TW Enterprises in Billings Montana are the go to folks for generac generators. Number is 1-800-955-3795.
Might be worth a call for info.
I was told by Camping world I needed a new carb (14 year old Generac) and none were available. Found TW, made a call, and half hour later they were advising me they would have a brand new one sent direct from their supplier so I wouldn't have to pay shipping twice. Also, let me talk to a tech to explain the issue. Tech was very helpful and said to check a couple of other things as he wasn't convinced it was the carb.
He was right and instead of getting replacement (per camping world) for $6,000 got the thing fixed for about $450 (and didn't use the carb).
I have no connection to TW but always like to pass on vendors that offer great service and knowledge. Good Luck....