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  1. #1
    Member
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    Feb 2015
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    Terre Haute IN
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    406

    Mercury Constant Beep.

    I have a 2006 250 XS optimax. The other day when I was out it randomly did a one minute constant beep tone. It always did it when I was at idle speed. I am assuming it may be a thermostat issue but was looking for some help on this. I plan to check thermostats on Saturday. There is plenty of water coming out of the pee hole and good pressure.

    Thanks,
    Mike

  2. Member 2500's Avatar
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    Jun 2004
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    Aiken SC
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    3,095
    JEFF MURRAY USMC
    RANGER Z521C & 15 VERADO PRO 250
    DEEP CREEK LURES and ROSE JIGS
    GREENFISH TACKLE and ALX RODS

  3. Member
    Join Date
    Jun 2013
    Location
    LONGVIEW TEXAS
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    13,941
    #3
    tell tale does not designate water supply to powerhead it is from compressor cooling system thermostats are known to be sticky on these engines
    .................................................. ...the scariest thing in life is the unknown ...................................

  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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    94,945
    #4
    Quote Originally Posted by Mfbassin View Post
    I have a 2006 250 XS optimax. The other day when I was out it randomly did a one minute constant beep tone. It always did it when I was at idle speed. I am assuming it may be a thermostat issue but was looking for some help on this. I plan to check thermostats on Saturday. There is plenty of water coming out of the pee hole and good pressure.

    Thanks,
    Mike
    The reference image above is not accurate to this model.

    SOLID TONE warning is a CRITICAL WARNING, meaning you should shut the engine off as soon as safely possible and get it in for service. I would not continue to run the engine as most of the common causes of this warning can potentially cause serious engine damage.

    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!
    Last edited by EuropeanAM; 03-20-2023 at 04:22 PM.


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