Yamaha - Water Pump Repair Kit Cooling System Service Kit 6EE-W0078-01-00. Overview. If there's one thing I stay on top of with Yamaha outboards, it's the water pump. I've seen too many motors run hot just because the pump wasn't serviced in time. This kit is what you reach for when you want to refresh everything and know it's done right. Install it, and you can head back out knowing your cooling system is ready to handle the load.. Key Features. • Complete Pump Service Kit - Includes essential components needed to restore water pump performance.• Strong Cooling Water Flow - Helps maintain proper circulation to keep engine temperatures in check.• Durable Marine-Grade Parts - Built to handle debris, heat, and constant water exposure.• Restores Pump Efficiency - Brings cooling performance back to proper operating condition.• Factory-Matched Fitment - Designed to work seamlessly with Yamaha cooling systems.. Engine & Boat Compatibility. Designed for Yamaha outboard engines requiring a wat