A-B1797262-AI TUBE-BREATHEROne New Aftermarket Replacement Breather Tube Fits Briggs and Stratton (B&S) Small Engines This aftermarket replacement breather tube services the crankcase ventilation system on Fits Briggs and Stratton small gasoline engines. The breather tube routes excess crankcase gases and pressure away from the engine, helping prevent oil leaks, smoke, and internal pressure buildup. A failed or cracked breather tube can cause oil consumption, rough running, and