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  1. #1
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    McCormick, SC - By way of Aubrey,TX ,Buford, GA and originally Kettering, OH
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    Average running temp of a 250 ProXS 4S?

    What is your average engine temp after fully warmed up running over 4000 RPM's? Mine is about 135.
    2020 520L / 250 PRO XS 4S

  2. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    Apr 2008
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    Greenville, SC (US)
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    #2
    If you would, please take a moment to review the Announcements at the top of the Forum, and be sure to provide the Required Info (serial number) when posting. Thanks!

    Temp will vary depending on engine load, RPM's, lake water temp, etc.

    What is your temp AT IDLE?


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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  3. Banned
    Join Date
    Mar 2008
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    creston, California
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    131
    #3
    Same temp here !...