Small Engines (Lawn Mowers, etc.): Cub Cadet rzt 50 stalling, cub cadet rzt 50, safety interlock

Question
Kohler engine, ~100 hours. Starts, runs a few minutes, then stalls. Wait a few minutes, starts, runs, stalls, etc. Changed the oil and cleaned air filter.

Answer
Have you tampered with the safety interlock system at all?  Seat switch perhaps?  When the engine quits quickly remove the spark plug and check to see if you have spark, if you do you have a fuel problem,  do you have fresh fuel in the tank?  if not drain and fill with fresh fuel from the pump.  Water in your fuel will cause this problem you describe.

This should get you on the right track.  Send me a followup if you need more help.