19223-ZW1-B00 Pump Liner - Overview. The 19223-ZW1-B00 Pump Liner is a critical component within the Honda marine engine systems, specifically supporting the water pump assembly. This part plays a fundamental role in ensuring efficient water circulation to cool the engine, thereby maintaining optimal operating temperatures and preventing overheating. As an integral part of the cooling system, the pump liner is designed to fit precisely with existing hardware to uphold performance and durability