This unit is about 16 months old and it leaks gas into the cyclinder to the extent that you can't start it. I took the carb apart cleaned the area where the float valve seats and put it back together. Three hours later the unit had gas in the cyclinder and unit was just sitting in the shop. I took the float valve out and put in one off another Kohler that was working and the result was the same. Now granted using an old one wasn't good but I am waiting to get new one. Question: Is there any way that gas can leak in the cyclinder and it not be the float valve? Ever see a bad float valve seat?