Craftsman 28927 - YT 4000 24 HP 42" Yard Tractor Operator's Manual page 31

TROUBLESHOOTING CHART:
See appropriate section in manual unless directed to Sears service center
PROBLEM
Loss of power
CAUSE
1 Cutting too much grass/too fast.
2 Throttle in "CHOKE" position.
3 Build-up of grass, leaves and
CORRECTION
1 Raise cutting height/reducespeed
2 Adjust throttle control.
3 Clean underside of mower
trash under mower.
4 Dirty air filter.
5 Low oil level/dirty oil.
6 Faulty spark plug.
7 Dirty fuel filter.
8 Stale or dirty fuel.
9 Water in fuel.
10 Spark plug wire loose.
housing.
4 Clean/replace air filter.
5 Check oil level/change oil.
6 Clean & regap or changespark plug
7 Replace fuel filter.
8 Empty fuel tank and refill tank witi-
fresh, clean gasoline.
9 Empty fuel tank and carburetor,
refill tank with fresh gasoline and
replace fuel filter.
10 Connect & tighten spark plug wire
11 Dirty engine air screen/fins.
12 Dirty/clogged muffler.
13 Loose or damaged wiring.
14 Carburetor out of adjustment.
11 Clean engine air screen/fins.
Excessive vibration
12 Clean/replace muffler.
13 Check all wiring.
Engine continues to
run when operator
leaves seat with atta-
chment clutch engaged
14 See "To Adjust Carburetor" in
Service and Adjustments section.
Poor cut = uneven
cutting
15 Engine valves out of adjustment. 15
1 Worn, bent or loose blade.
2 Bent blade mandrel.
3 Loose/damaged part(s).
Mower blades will
not rotate
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.
31
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 Check wiring, switches and
connections. If not corrected,
contact a Sears or other
1
2
3
Replace blade. Tighten blade bolt
Level mower deck.
Clean underside of mower
housing.
Contact a Sears or other
qualified service center.
Clean around mandrels to
open vent holes.
1 Remove obstruction.
2 Replace mower drive belt.
3 Replace idler pulley.
4 Contact a Sears or other
qualified service center.