Have a b2920 tractor was out mowing was running fine was only out about an hour noticed was very low on fuel but not out and stop mowing. Came back about week later fueled up the tractor. Started it right up ran fine gave a little throttle and sputtered and stalled. Wil crank but is not hitting at all. Was just serviced had all new filters put on. Say there is less then 5 hour on them.