I have a PowerBack Generator. 11 hp Industrial Briggs Stratton on it. Haven't used it in awhile. I fired it up today and I thought I would check the voltage. I am getting around 113 volts at each receptle. I plugged some lights in it, they look good and when I run several items it seems to keep up fine. It's a 6000 watt generator. Don't they idle adjust for loads?