19241-ZY3-000 Water Pump Housing - Overview. The 19241-ZY3-000 Water Pump Housing is a vital component in the Honda marine engine cooling system. It houses the water pump impeller, facilitating the circulation of cooling water through the engine to prevent overheating. Engineered as a genuine OEM part, it supports long-lasting performance and reliability in demanding marine environments. Made to precise factory specs, this housing ensures a perfect fit and flawless integration with connected par