Craftsman 917.20408 Operator's Manual page 35

TROUBLESHOOTING CHART:
See appropriate section in manual unless directed to Sears service center
PROBLEM
Engine "backfires"
when turning
engine "OFF"
Engine dies when
tractor is shifted
into reverse
CAUSE
1 Engine throttle control not set
between half and full speed (fast)
position before stopping engine.
1 Reverse operation system (ROS)
is not "ON" while mower or other
attachment is engaged.
CORRECTION
1 Move throttle control between
half and full speed (fast) position
before stopping engine.
1 Turn ignition key to ROS "ON"
position. See Operation section.
35