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  1. 10-03-2019, 10:36 AM #1
    sblnchrd
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    250 pro xs compression

    what would be a good compression number for my 2012 250 pro xs. had it checked at dealer he said i had a reading of 105 give r take across all cylinders is this good seems low to me
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  2. EuropeanAM
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    Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #2 10-10-2019, 12:29 PM
    If you would, please take a moment to review the Announcements at the top of the Forum, and be sure to include the Required information when posting. Thanks!

    "Spec" is 90-110 psi, max variance of 15 psi. That being said, many are in the 120's when checked CORRECTLY. See the FAQ Section for the post on Compression Testing (which outlines the ONLY correct way).


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