Bill Marrs wrote:

If a person had two small 110VAC generators. Ganged the commons and fed one
generator into each leg of a 220VAC single phase circuit, would it work?
I'm
thinking 220v well pump, small transformer type welder, clothes dryer etc.

If it would work, would the two gen-sets need to be the same size?

There is probably some simple reason why this is a really bad idea, but I
don't have
enough electrical background to see it.

Thanks,

Bill

Definitely won't work connected as you indicate, for the reasons other
posters noted.

It is possible to parallel two small gensets, and in this case you'd
need to feed a suitably sized step up transformer if you needed 240V.
There was an extensive thread on paralleling generators a week or two
ago on alt.energy.homepower presumably you can find archives of it.