Ariens 911160-LM21 Classic Owner's Manual page 19

3.Check mower blade b alance.
Slide m ower blade o nanunthreaded
bolt. Abalanced blade should remain in
ahorizontal position. Ifeither end of
mower blade moves downward, sharpen
the heavy end until blade i sbalanced
(Figure 12).
4.Install mower blade o nunit.
5.Tighten the bolts t oatorque of37.5 -
50Ibf-ft (51-68 Nom).
Blade
Bolt
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
Figure 13
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