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  1. #1
    Member
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    Dec 2021
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    Raleigh NC
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    2010 4 cycle 30 hp Merc compression test?

    When I do a compression test on a 2001 40 hp 4 cycle Merc motor how do I turn off the gas so the cylinders won't load up (wash out)? Also, what is the best way to get to the bottom plug?

    40ELPT 4S
    Ser # OT288196

    Thanks much!
    Last edited by MattG.; 12-30-2021 at 08:21 AM.

  2. Member
    Join Date
    May 2011
    Location
    Spangle, WA
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    6,180
    #2
    Might try the 4-stroke forum - Mercury - 4 Stroke / Verado
    _______

    Phil
    '09 Hewescraft ProV
    '09 150 Optimax


  3. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
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    Greenville, SC (US)
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    94,945
    #3
    Moving your post to the 4-stroke forum for you. Please update with the engine serial number.


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