19223-ZY9-H00 pump liner - Overview. The 19223-ZY9-H00 Pump Liner is a vital component supporting the fuel system in Honda marine engine systems. It functions as a protective casing within the water pump assembly, designed to ensure consistent and reliable fuel flow. By maintaining precise alignment and sealing within the pump, this liner contributes to the overall health and efficient operation of the engine. Engineered to OEM standards, it ensures seamless integration with existing parts, main