Genny starts, runs rough and then cleans up

lincster wrote:
Wanted to see what others thought.

Genny just started acting like this.
Fire it up, runs rough for 5-10 min, then cleans up and runs perfect.

I have never let the carb sit for more than 1 month without running gas through it.
Change the plugs/filters etc per the schedule in the owners manual.
In fact, air filter gets changed every 150 hours with the oil and oil filter.
Changed plugs per the manual.

Any ideas?

I know thru the years of being a member in here, that you take good care of your stuff. I can't remember the last time you asked for advice on something. My thoughts, same as the others. Run some seafoam thru it, worked on ours years ago when our genny did the same thing.