Craftsman 917.378450 Owner's Manual page 17

TROUBLESHOOTING - See appropriate section in manual unless directed
to a Sears Service Center.
PROBLEM CAUSE
Loss of power 1. Rear of lawn mower
Poor cut -
uneven
Excessive
vibration
Starter rope
hard to pull
CORRECTION
1. Set to "Higher Cut"
position.
.
3.
4.
5.
6.
1.
2.
3.
housing or cutting blade
dragging in heavy grass.
2. Cutting too much grass.
3. Dirty airfitter.
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.
1. Engine flywheel brake is on
when control bar is released.
2. Bent engine crankshaft.
3. Blade adapter broken.
4. 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.
2. Rear of lawn mower
housing or cutting blade
dragging in grass.
3. Grass catcher too full.
4. Handle height position not
right for you.
1. Belt wear.
2. Belt off of pulley.
3. Drive cable worn or broken.
4. Dirt in drive pinions.
Set to "Higher Cut"
position.
Clean/replace air filter.
Clean underside of mower
housing.
Check oil level.
Cut at slower walking speed
Replace blade. Tighten
blade bolt.
Set all wheels at same
height.
Clean underside of
mower housing.
1. Replace blade. Tighten
blade bolt.
2. Contact a Sears or other
qualified service center.
1. Depress control bar to
upper handle before
pulling starter rope.
2. Contact a Sears or other
qualified service center.
3. Replace blade adapter.
4. Move lawn mower to cut
grass or to hard surface.
Grass catcher 1. 1. Raise cutting height.
notfilling 2. 2. Replace blade.
(If so equipped) 3. 3. Clean grass catcher.
Hard to push 1. 1. Raise cutting height.
Loss of drive
or slowing of
drive speed
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.
4. Clean drive pinions.
17