaged shaft causes hard starting, rough running, and poor throttle response. Replacing the choke shaft kit restores smooth choke