Yamaha - Water Tube Cooling System Component 6N0-G4361-10-00. Overview. Cooling issues can sneak up on you, and a lot of times it comes down to something simple like a worn or restricted water tube. I've seen motors run hotter than they should just because flow wasn't moving clean through the system. When this tube is doing its job, water moves freely and keeps everything at the right temperature. It's one of those quiet parts that protects the whole engine.. Key Features. • Direct Cooling Water Routing - Ensures steady flow from the pump to the powerhead.• OEM Fit and Alignment - Built to Yamaha specifications for proper installation and sealing.• Corrosion-Resistant Construction - Designed to withstand constant water exposure.• Supports Engine Temperature Control - Helps maintain consistent and safe operating temps.. Engine & Boat Compatibility. Designed for Yamaha outboard engines utilizing internal water cooling systems. Commonly used across a range of Yamaha outboards where proper