19231-ZY3-000 Impeller Cover - Overview. The 19231-ZY3-000 Impeller Cover is an essential component of Honda marine engine systems. It functions as a protective enclosure for the impeller, a critical part responsible for maintaining efficient water circulation and cooling within the engine. Designed to fit precisely with the water pump system, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda Impeller Cover desig