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    What should the compression be on a Yamaha

    I was wondering what the compression should be on a 1995 200 carb Yamaha? I know that I don't want pressure differances per cylinder, but I want to know what the factory psi is. I think omc is around 90psi and Merc is about 125, but I don't know what Yamaha is.<br /><br />Thanks for the help!!!
  2. R

    Which Merc would you choose?

    I have to replace my 93 mercs 200hp due to blowing up one this past weekend. My question is if given the choice for reliability only which motor would you choose: Merc 200 carb / Merc 225efi / Merc 225 opti? I know each has fuel advantages, but my main concern is reliability. I am leaning...
  3. R

    Mercury 200HP compression?

    What is the compression range for a 93 Mercury 200HP? Thanks for the input!!!
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