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Craftsman 917.25431 Operator's Manual page 30

21.0 hp 42" mower electric start automatic transmission
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TROUBLESHOOTING
CHART:
See appropriate section in manual unless directed to Sears service center
PROBLEM
CAUSE
CORRECTION
Poor cut = uneven
cutting
Mower blades will
not rotate
1
Worn, bent or loose blade.
2
Mower deck
not level.
3
Buildup
of grass,
leaves,
and
trash under mower.
4
Bent blade
mandrel.
Clogged
mower deck vent from
5
build-up
of grass,
leaves, and
trash around
mandrels.
1
Replace
blade. Tighten
blade
bolt.
2
Level mower
deck.
3
Clean
underside
of mower
housing.
4
Contact
a Sears or other
qualified
service
center.
Clean
around
mandrels
to
open vent holes.
1
Obstruction
in clutch
mechanism.
1
Remove
obstruction.
2
Worn/damaged
mower
drive belt.
2
Replace
mower drive belt.
3
Frozen
idler pulley.
3
Replace
idler pulley.
4
Frozen
blade
mandrel.
4
Contact
a Sears or other
qualified
service
center.
1
Engine
speed too slow.
1
Place throttle
control
in "FAST"
position.
2
Travel speed too fast.
2
Shift to slower speed.
3
Wet grass.
3
Allow grass
to dry before
mowing.
4
Mower deck
not level.
4
Level mower
deck.
5
Low/uneven
tire air pressure.
5
Check tires for proper
PSI.
6
Worn, bent or loose blade.
6
Replace/sharpen
blade. Tighten
blade
bolt.
7
Buildup
of grass,
leaves and
7
Clean
underside
of mower
trash under mower,
housing.
8
Mower drive belt worn.
8
Replace
mower drive belt.
9
Blades
improperly
installed.
9
Reinstall
blades
sharp edge down.
10
Improper
blades
used.
10
Replace
with blades
listed in
this manual.
11
Clogged
mower deck vent holes
11
Clean
around
mandrels
to
from buildup
of grass,
leaves,
and
open vent holes.
trash around
mandrels.
Headlight(s)
not
1
Light switch
is "OFF".
1
Turn light switch "ON".
working
(if so equipped)
2
Bulb(s)
or lamp(s)
burned
out.
2
Replace
bulb(s)
or lamp(s).
3
Faulty light switch.
3
Check/replace
light switch.
4
Loose or damaged
wiring.
4
Check wiring
and connections.
5
Blown fuse.
5
Replace
fuse.
30

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