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  1. #1

    2003 Ultra 150 Comperssion ????

    I am looking at an 2003 Ultra 150 with about 40 Hrs on it. The manual says
    the compression should be @ 98 psi to 150psi. All three cyls were 105 psi
    using a Snap-on tester. This is on the low end of the range. Any body
    have any experience with this .Thanks


  2. #2
    witness140's Avatar
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    I have two ultras that I work on. Both have compressions consistently around 110-115. All gauges vary. How you do the test matters as well. I always do the test with a cold engine, fully charged battery, wide open throttle. Choke off. Fuel off.

    Both machines do 64-65mph WOT.

    If the compressions were 105 across all 3 I would venture to say it is fine, and that is just how your gauge reads.

  3. #3
    Thanks I check compression the same way execpt I do a warm engine. Ski is clean and it just seams a little on the low side.
    for the hours on it. I am just going to have to get it out and run it a bit.

  4. #4
    steve45's Avatar
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    What is your elevation? You won't get nearly as much at higher elevations.

  5. #5
    On the Jersey Shore Coast. I cant get any closer to sea level than that. lol What compression is your Ultra?

  6. #6
    steve45's Avatar
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    Quote Originally Posted by frankbarb View Post
    What compression is your Ultra?
    I have no idea.

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