Fuel Gauge

Fuel Gauge

I have a 1979 Cherokee 6-300. The right fuel gauge intermittently read high then eventually started reading 0.  At annual both fuel sending units were overhauled and insulated bushings were installed.  Now after flying for an hour and burning from 35 gallons on the right down to 20 the fuel gauge once again peggs high intermittently. It reads the proper amount when not pegged to the far right.  The mechanic just sat in the plane and it does it even with the plane sitting still with only the master switch on. He is puzzled as where to go next.  Any help or suggestions as how to troubleshoot the problem or any ideas as to what it could be.  Thanks Frank

Edited By: rinaldof@mac.com
2017-07-11 07:20:20

rinaldof@mac.com
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Re: Fuel Gauge

Hi Frank,
There are only two items left if you're certain that the senders work okay.  You're going to need to check the wiring and the fuel gauge.  Checking the gauge is easy.  Move the wiring from the working gauge to the suspected gauge.  If the reading is okay, it's the wiring.  If the reading on the good side is intermittent on the bad gauge, it's the gauge.  Good luck and let me know how it goes!

Scott Sherer
N344TB - Piper Seneca
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Re: Fuel Gauge

Scott you'll love this one. I had the known working fuel gauge on the left put on the right.  We sent off the querky right gauge overhauled and put on the left We had already replaced both sending units on the right overhauled .   The left side has been untouched. Now we fill the tanks and take off. Guess what the left gauge now pegs to the right but will settle down and read correctly.  My guess it's the outside fuel sendings unitbon the left that needs to overhauled.  The right side works just fine now. I guess I'll get both on the left overhauled on the next annual. The gauge on the wing reads correctly.  Any other ideas.  Frank. This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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Re: Fuel Gauge

As the British say, "in for a penny, in for a pound!"  Last year I had all four of my senders replaced on my Seneca.  I feel your pain!  On the plus side, since I had the senders and wires replaced my gas gauges work really well.  I wish you the same thing!

Scott Sherer
N344TB - Piper Seneca
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