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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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Old 05-10-2011
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Temp gauge

I have a Univeral 25 on my Catalina 36 and the water temp gauge is not operating. Should I test the gauge or the sender or both. In fact I have no idea where the sender is.
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Old 05-10-2011
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info

Hello,

The sender should be very near the thermostat. The thermostat is on the front of the engine. just above and to the right of the fresh water pump, ie the engine water pump.

you can see a diagram here

Torresen Marine

Once you find the sensor I would make sure the wire is connected and that the connection is clean.

I *think* that if you remove the wire from sensor and ground it (hold it against a shiny bolt on the engine) the gauge should read full hot.

Barry
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Old 05-10-2011
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Quote:
Originally Posted by BarryL View Post
I *think* that if you remove the wire from sensor and ground it (hold it against a shiny bolt on the engine) the gauge should read full hot.
Pretty sure that's correct. Puts 12 volts to the gauge.
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Old 05-10-2011
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Thanks guys, I will look into it Wed. I love this boat. Moved it from Chicago and doing a month+ live aboard at Apollo Beach Florida and going to New Port Richie to park it behind the house. She will get plenty of use.
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Old 05-12-2011
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Get to know these guys: c36.org - c36 Resources and Information. This website is for sale!, and their very good forum. We also have a lot of M25 engine information in our C34 Tech wiki: Catalina 34 - C34
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