Yamaha - Water Pump Housing Cooling System Component 6D8-44341-01-CA. Overview. The Yamaha Water Pump Housing 6D8-44341-01-CA is a critical part of the cooling system that surrounds and supports the impeller, helping direct water flow through the engine. If the housing becomes worn, scored, or warped, it can reduce water pressure and lead to overheating issues. Even with a new impeller, a damaged housing can limit performance. Replacing it ensures proper water flow and keeps your engine running at the right temperature.. Key Features. • Supports Water Pump Operation - Houses the impeller and directs water flow through the cooling system.. • OEM Fit Precision - Built to Yamaha specifications for proper alignment and sealing.. • Maintains Cooling Efficiency - Helps ensure strong and consistent water circulation.. • Durable Construction - Designed to withstand heat, friction, and marine conditions.. Engine & Boat Compatibility. Verify compatibility with your specific Yamaha engine model a