Dr Jackal wrote:
Stationery Kohler 12Res located outside house. This unit is for
electrical outages only; it is not used 24/7.

It was a bad breaker on the generator itself. The generator tech
didn't have a replacement with him, and so he provided a "bypass"
temporary fix.

1) Will this band-aid fix cause any problems with overload, assuming I
don't use the unit for washer, dryer, air conditioning, or electric
range, but is connected to everything else including hot water heater?

2) The service co. is notoriously slow and I want the breaker replaced
ASAP. Can the breaker be replaced by an electrician, or does he need
to be a specialist with experience in dealing with the Kohler panel
(inside house) and automatic transfer switch? Thanks.

If YOU can remove the breaker, YOU can fix it. Take it to somewhere that
sells breakers, perhaps Graingers, say "Gimme one like this," then install
the new one.

I can't imagine it takes six fingers on your left hand to remove a
replaceable item. Go have a look.