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Old 09-14-2020, 03:23 PM   #1
Made to last
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Join Date: Sep 2020
Posts: 5
Default Gas tank sender unit.

I am baffled over how the gas tank sender unit works on my 33 Tudor. It has a supply line and a very small copper line that runs to the gauge on the dash. I do not understand the principle of how it works. There are two cups one at half full and one at full. Any help would be great.
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