crafstman lt1000 with kohler pro 17hp engine runs great for 5-20 minutes then dies

starts easily every single time. like i said runs for 5-20 minutes and dies but will start right back up.

replaced plug

also tried losoening fuel cap but still have the issue

fuel shutoff solenoid wasnt working so i did replace that but still seeing same issue

when its running it sounds good until maybe the last 10 seconds before it dies and it almost sounds like very light backfiring

when its trying to die if you choke it the engine will pick back up and sound ok for maybe 30 seconds then die anyway



family 1khxs.4902gb

displ (cc) 490

model cv490s

spec no 27508





any ideas?