A-B1594105-AI GEAR-TIMINGOne New Aftermarket Replacement Timing Gear Fits Briggs and Stratton Small Engines This aftermarket replacement timing gear (Gear Timing) Fits Briggs and Stratton small gasoline engines commonly found in lawn mowers and outdoor power equipment. The timing gear synchronizes the rotation of the crankshaft and camshaft, ensuring the engine valves open and close at the correct intervals during intake and exhaust strokes for smooth, efficient engine