Yamaha - Cartridge Insert Water Pump Housing Component 6E5-44322-00-00. Overview. When you're rebuilding a water pump, the cartridge insert is one of those parts that can't be overlooked. I've pulled apart pumps where the insert was worn or scored, and no matter how new the impeller was, performance still suffered. This piece helps guide water flow and supports the pump's internal components. When it's in good shape, you get strong, steady cooling like the motor was designed for.. Key Features. • Water Pump Flow Support - Helps direct and stabilize water movement through the pump housing.• Impeller Surface Protection - Provides a smooth surface for proper impeller operation.• Durable Wear-Resistant Material - Built to handle friction and continuous water exposure.• Consistent Cooling Performance - Supports reliable water circulation under varying conditions.• Exact Yamaha Fitment - Matches factory specifications for proper installation and alignment.. Engine & Boat Compatibility. Desig