Yamaha - Water Inlet Cover 2 Cooling System Component 6CB-45215-20-00. Overview. The Yamaha Water Inlet Cover 2 6CB-45215-20-00 is designed to protect and regulate the entry point of water into your outboard's cooling system. This component helps ensure a steady and unobstructed flow of water into the engine, which is essential for maintaining proper temperature and preventing overheating. If the cover becomes damaged, clogged, or improperly sealed, it can restrict water intake and affect cooling performance. Replacing it helps maintain efficient water flow and reliable engine operation.. Key Features. • Protects Water Intake System - Shields and supports proper water entry into the cooling system.. • OEM Fit Precision - Built to Yamaha specifications for secure installation and proper alignment.. • Maintains Cooling Efficiency - Ensures consistent water flow to help prevent overheating.. • Durable Construction - Designed to withstand water exposure, debris, and harsh marine conditions