Stormin Mormon wrote:

"some" other appliances in the house would work. The ones on
the still-not leg. Other appliances, on the tripped leg,
would not work. Very possible that the generator would still
be under load.


Not if both breakers are accurate. The well pump loads both sides,
and one breaker by itself. The other breaker will have a higher load
and should trip first, if the load is more than a few tens of mA. He
could always add a small double pole breaker box and a 240 V 20A breaker
like those for a pump or small A/C to get common trip. Connect it to
the line side of the existing breakers.


--
You can't have a sense of humor, if you have no sense.