Yamaha - Tube,water - 6E5-44361-20-00Yamaha Water Tube Cooling System Water Delivery 6E5 44361 20 00 Overview Water tubes are one of those parts you dont think about until cooling problems show up. Ive seen motors overheat just because this tube was bent, clogged, or not seated right after service. Its what carries water from the pump up into the powerhead, so it has to be clean and properly aligned. When its right, you get steady cooling and no surprises out on the water. Key Features