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    2015 Yamaha 200HP I4, What is this part?

    This little rubber part is about 1 square inch and inserts into a slot that looks like a water passage under the power head. What is is for? Will it cause me any problem if I forgot to install it?
  2. L

    Engine cylinder boring

    I acquired a 2015 4 cylinder 4 stroke 200HP Yamaha outboard engine. The YDS data shows it overheated about 26 times in its short 31 hour life. The over heat was caused by the water pump impellor melted into tiny pieces and got pump up into the power head. I disassembled things and removed all...
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