Yamaha - Tube, water - 6D8-44361-10-00Yamaha Water Tube Cooling System 6D8 44361 10 00 Overview The water tube is one of those parts that just needs to work, no questions asked. Its responsible for carrying cooling water from the pump up into the engine, and if anythings offalignment, corrosion, or damageyoull start seeing temperature issues. Ive run into overheating problems that came down to nothing more than a compromised tube. Keeping this piece straight and sealed makes all the