Craftsman 917.20391 Operator's Manual page 33

TROUBLESHOOTING CHART:
See appropriate section in manual unless directed to Sears service center
PROBLEM CAUSE CORRECTION
Loss of drive
Engine "backfires"
when turning
engine "OFF"
1 Freewheel control in 1
"DISENGAGED" position.
2 Debris on steering plate (if 2
equipped).
3 Motion drive belt worn, damaged, 3
or broken.
Place freewheel control in
"ENGAGED" position.
See "CLEANING" in the
maintenance section.
Replace motion drive belt.
4 Axle key missing.
Engine throttle control not set 1
between half and full speed (fast)
position before stopping engine.
Install axle key at rear wheel. See
"TO REMOVE WHEEL" in the
Service and Adjustments section.
Move throttle control between
half and full speed (fast) position
before stopping engine.
Engine dies when
tractor is shifted
into reverse
1 Reverse operation system (ROS) 1 Turn ignition key to ROS "ON"
is not "ON" while mower or other position. See Operation section.
attachment is engaged.
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