A-B1594219-AI KNOB-CHOKE SHAFTOne New Aftermarket Replacement Choke Shaft Knob Fits Briggs and Stratton (Fits Briggs & Fits Stratton) Snow Series Engines This choke shaft knob (also called a knob choke shaft) is the manual choke control knob mounted on the carburetor choke shaft of select Fits Briggs and Stratton Snow Series small engines. It allows the operator to set the choke position for cold weather starting. Compatible with Snow Series OHV engines in the 200000 and 210000