The Stovebolt Site Forums The Shop Area Interiors new gas gauge goes halfway and stays when tank is full.

I do not see any consideration of 0-30 ohm sender (original resistance-range, 1964 and earlier) vs 0-90 ohm sender (1966 and later resistance-range).

Might that be a factor here? (forgive my ignorance for asking - continuity and 6v/12v are my only electrical understandings).