Yamaha - Water Pump Housing Cooling System Component 6CJ-44311-00-00. Overview. On the F70, the cooling system has to stay dialed in, especially if you're running long or in warmer water. The water pump housing plays a big role in keeping that flow consistent and sealed where it needs to be. I've seen overheating issues come down to wear inside the housing more than people expect. When it's in good shape, water moves clean and steady, and the engine runs exactly how it should.. Key Features. • Directed Cooling Flow Design - Channels water efficiently through the pump for consistent cooling.• Durable Housing Construction - Built to handle constant water movement and internal pressure.• Precision Internal Fit - Ensures proper sealing and alignment with the impeller and pump components.• Reliable Temperature Control Support - Helps maintain stable engine operating temperatures.• Corrosion-Resistant Build - Designed to withstand harsh freshwater and saltwater environments.. Engine & Boat C