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The Mariah Owners Club » Maintenance and Repairs » Mercury MerCruiser

What water temp does your engine run at?

Mercury MerCruiser

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Old 09-20-2007, 12:35 AM   #11
 
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Indy's right...I need a new one...it will warm up a bit when I pour the coals to it!
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    • Old 09-24-2007, 01:34 PM   #12
     
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    Mine runs below the 175 degree mark....



    Found this Tstat photo online

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    Old 09-25-2007, 03:21 AM   #13
     
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    Mine runs exactly at 150 degrees, at least that's what the boat thermometer says... has for 5 years.
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    Old 09-25-2007, 12:13 PM   #14

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    I checked mine again on the weekend and it runs at 150.
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    Old 09-25-2007, 05:02 PM   #15
     
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    Actually I studied mine again on the weekend, at it runs fairly consistently at about 160. I meant to ask my "guy" at the marine place about it, but I got talking about other things...
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    Old 05-13-2018, 01:46 AM   #16

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    Default Re: What water temp does your engine run at?
    Mine runs at about 110ish. I replaced the thermostat and the temperature sending unit and its still around 110. I verified that the gage is functioning by grounding the lead to it. I verified that the temperature is accurate with an ir gun. I'm not sure what to try next other than trying another new thermostat.
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