Troubleshooting - Craftsman 917.377912 Owner's Manual

6.75 horsepower 21" multi-cut power propelled rotary lawn mower
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CYLINDER
• Remove spark plug.
• Pour one ounce (29 ml) of oil through spark
plug hole into cylinder.
• Pull starter handle slowly a few times to
distribute oil.
• Replace with new spark plug.
OTHER
• Do not store gasoline from one season to
another.
• Replace your gasoline can if your can
starts to rust. Rust and/or dirt in your
gasoline will cause problems.
• If possible, store your unit indoors and
cover it to give protection from dust and dirt.
• Cover your unit with a suitable protective
cover that does not retain moisture. Do
not use plastic. Plastic cannot breathe
which allows condensation to form and will
cause your unit to rust.
IMPORTANT:
Never cover mower while
engine and exhaust areas are stillwarm.
_CAUTION:
Never store the lawn
mower with gasoline in the tank inside a
building where fumes may reach an open
flame or spark. Allow the engine to cool
before storing in any enclosure.
TROUBLESHOOTING
CHART
PROBLEM
_/ill not start
CAUSE
1.
Dirty air filter.
2.
Out of fuel.
3.
Stale fuel.
4.
Water in fuel.
Loss of power
Poor cut
- uneven
5.
Spark plug wire is disconnected.
6.
Bad spark plug.
7.
Loose blade or broken blade
adapter.
8.
Control bar in released
position
9.
Control bar defective
1.
Rear of lawn mower
housing/blade dragging
in heavy 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.
Low engine speed.
3.
Buildup of grass, leaves, and
trash under mower.
1.
Worn, bent or loose blade.
2.
Bent engine crankshaft.
Excessive
_ibration
CORRECTION
1.
Clean/replace
air filter.
2.
Fill fuel tank.
3.
Drain tank and refill with fresh
clean fuel.
_4. Drain fuel tank and carburetor
and refill tank with fresh gasoline.
5.
Connect wire to plug.
6.
Replace spark plug.
7.
Tighten blade bolt or replace blade
adapter.
8.
Depress control bar to handle.
9.
Replace control bar.
1.
Set in "Higher Cut" position.
2.
Set in "Higher Cut" position.
3.
Clean/replace air filter.
4.
Clean underside
of mower housing
5.
Check oil level.
6.
Cut at slower walking speed.
1.
Replace blade. Tighten blade bolt.
2.
Set engine speed control in fast
position.
3.
Clean underside of mower housin
1.
Replace blade. Tighten blade bolt.
2.
Contact an authorized service
center/department.
18

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