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  1. #1

    Low Compression,

    I have two VX's that I took in for service and they told me that they had low compression and that I must have gotten water in them. I told them if so insurance would cover it. They said if not they would cover under warranty. Now they pulled the valve covers and say no water present. Must have just wore out. I have 150 hrs on them. What is the life expectancy on these?


  2. #2
    Neighborhood Superman SlowStang305's Avatar
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  3. #3

    Other Idieas

    Any ideas on why the low compression? Wear just doesn't seem right.

  4. #4

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    what fuel are you running them on, what did the plugs look like when they removed them.

  5. #5
    volltrex's Avatar
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    So 2 VX's both have low compression? What are the numbers? Did they do a leak down test........where do they think compression is being lost. How have the skis been running......if close to normal I would either recheck the compression yourself or get a 2nd opinion from someone else.
    My FX has over 300 hrs........compression is still like a new motor!

  6. #6
    They have been running good, just don't have the power they used to. When they were new they would do 62 top end, now probably 52. Not sure they have done any test as to leak down.

  7. #7
    Compression is about 120.

  8. #8

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    Motex,


    Those skis won't do 62! Actually 52 to 55 is more accurate!
    If they are still under warranty, I would get another dealer's take on this as well! Also I would certainly ask someone else to do a compression check if you can't do it yourself!

  9. #9
    Neighborhood Superman SlowStang305's Avatar
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    Motex...

    Top speed of a VX is 53MPH, the guage is not accurate so it did not go 62. Replace all of the spark plugs and take out the air filter and see what the ski runs. I think you may find that the plugs are fouled (VX plugs go bad often, sometimes 30hrs is enough especially if you idle a lot). The air filter gets soiled with oil if you ever overfill it. That will kill your top speed. I think the shop you are talking to has no idea what they are doing.

  10. #10

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    That's pretty low!
    Quote Originally Posted by Motex View Post
    Compression is about 120.

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