Craftsman 917.27639 Operator's Manual page 31

TROUBLESHOOTING CHART:
See appropriate section in manual unless directed to Sears service center
PROBLEM
Mower blades will
not rotate
Poor grass
discharge
Headlight(s) not
working
(if so equipped)
Battery will not
charge
Engine "backfires"
when turning
engine "OFF"
CAUSE
1. Obstruction in clutch
mechanism.
2. Worn/damaged mower drive
belt.
3. Frozen idler pulley_
4o Frozen blade mandrel.
1. Engine speed too slow.
2. Travel speed too fast.
3. Wet grass.
4. Mower deck not level,
5, Low/uneven tire air pressure.
6o Worn, bent or loose blade°
7. Buildup of grass, leaves and
trash under mower.
8. Mower drive belt worn.
9. Blades improperly installed°
10. Improper blades used,
11. Clogged mower deck vent
holes from buildup of grass,
leaves, and trash around
mandrels.
I. Light switch is"OFF".
2, Bulb(s) or lamp(s) burned out.
3. Faulty light switch,
4. Loose or damaged wiring°
5. Blown fuse,
1, Bad battery cell(s).
2. Poor cable connections,
3. Faulty regulator
(if so equipped).
4o Faulty alternator.
Engine throttle control not set
between half and full speed
(fast) position before stopping
engine.
CORRECTION
1o Remove obstruction_
2. Replace mower drive belt.
3. Replace idler pulley.
4. Contact a Sears or other
qualified service center.
1. Place throttle control in
"FAST" position.
2o Shift to slower speed.
3. Allow grass to dry before
mowing°
4. Level mower deck°
5. Check tires for proper air
pressure°
6. Replace/sharpen blade.
Tighten blade bolt.
7. Clean underside of mower
housing.
8. Replace mower drive belt.
9. Reinstall blades sharp edge
down.
10. Replace with blades listed
in this manual.
1 t. Clean around mandrels to
open vent holes.
. Turn light switch "ON".
• Replace bulb(s) or lamp(s).
3. Check/replace light switch.
4. Check wiring and connections
5. Replace fuse.
. Replace battery.
Check/clean all connections.
& Replace regulator.
4. Replace alternator.
,
Move throttle control
between half and full speed
(fast) position before
stopping engine.
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