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  1. #1
    jasonahartz@gmail.com
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    Feb 2008
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    What size nuts on Mercury 225 EFI lower unit

    What size wrench do I need to take the lower unit off of my 225 EFI? Seems to be 11/16 but does not seem quite right?

  2. Member
    Join Date
    Jul 2004
    Location
    Penn PA
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    15,189
    #2
    Try metric tools......16mm or 17mm.



  3. jasonahartz@gmail.com
    Join Date
    Feb 2008
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    Lanesville
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    #3
    Thanks guys....Going to get a metric wrench set on the way home from work

  4. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
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    Greenville, SC (US)
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    95,166
    #4
    Please see the Forum Announcements, and be sure to provide the REQUIRED info when posting. Thanks!

    It is a metric size. However, you could use a 3/4" wrench in a pinch... it's very close.


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
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