I have a honda generator that is not putting out any ac voltage. It was working fine but when the power came on, it did not get unpluged and after that, I had no a/c voltage. How can I troubleshoot either the regulator or circuits?

If the fuel filter is good and lines are good then it sounds like the fuel is making its way to the carb built trash is stopping the fuel from getting into the engine in order to run. Clean out the carb bowl and clean out the valve stem. I know on the Honda unit the valve stem is removed with the carb bowl then then with a striaght screw driver you can remove the Body once you drop the bowl down with the stem so to clean out the cyclinderical body. Good luck