It seems automotive style fuel gauges use a heater/bimetallic strip circuit for the movement which provides for a steady needle (slows the response time). I can get an automotive style fuel gauge from Oreilly for $17 that operates in the same range as most marine gauges (30 to 240 ohms). I cracked mine open and need some help identifying one of the solid state components (picture attached). If I can get it at the electronics parts house I will just fix mine. It is a Faria gauge, the movement coil has high resistance and appears to be good and I can check the resistor but feel it is this third component that is the problem. When I short the sending to ground (0 ohms resistance) the gauge deflects 1/2 way, I think it should peg full but I may be wrong. I am considering the auto gauge for the steady needle movement but would rather have matching gauges if I can fix mine.
