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Gas guage

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Old Jul 14, 2010 | 09:10 PM
  #1  
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Question Gas guage

I'm trying to get an '88 FXRP back on the road. Down to the little bits. It's missing the gas guage. If the sending unit is good, will an off the shelf guage from Auto Zone work?
 
Old Jul 27, 2010 | 05:12 AM
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Check with Harley to see what Ohm your Sending Unit is,then you might find a guage compatible at your local parts store.It won't fit your tank you will have to make a bracket to mount it. " Good Luck "
 
Old Aug 1, 2010 | 06:09 PM
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Street, Thanks. I went to my service manual and found the specs of the sending unit and spent some time on the internet. Found iEquus gauges has a 2" guage for AMC cars which had specs (ohms) that were almost exactly the same as the Harley sending unit. 2" was a perfect fit and the gauge seems to work perfectly with a little fuel in the tank. Tomorrow I'll fill the tank and see what it reads.
By the way, this bike has been sitting for 5 years, put an old battery in it and it started right up.
 
Old Aug 1, 2010 | 06:26 PM
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I don't think it will work . The resistance needed for the correct operation would more than likely not be the same unless you are just lucky.
 
Old Aug 2, 2010 | 03:53 PM
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It seems to be working. Put about another gallon in and the gauge went to the half mark.
The specs for the sending unit is 40 and 250 ohms. For the AMC gauge it's 33 and 240. So close enough, I hope.
 
Old Aug 2, 2010 | 08:12 PM
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Glad you got it working.

However, I was going to suggest just going without. I had a brand new softail fresh off the showroom floor and the gas gauge didn't work from day one. I never bothered having it fixed.
 
Old Aug 3, 2010 | 05:46 AM
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It wasn't as much having a gauge that worked as much as having something to fill the hole on the tank.:-)
 
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