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  1. L

    2015 Yamaha 200HP I4, What is this part?

    The reason I asked about the LPS is. This is the is a motor that overheated badly. It was full of melted rubber from the water pump impellor, after a lot of work that included boring and new pistons, it seems to be working good in a barrel. My set up is just a motor on a stand. I have...
  2. L

    2015 Yamaha 200HP I4, What is this part?

    Thanks. I acidentally left it out when I did the assembly. It just fits kinda of loose in there. I will save it with my other extra parts. Thanks.
  3. L

    2015 Yamaha 200HP I4, What is this part?

    F200XB
  4. L

    2015 Yamaha 200HP I4, What is this part?

    I took these photos when I tore it down. Its in the base of the the power head. The motor runs in a barrel fine without it. Another question. Same motor 2015 F200 I4. Running YDS software. What does it mean when it says (main) or (sub). Example: LPS (main) or LPS (sub).
  5. L

    2015 Yamaha 200HP I4, What is this part?

    Sorry about how far I zoomed in. The website would not let me send the photos I had as is because they were too high resolution.
  6. L

    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?
  7. L

    Engine cylinder boring

    Thanks for the help. I had it bored and honed .030 over. Just got it back together. It fired up. Sounds good. Time will tell.
  8. L

    Engine cylinder boring

    Boscoe Thank you. I was hoping that was the case. From what I can tell Yamaha only offers a Standard size piston. Looks like WSM has options up to .030 over.
  9. 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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