Yamaha - Water Pump Housing Cooling System Component 6L2-44311-01-00. Overview. The Yamaha Water Pump Housing 6L2-44311-01-00 is one of those parts that keeps your engine cooling system doing its job without much attention-until something wears out. When the housing gets scored or out of shape, you'll notice weaker water flow or rising temps pretty quickly. It holds the impeller in place and directs water through the engine, so everything depends on it staying solid. If you're servicing the water pump, this is one of those parts worth replacing while you're in there.. Key Features. • Controlled Water Flow Channeling - Directs cooling water through the engine to maintain proper temperature.. • OEM Fit Precision - Built to Yamaha specifications for correct alignment and secure installation.. • Impeller Support Structure - Holds the impeller in position for efficient and consistent water movement.. • Corrosion-Resistant Construction - Designed to handle marine environments and long-term u