Yamaha - Water Pump Gasket Cooling System Seal 6CJ-44316-00-00. Overview. When you're servicing a Yamaha water pump, the gasket is one of those small parts you don't skip. It's what keeps everything sealed so the pump can build proper pressure and move water the way it should. I've seen cooling issues come from something as simple as a worn or improperly seated gasket. When it's right, the system stays tight and the engine runs cool without any surprises.. Key Features. • Sealed Cooling System Fit - Provides a tight seal to maintain proper water flow and pressure.• Precision Cut Design - Matches Yamaha specifications for accurate fit and alignment.• Leak Prevention Support - Helps prevent water loss and ensures consistent cooling performance.• Durable Gasket Material - Built to handle heat, pressure, and constant water exposure.• Reliable Pump Efficiency - Supports optimal operation of the water pump assembly.. Engine & Boat Compatibility. Designed for Yamaha outboard engines utilizing