I guess the first thing I would do is lose the gas treated with seafoam. I have heard a lot of bad stuff about seafoam. I would start with fresh gas and try resetting the gov per the Kohler manual. If that does not help then it sounds like your gov gear or cross shaft has bit the bullet meaning a tear down is in the near future. I hope that is not the case. The only additive I use in my gas is Stabil. Gas goes bad pretty quick any more. Good luck Kelly