We have a PowerBoss 5500 watt generator, its about 4-5 years old now, engine model 204412 / 0163E1 / 050916YE

We used this generator for the first time, after 1 week of using on and off, running fine, it started to run Full Wide Open.

Opening the Governor System, we are able to adjust the speed by hand.

Do you have any suggestions on how to repair this issue?

We are wanting to get it repaired, will the manuel 276781 show us how to tear it down? We want to take the generator off to get into the motor, will the manuel show this?

Is the manul 276781 no good or do you not have it?

No, I do not have it yet. I don't want to buy it if it will not help us.