Red, been gone awhile :-(
I cannot get the thing to measure full even by hand. I have a ground wire on the sender, I pull it out, push it all the way up, still at half - or just above. I was told from BowTiebits that the gauge was calibrate and it is hard to believe that I have had this same issue with 2 different rebuild gauges and two different senders. It really is not rocket science but it has me baffled.