General Lubrication; Check Spark Plug; Check Drive Belt; Change Engine Oil - Ariens 911160 – LM21 Classic Owner's/Operator's Manual

3. Check mower blade balance.
Slide mower blade on an unthreaded
bolt. A balanced blade should remain in
a horizontal position. If either end of
mower blade moves downward, sharpen
the heavy end until blade is balanced
(Figure 12).
4. Install mower blade on unit.
5. Tighten the bolts to a torque of 37.5 -
50 lbf-ft (51-68 N•m).
Blade
Bolt
OA0013
Figure 12

CHECK DRIVE BELT

(Self-Propelled Models)
Check drive belt and replace if worn or
damaged. See DRIVE BELT
REPLACEMENT on page 20.
CHECK FASTENERS
Check all fasteners for proper tightness. Pay
special attention to blade hardware and all
guards, shields and safety devices.
CHECK AIR CLEANER
See engine manual for specific information.

CHANGE ENGINE OIL

IMPORTANT: Change engine crankcase oil
after first five (5) hours of operation. Then
change oil after every 25 hours of operation.
Refer to engine manual for instructions and
proper oil type.
IMPORTANT: Proper oil level must be
maintained at all times or engine damage will
result. DO NOT overfill. Be sure engine is
level when adding oil.

GENERAL LUBRICATION

Swivel Wheels (911184)
See Figure 13.
Use Mix Hi-Temp Grease or equivalent on the
lube fittings. Order P/N: 00036800 - 3 pack of
3 oz. cartridges.
Lube Fitting

CHECK SPARK PLUG

Spark plug should be replaced every 100
hours of operation or each year.
NOTE: Loose spark plug wire terminals can
cause sparking. Replace terminal if
damaged.
CHECK ENGINE COOLING
WARNING: HOT SURFACES can
cause death or serious injury. DO
NOT TOUCH parts which are hot
from operation. ALWAYS allow
parts to cool.
To prevent overheating, air must circulate
freely around the cooling fins, cylinder head
and block.
Every 100 hours of operation or yearly (more
often if conditions require) remove blower
housing and clean cooling fins. See engine
manual for instructions.
CHECK MUFFLER
Check muffler for debris, cracks, wear, or
other damage.
CAUTION: Replace worn-out
mufflers immediately. Continued
use could result in fire or
explosion.
GB - 19
OM1282
Figure 13