Mesl Me 70-24

[n86121]

Yup. I discovered that one years ago after buying my 337 and having a fuel gauge smoke on me. They run hot. Amazing. Mine is a 1969, same tech that went to the moon. Scary.

After an annual a few years ago an A&P forgot to reconnect the little air hose. Sure enough, over GA, smelled like we were flying over a forest fire. Another used gauge from Texas air salvage.

The weird thing is the gauges have four connection points. Seems like current runs through a coil plus current through another winding. Every other gauge in the known universe has two pins, these have four each. Won't work if you just apply current across two.

The wires get warm, the insulation breaks down, then they short and toast

So yes, it is needed, and does make sense, in a 1969 sort of way.