A-B1690564-AI TAPPET-VALVEOne New Aftermarket Replacement Valve Tappet Fits Briggs and Stratton Small Engines This aftermarket replacement valve tappet Fits Briggs and Stratton small engines used in lawn mowers, lawn tractors, tillers, and pressure washers. The valve tappet sits between the camshaft lobe and the pushrod, transferring cam motion to open and close the engine's intake and exhaust valves. A worn or damaged tappet can cause rough running, poor performance, or valve