A-B1820414-AI SEAL-O RINGOne New Aftermarket Replacement O Ring Seal Fits Briggs & Fits Stratton Small Engines This aftermarket replacement O ring seal (Fits Briggs & Fits Stratton part 820414) is used across a wide range of Fits Briggs and Stratton small engines found in lawn mowers, riding tractors, zero turn mowers, and other outdoor power equipment. O ring seals prevent fluid and air leaks at component interfaces throughout the engine, including carburetor, fuel, and oil