Yamaha - Water Inlet Cover Cooling System Component 6J9-45214-00-00. Overview. The Yamaha Water Inlet Cover 6J9-45214-00-00 is one of those parts that quietly protects your cooling system from trouble. It sits right at the intake, keeping debris out while making sure water flows where it needs to. When these covers get damaged or worn, you can start seeing weak water flow or overheating issues. It's a simple fix that can save you from bigger problems down the line.. Key Features. • Cooling System Protection - Shields the water intake from debris and blockage.. • Maintains Water Flow - Helps ensure consistent cooling water delivery to the engine.. • Corrosion-Resistant Build - Designed to handle constant exposure to salt and freshwater.. • OEM Fit Design - Matches Yamaha specifications for proper sealing and alignment.. Compatibility. Compatible with select Yamaha outboard engines using this water inlet cover configuration.Commonly used in Yamaha lower units with standard cooling intake