Craftsman Rotary Lawn Mower 917.379120 Owner's Manual page 17

TROUBLESHOOTING - See appropriate section in manual unless directed
to a Sears Service Center.
PROBLEM
Loss of power 1. Rear of lawn mower
2. Cutting too much grass.
3. Dirty air fi lter.
4. Buildup of grass, leaves,
5. Too much oil in engine.
6. Walking speed too fast.
Poor cut – 1. Worn, bent or loose blade.
uneven
2. Wheel heights uneven.
3. Buildup of grass, leaves
Excessive 1. Worn, bent or loose blade.
vibration
2. Bent engine crankshaft.
Starter rope 1. Engine fl ywheel brake is on
hard to pull
2. Bent engine crankshaft.
3. Blade adapter broken.
4. Blade dragging in grass.
Grass catcher 1. Cutting height too low.
not fi lling 2. Lift on blade worn off.
(If so equipped) 3. Catcher not venting air.
Hard to push 1. Grass is too high or wheel
2. Rear of lawn mower
3. Grass catcher too full.
4. Handle height position not
Loss of drive 1. Belt wear.
or slowing of 2. Belt off of pulley.
drive speed 3. Drive cable worn or broken.
CAUSE
housing or cutting blade
dragging in heavy grass.
and trash under mower.
and trash under mower.
when control bar is released.
height is too low.
housing or cutting blade
dragging in grass.
right for you.
17
CORRECTION
1. Raise cutting height.
2. Raise cutting height.
3. Clean/replace air fi lter.
4. Clean underside of mower
housing.
5. Check oil level.
6. Cut at slower walking speed.
1. Replace blade. Tighten
blade bolt.
2. Set all wheels at same
height.
3. Clean underside of
mower housing.
1. Replace blade. Tighten
blade bolt.
2. Contact a Sears or other
qualifi ed service center.
1. Depress control bar to
upper handle before
pulling starter rope.
2. Contact a Sears or other
qualifi ed service center.
3. Replace blade adapter.
4. 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 lawn 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.