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Ski Nautique Temp Gauge Problem

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  • Ski Nautique Temp Gauge Problem

    My '89 Ski Nautique (Ford 351) overheated due to impeller failure in the external water pump. I replaced the impeller and the boat runs great. But the temp gauge continued to show overheating (in error). I replaced the temp gauge and thermostat (both, now twice) as well as the sensor on the engine block -- but the new gauge still doesn't work. Occasionally, the red light comes on, but I know she's running fine. Appreciate any ideas?


  • #2
    Re: Ski Nautique Temp Gauge Problem

    You could temporarily hook up a manual guage to the block to verify the reading.
    1980 Sylvan Aluminum 18' Sportster IO - Mercruiser 140
    1974 Glastron V-179, Mercruiser 140
    1984 16.5ft. Alumarine Sealark side console with 82 Merc 50
    Homeport - Lac du Bonnet, MB, Canada

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    • #3
      Re: Ski Nautique Temp Gauge Problem

      How do you "know" it's not getting hot.
      Of those who receive good advice, only the wise will profit from it.

      If you need it....Get it
      If you want it....Wait
      If you have it....Flaunt it


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      • #4
        Re: Ski Nautique Temp Gauge Problem

        When my Ford 351 in my ski boat is running i can lay my hand on risers for a good 5 seconds, can you do that with yours or are they very hot to touch?

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        • #5
          Re: Ski Nautique Temp Gauge Problem

          Originally posted by Reel
          How do you "know" it's not getting hot.

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          • #6
            Re: Ski Nautique Temp Gauge Problem

            Originally posted by reniell1969
            Originally posted by Reel
            How do you "know" it's not getting hot.

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            • #7
              Re: Ski Nautique Temp Gauge Problem

              It can't be overheating because I can see plenty of water coming out back when running on the trailer and can hold / touch the manifold and block for quite some time. It also runs just fine at full throttle in the water all day long. I just can't seem to get a gauge working???

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              • #8
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                Re: Ski Nautique Temp Gauge Problem

                I hope you didn't use any teflon tape on the sender. The sender has to be able to ground through the threads.

                Disconect the wire on the sender and touch it to a good ground, the guage should peg out (key on engine off). If it does not peg out there is a problem with the wiring or the guage. If it does peg out the problem is with the connector or the sender unit.
                Of those who receive good advice, only the wise will profit from it.

                If you need it....Get it
                If you want it....Wait
                If you have it....Flaunt it


                sigpic

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