fuel sending units/Shadin totalizers

[Bob Cook]

John

These fuel guages are a pain. These are pennycap capacitive type probes and since there are no moving parts (only capacitance that changes). Replacing the probes will not fix the problem IMO.

Suggest cleaning the contacts and checking resistance of wires. The control unit is up under the headliner and check the wires going in and out. The output of this unit changes the current to the guage on the instrument panel. There were a couple of versions.

I would consider going the EI route as I think these guages are certified for the 336/7.

The best alternative is to use a Shadin Fuel flow instrument then you know EXACTLY how much fuel you have remaining.

I personally do not trust the guages, and they do work most of the time....

Wiring and connectors are most of the problems....

bob