A-B1692138-AI SEAL-O RINGOne New Aftermarket Replacement Intake Manifold O Ring Seal Fits Briggs & Fits Stratton Small Engines This aftermarket replacement O ring seal (intake manifold) fits between the carburetor and the engine block on a wide range of Fits Briggs & Fits Stratton (B&S) small gasoline engines. It creates an airtight seal at the carburetor to intake manifold junction, preventing vacuum leaks and fuel leaks that can cause rough running, hard starting, or loss