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  1. M

    86-87 Mariner 150 questions

    That’s what I thought about the pitch as well but I had multiple people telling me they run 25p with that set up. Looks like there are two styles of poppet for my model. Guess I’m going to need to see which I have. I’m guessing I should change everything behind the cover?
  2. M

    86-87 Mariner 150 questions

    Compression in 118-120 on 5 cylinders and 112-113 on the sixth and spark is good.
  3. M

    86-87 Mariner 150 questions

    It was a turbo prop, and water pressure was up to almost 15 at WOT
  4. M

    86-87 Mariner 150 questions

    I bought a 87’ stratos 179v with a mariner magnum 2.0l 150 on it. I had a 4 blade 22p prop on it and hit a rock at idle with it. Replaced it with a tempest plus 24p. I was running into heat issues at WOT before the prop change so I also changed out water pump and thermostats. Got it out today...
  5. M

    ID 1987 Mariner 150

    Hello, I bought an 87’ stratos 179V this year with a 150hp mariner on it. The cowl says it’s a magnum but the serial number doesn’t say it’s a magnum. Trying to figure out what the rpm range should be as they would be different depending on the type of motor. The regular 150 should be between...
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