19220-935-010 Impeller Housing - Overview. The 19220-935-010 Impeller Housing is an essential component of the Honda marine engine cooling system. It encloses the impeller, which is crucial for maintaining the flow of water through the engine to prevent overheating and ensure reliable operation. Designed to support the cooling water pump system, this housing provides protection to the impeller while guiding water efficiently through the marine propulsion system. Engineered to meet Honda's origin