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.
Bob Y - builder 12iS E-LSA
N569TT first flight 2/9/2020