Craftsman 917.378921 Owner's Manual page 18

TROUBLESHOOTING
- See
appropriate
section in manual unless directed
to a Sears Parts & Repair Center.
PROBLEM CAUSE CORRECTION
Loss of power 1 Rear of mower housing or 1. Raise cutting height.
2. Raise cutting height.
3. Clean/replace air filter,
4. Clean underside of mower
housing.
5. Check oil level.
6. Cut at slower walking speed.
Poor cut- 1. Replace blade. Tighten
uneven blade bolt.
2. Set all wheels at same
height.
3. Clean underside of
mower housing.
Excessive 1. Replace blade. Tighten
vibration blade bolt.
2. Contact a Sears or other
qualified service center.
1.
blade dragging in grass.
2 Cutting too much grass.
3. Dirty air filter,
4. Buildup of grass, leaves.
and trash under mower.
5. Too much oil in engine.
6. Walking speed too fast.
1. Worn, bent or loose blade.
2. Wheel heights uneven.
3. Buildup of grass, leaves
and trash under mower.
1. Worn, bent or loose blade.
2. Bent engine crankshaft.
Engine flywheel brake is on
when control bar is released.
Bent engine crankshaft.
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.
Rear of mower housing or
blade dragging in grass.
Grass catcher too full.
Handle height position not
right for you.
Belt wear.
Belt off of pulley,
Drive cable worn or broken.
"Loose" drive control system.
Starter rope 1
hard to pull
2
3,
4
Grass catcher 1.
not filling 2
(If so equipped) 3
Hard to push 1
2
3,
4.
Loss of drive 1
or slowing of 2
drive speed 3
4.
2.
3.
4.
Depress control bar to
upper handle before
pulling the starter rope.
Contact a Sears or other
qualified service center.
Replace blade adapter.
Move lawn mower to cut
grass or to hard surface.
1. Raise cutting height.
2. Replace blade.
3. Clean grass catcher.
1. Raise cutting height.
2. Raise rear of mower housing
one (1) setting higher.
3. Empty grass catcher,
4. Adjust handle height to suit.
1. Check/replace drive belt.
2. Check/reinstall drive belt.
3. Replace drive cable.
4. Adjust drive control.
18