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  1. #1
    Member MN Phoenix's Avatar
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    Jun 2004
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    Lake City, MN
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    510

    Can I run without the flush port cap?

    Mine somehow came loose and wasn't on the motor when I got to the ramp today. Can I run without it till I get a replacement?
    Joe Hall
    Lake City, MN
    Phoenix 721
    XP/ 250 Pro XS

  2. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    Greenville, SC (US)
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    #2

    Re: Can I run without the flush port cap? (MN Phoenix)

    I would feel more comfortable answering this question if I knew which engine you have... and had your serial number.



    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

  3. Member MN Phoenix's Avatar
    Join Date
    Jun 2004
    Location
    Lake City, MN
    Posts
    510
    #3

    Re: Can I run without the flush port cap? (EuropeanAM)

    I have a 2011 250 PRO XS. Serial is 1B807211, thanks for the help!
    Joe Hall
    Lake City, MN
    Phoenix 721
    XP/ 250 Pro XS

  4. 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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    98,049
    #4

    Re: Can I run without the flush port cap? (MN Phoenix)

    There is a check valve in the fitting.... however, it is highly recommended that the plug be in place.

    FYI... a standard garden-hose-bib thread is appropriate. Temporarily, you could utilize a "plug" purchased through your local hardware store.



    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

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