19234-881-850 Impeller Gasket B - Overview. The 19234-881-850 Impeller Gasket B is a critical component in Honda marine engine systems. This gasket supports the water pump system by providing a reliable seal between the impeller and pump housing to prevent water leaks. Designed for seamless integration with Honda marine engines, it ensures enduring performance, durability, and prevents water intrusion that could lead to engine overheating or damage.. Key Features. Precision-engineered impeller g