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where could that spring of really gone?

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tymorrissette

Post subject: Re: where could that spring of really gone?

Posted: Tue May 26, 2015 6:26 pm

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Posts: 225

Got my temp sensor today...came sooner than expected. Just waiting on the new temp gage so I can check both things when I can get to the boat this weekend.

Interesting when I measured the resistance through the sensors at room temperature that I got different numbers.

Old sensor: 350
New sensor: 850

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rpengr

Post subject: Re: where could that spring of really gone?

Posted: Wed May 27, 2015 6:49 am

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Joined: Sun Jul 22, 2012 5:10 pm
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Location: West Palm Beach, FL

tymorrissette wrote:

...Interesting when I measured the resistance through the sensors at room temperature that I got different numbers.

Old sensor: 350
New sensor: 850

Well hopefully that means that you found the problem!

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tymorrissette

Post subject: Re: where could that spring of really gone?

Posted: Wed May 27, 2015 7:44 am

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It tells us something.

Fingers crossed!

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tymorrissette

Post subject: Re: where could that spring of really gone?

Posted: Thu May 28, 2015 9:03 am

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Got my gauge this morning! Also found this useful chart from Faria incase anyone else is doing similar troubleshooting.

http://faria-instruments.com/site_manuals/IS0085E.pdf

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rpengr

Post subject: Re: where could that spring of really gone?

Posted: Thu May 28, 2015 12:56 pm

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tymorrissette wrote:

Got my gauge this morning! Also found this useful chart from Faria incase anyone else is doing similar troubleshooting.

http://faria-instruments.com/site_manuals/IS0085E.pdf

So Faria gives:
450 ohms at 100F
99 ohms at 175F
29.6 ohms at 250F

Would have been nice to give the number for 212F (boiling water at sea level) for easy checking. We once calculated that it would be 53 ohms at 212F

Ray

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tymorrissette

Post subject: Re: where could that spring of really gone?

Posted: Sat May 30, 2015 11:56 am

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Got to the boat this morning and good news! I installed the new water temp sensor and hooked up the 2nd auxillary temp gage with some test leads. Started up the boat and let it warm up. Used the IR gun to take readings and both the dash gage and the extra gauge read the same temp and agreed with the sensor.

So in the end I did have a bad water temp sensor. My test of measuring the resistance when at room temperature was the proper way to diagnose this issue.

Now we can get this thing in the water (after i fix the horn).

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LouC

Post subject: Re: where could that spring of really gone?

Posted: Sat May 30, 2015 4:09 pm

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Joined: Thu Jun 29, 2006 10:26 pm
Posts: 5663
Location: Long Island NY

Good work see all you need is some simple diagnostic tools (ohmmeter and IR temp gun)....

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