Yamaha - Water Pump Gasket Cooling System Seal 6EE-G4315-00-00. Overview. Anytime I'm into a water pump, I don't reuse old gaskets-just not worth the risk. A bad seal here can throw off the whole cooling system, even if everything else is new. I've seen engines overheat just from a small leak at the pump housing. With a fresh gasket in place, you know the system is sealed up and ready to move water the way it should.. Key Features. • Reliable Pump Housing Seal - Helps keep water contained within the pump assembly for proper flow.• Leak Prevention Design - Reduces the risk of water loss that can affect cooling performance.• Heat-Resistant Material - Built to handle engine heat and continuous water circulation.• Precision Cut Fitment - Matches Yamaha specifications for correct alignment and sealing.• Direct Yamaha Replacement - Ensures dependable installation and proper cooling system function.. Engine & Boat Compatibility. Designed for Yamaha outboard engines requiring a gasket within t