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  • Engine temp.

    Now that I have my temperature gauge installed, I need to know normal operating temp. range. At what temp. do the thermostats open?

  • #2
    Thermostats open at 118-126 deg. overheat sensor signals warning at 183-194 deg.
    Regards
    Boats.net
    Yamaha Outboard Parts

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    • #3
      Blizzard,
      According to my Yamaha shop manual for my 2000 C115, the thermostats start to open at 118-126 degrees. They are fully open at 140 degrees.
      Don't be too concerned if your temp gauge is off a little - my Teleflex that I installed shows thermostats regulate at 130 degrees - you are just looking for what is "normal" on the gauge.
      If you want to get precise, you can calibrate the gauge and sensor in a pan of heated water and accurate thermometer, but it's really not necessary.
      How did your water pressure installation come out?
      Ken K

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      • #4
        Ken, Thanks for the info. I did not install a water pressure gauge because I presently don't have room on the panel. I plan to change the whole panel next spring and I will install one then.

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