Thank you heading down to MS next week and get to work on it.that model number info shows its a 21hp single cylinder kohler courage engine plus if your carb bowl gasket is leaking its most likely a bad float needle seat setup not properly sutting off fuel flow...youll need to either rebuild the carb or replace it because the gas getting past the bowl gasket usually means the float shutoff needle seat isnt working properly...also check your oil for gas contamination...