Craftsman 917.28749 Operator's Manual page 31

TROUBLESHOOTING CHART:
See appropriate section in manual unless directed to Sears service center
PROBLEM
Excessive vibration
Engine continues tc
run when operator
leaves seat with
attachment clutch
engaged
Poor cut - uneven
cutting
Mower blades will
not rotate
Poor grass
discharge
CAUSE
10 Spark plug wire loose.
11
12
13
14
Dirty engine air screen/fins.
Dirty/clogged muffler.
Loose or damaged wiring.
Carburetor out of adjustment.
15 Engine valves out of adjustment.
1 Worn, bent or loose blade.
2 Bent blade mandrel.
3 Loose/damaged part(s).
CORRECTION
10 Connect and tighten spark plug
wire.
11 Clean engine air screen/fins.
12 Clean/replace muffler.
13 Check all wiring.
14 See "To Adjust Carburetor" in
Service and Adjustments section.
15 Contact a Sears or other qualified
service center.
1 Replace blade. Tighten blade bolt,
2 Contact a Sears or other
qualified service center.
3 Tighten loose part(s).
Replace damaged parts.
1
Faulty operator-safety presence
control system.
1 Worn, bent or loose blade.
2 Mower deck not level.
3 Buildup of grass, leaves, and
trash under mower.
4 Bent blade mandrel.
5 Clogged mower deck vent from
build-up of grass, leaves, and
trash around mandrels.
1 Obstruction in clutch mechanism.
2 Worn/damaged mower drive belt.
3 Frozen idler pulley.
4 Frozen blade mandrel.
1 Engine speed too slow.
1 Check wiring, switches and
connections. If not corrected,
contact a Sears or other
qualified service center.
Clean around mandrels to
open vent holes.
1 Replace blade. Tighten blade bolt.
2 Level mower deck.
3 Clean underside of mower
housing.
4 Contact a Sears or other
5
2 Travel speed too fast.
3 Wet grass.
4 Mower deck not level.
5
6
Low/uneven tire air pressure.
Worn, bent or loose blade.
1 Remove obstruction.
2 Replace mower drive belt.
3 Replace idler pulley.
4 Contact a Sears or other
qualified service center.
Place throttle control in "FAST"
position.
2 Shift to slower speed.
3 Allow grass to dry before mowing,
4 Level mower deck.
5 Check tires for proper PSI.
6 Replace/sharpen blade. Tighten
blade bolt.
31