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Hi WD8CDH,
The sedan fuel sender is 12 7/8" long (to the nearest 1/8"), including the small plastic nut at the bottom. (Not visible in the picture.)
The wagon fuel sender is currently in use, so I can't get an exact measurement. Here's another picture. It looks like a little over 7 1/2", plus some accounting for the nut.
As for the threads, I'm not familiar with the "36mm x 1.50 pitch" notation, so I measured the outside diameter of the threads of the sedan fuel sender and got 44mm. (+/- 1mm as I don't have a proper caliper.)
As for resistance measurements, these two fuel senders were part of an experiment. The wires in my wagon fuel sender were shot, so I used this sedan fuel sender as an organ donor. My assumption was that the wires had the same rating in terms of ohms/unit length, and the wagon compensated for the difference in length using the 325-ohm resistor in the head of the fuel sender. (Pics attached.)
The result is that my fuel guage now deflects between half and full. (Half equalling empty.) At least my reserve light now works. I think I will have to fool with the resistor to get an accurate deflection.
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'83 300TD 176k "Sherman"
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