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.