Yamaha - Tube, water 1 - 6EG-44361-10-00Yamaha Water Tube 1 Cooling System Water Transfer 6EG 44361 10 00 Overview Water tubes are one of those parts that quietly do their job until something goes wrong. Ive seen engines overheat just because a tube was slightly off or corroded where you couldnt easily see it. This is what carries cooling water up from the pump into the powerhead, so it has to be straight and sealed every time. When its lined up right, the cooling system works exactly like