8000 Watt Generator help

On the slip rings it reads 5 omes and slip ring to ground open circuit

It would help if you could post images of whatever electronics power the brushes. In other words the field power. Lift the brushes. Stick a swatch of writing paper under them to insulate the brushes from the copper slip rings.

With a multi-meter, measure ohms resistance across the slip rings. Then set the meter for high ohms and measure Megohms from either slip ring to rotor steel. What do you get?

I was wondering if some one with the same generator could give me the serial numbrerr for it so generac tech support can help me thanks

I found out that the daton was made by generac and it is a generac model 9404 but generac can't help me without a generac serial number.

Their is no capacitor in this unit.

Does the generator have what looks to be a big motor starting capacitor? If yes, substitute a known good capacitor of the same voltage and rating