Yamaha - Tube,water - 6A1-44361-00-00Yamaha Water Tube Cooling System Component 6A1 44361 00 00 Overview This is one of those parts you dont think about until the engine starts running hot. The water tube carries cooling water from the lower unit up into the powerhead, and when its sealed and aligned right, everything stays at the proper temperature. But if its bent, corroded, or not seating properly, youll start seeing weak water flow or overheating issues. Its a simple piece, but its