Hello, I recently aquired a Cub Cadet GT 2544 which was doing well. A few days ago, after mowing for about 30 minutes, it just died. When trying to start it again, it was sluggish, and when it did start, it just kept backfiring and would not run smooth or keep running. I removed the battery, and since it was 2008 dated, I replaced the battery, and thinking it may be a fuel filter issue (as it seemed it wasn't getting enough gas) I replaced the fuel filter. Also, when trying to start it, it would start better with the choke pushed in and the throttle on fast.....it would not start with the choke pulled out. Can anyone tell me why it is back firing or where to go next to try to diagnose the problem? Thank you.