Thanks for all the replies, I think I'm going to talk to a Kohler
dealer on Monday and explain the problem to him. Someone else that has
the same genny said they had the same problem and they were told to
replace the plugs. Once they did this the genny ran fine again.

If anyone else can provide some input please do so, and I will be sure
to let you know what I do to get this issue sorted out.

Cheers...
Steve