Sorry about your power outage. I see some are still without power after a week. (I live in SW pa also) I bought the same generator a few months ago. How did the generator work out for you? I seem to like it. Have only run for a 3 hour outage it was a little loud.
As far s vibration or shimmy on machined rotors..check for rust or corrosion between the rotor and hub. Tiny particles make a huge difference. Hope all goes well.
Kubota Zd-28 600hr springtime service
3.6 gal Amilie full synthetic 15-40
2 napa 3002 filters
napa gold oil filter
Wix air filter
Blades sharpened & all greased up ready to roll...