Generator breaker keeps shutting off immediately

The MAX genset voltage is 132 volts. The Voltage range on a Onan is 126 to 132 volts. IF you read 170, why would you think that is OK? THAT either means your Onan voltage regulator is toast or the Genset SPEED is NOT 1800 RPM's at 60 htz. Increase in speed will cause an increase in output voltage. Most common cause of this is novices that increase the idle speed to stop a surge/hunt genset run. This does NOT fix the problem but does stop the Hunt/surge. But does increase the output voltage. Doug