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  #1  
Old 07-26-2021, 02:50 PM
Bob Y Bob Y is offline
 
Join Date: Jul 2017
Location: Piedmont, SC
Posts: 287
Default 12iS Stuck Mechanical Fuel Gauge

Looking for any suggestions to this issue. My mechanical fuel gauge is stuck at around 18 gal. Here are the things Iíve tried so far:

- Filled and emptied the tank multiple times trying to get it to ďfloatĒ loose.
- Tried to snake a wire to the float arm, but no luck - too high relative to the baffle.
- Emptied the tank, lowered the tail to the ground and let it bounce on the nose gear multiple times to try and jar it loose.

Dreading the obvious of removing the gauge. Brilliant suggestions?
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  #2  
Old 07-26-2021, 04:40 PM
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larrynew larrynew is offline
 
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Location: In New Braunfels, ist das Leben schŲn!
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Default

Different airplane (RV-7A) but I had a stuck mechanical fuel gauge during the initial fuel calibration. I took a rubber mallet and tapped firmly on the access cover and it unstuck and worked fine for almost 1000 hours.
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  #3  
Old 07-26-2021, 05:23 PM
Bob Y Bob Y is offline
 
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Location: Piedmont, SC
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Thanks for the suggestion. Iíll give it a shot tomorrow. I did try banging on it with the heel of my hand, but didnít think of trying something more aggressive.
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  #4  
Old 07-27-2021, 11:45 AM
Bob Y Bob Y is offline
 
Join Date: Jul 2017
Location: Piedmont, SC
Posts: 287
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Thanks again for the suggestion, Larry. It worked! All I had to do was let the head of the hammer drop about an inch and it was enough shock to break it loose, butÖ as I suspected, whatever caused it to stick hasnít cleared, as itís still sticking as I fill and drain the tank. Gentle taps with the mallet reset it, so guess Iíll be pulling it out at some point, but at least itís a workable solution. I also wire tied a tube to a yardstick that I stuck into the tank and calibrated as I filled it, so Iíve now got a reliable backup. Just put my thumb over the end of the tube before removing and read the level on the yardstick.

I expected the mechanical gauge to have been the most reliable. Guess notÖ. Thanks again for the helpful suggestion.
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