Hello, I have a super-z with a 30 hp Kohler. Mower ran fine when I last parked it. Today when I try to start it, then engine turns over fine but it wont start. Tried choke and no-choke, every throttle position. I can see fuel in the fuel filter. Pulled a spark plug and it looks wet. Both tanks have gas in them. All fuses are good. Air filter clean. At this point I'm stumped. Anyone have any ideas as to what to try next? Thanks!