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Operating temp for 1985 70 evinrde

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  • Operating temp for 1985 70 evinrde

    Can anyone tell me the operating temperture range for my 70 evinrude (1985 model).
    Out on the water today and we went from 55 c to 78 c. Temp would sometimes go up planning and other times go down planning. Likewise trolling.
    I realise how the thermostat works, but in this case such extremes in temp and at varying times seems weird.
    Is this normal
    Many Thanks
    Steve
    Last edited by stevew; 05-06-2012, 03:10 AM.

  • #2
    No should stay relatively constant. You should check your thermostats for corrosion, also varify you have a good water pressure stream.
    Regards
    Boats.net
    Evinrude Outboard Parts

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    • #3
      To check the thermostat, are there any gaskets that will need replacing. If so Ill have to get a kit before I rip it out.
      The stream is good, so I'll check the thermostat.
      Can you tell me what the motor should be running at temperture wise ?
      Many Thanks
      Steve

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      • #4
        You will need the thermostat gasket and the head cover gasket. I believe either 165 or 195 degrees.
        Regards
        Boats.net
        Evinrude Outboard Parts

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