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Thread: Water temp gauge

  1. #1
    Join Date
    Jan 2002
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    Default Water temp gauge

    Looking for recommendations for a mechanical water temperature gauge.

  2. #2
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    Feb 2005
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    Virginia
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    Default Re: Water temp gauge

    Quote Originally Posted by mariner2k View Post
    Looking for recommendations for a mechanical water temperature gauge.
    Old school thermometer?
    Or do you mean an analog readout/dial display for an electric signal?

  3. #3
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    Default Re: Water temp gauge

    Old school. No electricity.

  4. #4
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    Madison Wisconsin
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    Default Re: Water temp gauge

    There are several weighted fishing thermometers available, which can be dropped down on a string or your line for getting temps down deep if needed. I have one of these and it has always worked OK.



    https://www.walmart.com/ip/Vexilar-I...yABEgInjfD_BwE2c7a540e-1608-4130-9353-a934edced660_1.3dee88d4d9d27422bd61948ad08ed6fa.jpg

  5. #5
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    Aug 2016
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    Queens, NY
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    Default Re: Water temp gauge

    if you're wanting to measure coolant temp in a marine engine,
    the 'most basic' award might go to the Sika type mounted directly to the head like on some older Sabb diesels:

    https://www.ebay.com/itm/SIKA-Indust...4/153837585407


    for remote panel-mount gauges with long capillary tube senders, i've seen nice old school ones by classic american companies like Faria, Stewart-Warner, Rochester, and Carteret. i don't know how well the older automotive type gauges hold up in a harsh marine environment..

    sometimes you can find deals on old surplus or mil-spec gauges. this isn't a steal and it says 'lub oil' on the face, but it's an idea:
    https://www.ebay.com/itm/Military-2-...e/184032504656

    there are even trick gauges with mechanical senders but electrical contacts you can use to set off a high temp alarm or idiot light; Murphy Swichgage:
    https://www.ebay.com/itm/Murphy-Swic...A/303515015661
    https://www.ebay.com/itm/6FT-MURPHY-...S/223751508718


  6. #6
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    Apr 2005
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    Default Re: Water temp gauge

    The Stewart-Warner automotive gauges on my sailboat are 25+ years old. Only problem was the oil pressure gauge - the lightning strike that got the vhf, radar also took out that gauge - but none of the others. Lightning is strange. However, I don't know any that are sold as lightning-proof...

    More seriously - they've done absolutely fine. They are in the cockpit, but under a "portlight" - a rectangular one the covers them to prevent water getting on them.
    "If it ain't broke, you're not trying." - Red Green

  7. #7
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    Default Re: Water temp gauge

    My bad, I didn't specify engine coolant temperature.

  8. #8
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    Default Re: Water temp gauge

    Garrett, is your temperature gauge mechanical or electrical? I have one on there and now that I put on last year. Don't remember the brand, but other than plugging a hole it has never worked at all.

  9. #9
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    Apr 2005
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    Default Re: Water temp gauge

    Mine is electric.

    Here's a mechanical version from Summit Racing. They are good folks to deal with & have very good tech support. The SW gauges have stainless bezels as well.

    https://www.summitracing.com/parts/sww-82409-60
    "If it ain't broke, you're not trying." - Red Green

  10. #10
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    Sep 2009
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    Saint Helena Island, SC
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    Default Re: Water temp gauge

    They work well. You will be limited by the length of the capillary tube. Usually @ 6’. Do not cut or crimp it as it can’t be repaired.
    Fight Entropy, build a wooden boat!

  11. #11
    Join Date
    Dec 2003
    Location
    Sound Beach, NY
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    4,260

    Default Re: Water temp gauge

    I replaced the gauge on my Perkins 4-107 with the style pictured by Coelcanth, it may be a Murphy. My boat has a separate sender for high water temp, so I did not connect the alarm to the gauge. It fit directly into the engine where the old one did, and I drilled a hole to fit it next to the instrument panel.

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