Motor styarts and runs great, but no generation of any electrical power..

It has been suggested that one should "excite" the armature and another
mentions
polarizing the armature.

Ray-

I assume you have checked the wiring and circuit breakers to be sure there is
no open circuit. With the motor off, the D.C. resistance measured across the
A.C. output terminals should be fairly low.

With the motor not running, you might "touch" the AC output circuit with a car
battery, or perhaps the battery used for electric start. Hopefully there would
be no more than a small spark, but at worst the circuit breaker might pop. I
would think that small amount of excitation would accomplish the polarization,
and it would take off and deliver power the next time it was started.

The next time you start it after attempting the polarization, be sure there is
a sizeable load such as an electric heater. Just a light bulb may or may not
draw enough current to build up the magnetic field.

Fred