Fuel sending unit, Need specs. Options

[azbill]

Can anyone tell me the full/empty ohm output of the fuel sending unit? I'm thinking about redoing the gauge cluster.

Thanks
Azbill

[lapuwali]

We've had this conversation before. The stock sender is not capacitive, and there's nothing in the nature of rheostats that makes them dificult to measure. The stock sender is a pair of high resistance wires with the float sliding on them up and down a tube. The float conducts between the two wires. When the float is at the top, the total wire length is short, so there's low resistance. When the float is at the bottom, the current has to go all the way down one wire, across the float, and back up the other wire, so the resistance is high. Nothing magic about this.

301-015 is 10-180 ohms, according to the catalogs I have. There is a 0-90 ohm gauge, used with GM fuel senders, which would work if the sender is, in fact, about 5 to about 80 ohms. This is, in fact, a very common gauge. The British used it in their later (post about 1966) cars. There is also a 90-0 ohm adjustable gauge, but it's discontinued.

The 330 gauge Timo mentioned might be a Europe only gauge, or a different part numbering scheme.