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  1. #1

    compression readings with bad rings

    I have received some conflicting advice on this topic from people i know and am hoping you guys can lend me a hand.

    If I have bad rings in need of replacement (to the point where I'm burning about a quart of oil a season) is it possible I could still get good compression readings? For the record, I'm not 100% sure I have bad rings just yet but I'm in the process of diagnosing it and I don't want good compression readings to mislead me.

    2006 yamaha waverunner fx1100 ho with about 200 hours on it.

    Thanks in advance!


  2. #2
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    it's possible to get a decent compression reading yet burn a ton of oil.

    what you need to do is a leakdown test, that will give you a better idea.

    You might need valve guides/seals or you could have a ring problem.

    if you're not fouling spark plugs, keep on going.

    check your manual, for higher operating temps you can go with heavier oil, which will reduce consumption in most cases.

    you can find leakdown testers and procedures with google.

  3. #3
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
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    Quote Originally Posted by RyanPuckhaber View Post
    I have received some conflicting advice on this topic from people i know and am hoping you guys can lend me a hand.

    If I have bad rings in need of replacement (to the point where I'm burning about a quart of oil a season) is it possible I could still get good compression readings? For the record, I'm not 100% sure I have bad rings just yet but I'm in the process of diagnosing it and I don't want good compression readings to mislead me.

    2006 yamaha waverunner fx1100 ho with about 200 hours on it.

    Thanks in advance!
    It's your oil rings that keep oil from going past your piston not the compression rings. Most likely you might have bad valve seals.
    To be honest with you a quart a season i would not be worried about it.

  4. #4

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    THE FX HO MR1, uses oil no matter what. Check your compression. You should have something from 195-205 psi for a descent 200 hour ski like mine.

  5. #5

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    BTW, at a quart a season, your ski isn't pushed or go through many hours a season. That is nothing!

  6. #6
    Normal on FXHO, very high RPM engine. You will notice if you ride at high rpm oil consumption will go up. Don't worry about it, just check your oil frequently.

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