Yamaha - Water Pump Housing Set Cooling System Component 6D8-WS443-00-00. Overview. The Yamaha Water Pump Housing Set 6D8-WS443-00-00 is designed to fully support and protect your water pump system, ensuring proper cooling performance. This set includes the essential housing components that surround the impeller and guide water flow through the engine. Over time, wear or scoring inside the housing can reduce water pressure and lead to overheating-even if the impeller is new. Replacing the housing set restores proper water circulation and keeps your engine running at the correct temperature.. Key Features. • Complete Housing Set - Includes key components needed to support and protect the water pump system.. • OEM Fit Precision - Built to Yamaha specifications for proper alignment and sealing.. • Maintains Cooling Efficiency - Helps ensure strong, consistent water flow through the engine.. • Durable Construction - Designed to withstand heat, friction, and harsh marine environments.. Engi