Craftsman 917.377521 Owner's Manual page 17

PROBLEM
Loss of power
TROUBLESHOOTING CHART
CAUSE
o Rear of lawn mower housing
or cutting blade dragging
in heavy grass.
o Cutting too much grass_
, ,, ,,,,, ,i ,,, , ,,,,,,,,, : ......
Poor cut- uneven
Excessive
vibration
Starter rope hard
to pull
Grass catcher
not filling (if so
equipped)
Hard to push
o Dirty air filter_
, Buildup of grass, leaves,
and trash under mower.
° Too much oil in engine.
o Walking speed too fast.
• Worn, bent or loose blade_
° Wheel heights uneven.
, Buildup of grass, leaves
and trash under mower.
L ,JJ, ......
o Worn, bent or loose blade.
° Bent engine crankshaft.
o Engine flywheel brake is on
when control bar is released.
o Bent engine crankshaft.
o Blade adapter broken,
° Blade dragging in grass,
° Cutting height too low.
° Lift on blade worn off.
° Catcher not venting air.
° Grass is too high or wheel
height is too low,
o Rear of lawn mower
housing or blade dragging
in grass,
o Grass catcher too full
° Handle height position not
right for you.
CORRECTION
o Set to "Higher Cut"
position°
O
°
o
o
Set to "Higher CL_'
position,
C_ean/rep_ace air filter,
Clean underside of mower
housing.
Check oil level.
Cut at slower walking
speed,
° Replace blade. Tighten
blade bolts
° Set all wheels at same
height
o Clean underside of
mower housing.
° Replace blade. Tighten
blade bolto
o Contact an authorized
service center.
o Depress control bar to
upper handle before
pulling starter rope.
° Contact an authorized
service center.
° Replace blade adapter,
° Move lawn mower to cut
grass or to hard surface
to start engine.
° Raise cutting height.
° Reptace btade.
• Clean grass catcher.
Raise cutting height.
° Raise rear of lawn mower
housing one (1) setting
higher.
° Empty grass catcher.
° Adjust handle height to
suit.
t7