Yamaha - Tube, water 1 - 6C5-44361-10-00Yamaha Water Tube 1 Cooling System Component 6C5 44361 10 00 Overview Cooling flow is something you dont think about until the engine starts running hot. This water tube is what carries cooling water from the lower unit up into the powerhead, and if its restricted or out of place, the whole system struggles. Ive seen overheating issues come down to something as simple as a damaged or misaligned tube. Keeping this path clear is key to keeping the motor