I should know the answer to this question, but I don't. So, HELP!
O-235 Supercub, 12 amp generator, in apparently working condition, with new, fully charged battery. But at idle, voltage goes so low the radio stops working. I know the master relay draws current, and we have an older Narco transponder and Com 122, but it's hard to believe that these are sufficient to pull a good battery below 10 volts. Is it possible that the generator itself is drawing current at engine idle?
We have an O-320 with the same generator, but more modern radios, and it seems to do fine.
Anybody out there have this problem? Any fixes short of fighting the B&C 337 nightmare? (yes, I believe the days of simple 337s are behind us)