Yamaha - Tube, water - 6S1-44361-12-00Yamaha Water Tube Cooling System Component 6S1 44361 12 00 Overview Cooling issues dont take long to show up when something in the water path isnt right. Ive worked on motors where a small restriction in a tube caused temps to creep up faster than expected. When this piece is clean and flowing properly, the engine stays cool and runs like it should all day. Its a simple part, but its one you rely on every time youre out on the water. Key Features