Have a zero turn Cub Cadet with a 20 hp Intec twin cylinder engine. Sometimes it sounds like it is running OK, then at other times it sounds like it is getting too much gas and sort of flooding out. If you shut it off it doesn't really want to start well, until you crank it enough, sort of like it is flooded. Crank it long enough and it will begin to fire and run. Might have a little fuel vapors in the muffler (like it is running rich) when you shut it off as sometimes it will pop. I have disassembled the carb and did put a new gasket set into it. No adjustments on this carb., at least no main jet adjustment. Only 111 hours on the engine. Any ideas????? Thanks.