Small Engine Troubleshooting Problems? Ask a Mechanic Now.
If there is any moisture inside the generator at all, there is a good chance that it won't work.
The generator needs to be air dried, preferably in a moving air environment, for at least a week to ensure that any moisture trapped in the stator is evaporated.
Running the genset is a crap shoot.
It will move more air, but if moisture is in the wrong places, it can actually end up doing more damage.
Remember, electricity follows the path of least resistance - and a wet area is far less resistance than a piece of wire. If there is even the slightest short anywhere, it could easily lead to burning that component.
Was this what you wanted to know?
John Deere was feeding you a line.
Depending on the model number of your unit, the problem may be as simple as a bad capacitor or voltage regulator.
If they told you it would not be worth fixing without even seeing it, I would be inclined to take it somewhere else, or test it yourself. There is no telling what they would come up with if you took it to them.
Any small engine shop that works on generators should be able to check it out for you.
I'd like to know how you got hold of a Generac shop at 10PM.....
But they should be able to get to the bottom of it.