Joseph, what are you basing the 102 volt reading on? If that is the reading on the voltage over the driver, you might also confirm that with a VOM to make sure the built in meter is working correctly. Does that meter show about 120 volts on that leg when the coach is plugged into shore power? Have you checked the frequency (Hz) of each of the two legs?
If the voltage is truly 102 volts on one leg, Richard is correct and you likely have a problem with the windings in the generator. The voltage should be VERY close between the two legs on power produced by the genset.
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