Poulan Pro 193732 Operator's Manual page 15

LAWN MOWER
Always observe safety rules when perform-
ing any main te nance.
TIRES
• Keep tires free of gasoline, oil, or insect
control chemi cals which can harm rubber.
• Avoid stumps, stones, deep ruts, sharp
objects and other hazards that may
cause tire damage.
BLADE CARE
For best results, mower blade must be kept
sharp. Re place a bent or dam aged blade.
CAUTION: Use only a replacement
blade approved by the manufacturer of
your mower. Using a blade not approved
by the manufacturer of your mower is
hazardous, could damage your mower and
void your warranty.
TO REMOVE BLADE
1. Disconnect spark plug wire from spark
plug and place wire where it cannot
come in contact with plug.
2. Turn lawn mower on its side. Make sure
air fi lter and carburetor are up.
3. Use a wood block between blade and
mower hous ing to prevent blade from
turning when re mov ing blade bolt.
NOTE: Protect your hands with gloves
and/or wrap blade with heavy cloth.
4. Remove blade bolt by turning counter-
clockwise.
5. Remove blade and attaching hard-
ware (bolt, lock wash er and hardened
wash er).
NOTE: Remove the blade adapter and
check the key inside hub of blade adapter.
The key must be in good condition to work
properly. Replace adapter if damaged.
TO REPLACE BLADE
1. Position the blade adapter on the en-
gine crank shaft. Be sure key in adapter
and crankshaft keyway are aligned.
2. Position blade on the blade adapter
aligning the two (2) holes in the blade
with the raised lugs on the adapter.
3. Be sure the trailing edge of blade (op-
posite sharp edge) is up toward the
engine.
4. Install the blade bolt with the lock wash-
er and hardened washer into blade
adapter and crankshaft.
5. Use block of wood between blade and
lawn mower housing and tighten the
blade bolt, turning clockwise.
• The recommended tightening torque is
35-40 ft. lbs.
IMPORTANT: Blade bolt is heat treated.
If bolt needs replacing, replace only with
approved bolt shown in the Repair Parts
section of this manual.
Blade adapter
Lockwasher
Blade
Blade
bolt
Hardened
washer
TO SHARPEN BLADE
NOTE: We do not recommend sharp en ing
blade - but if you do, be sure the blade is
balanced. An un bal anced blade will cause
eventual damage to lawn mower or engine.
• The blade can be sharp ened with a fi le
or on a grinding wheel. Do not attempt to
sharpen while on the mower.
• To check blade balance, drive a nail into
a beam or wall. Leave about one inch of
the straight nail ex posed. Place center
hole of blade over the head of the nail.
If blade is balanced, it should remain in
a horizontal position. If either end of the
blade moves downward, sharpen the
heavy end until the blade is balanced.
ENGINE
Read the maintenance section of your
engine manual.
LUBRICATION
Change the oil after the fi rst two hours of
operation and every 25 hours there af ter or
at least once a year if the lawn mower is
not used for 25 hours in one year. Refer to
engine manual.
TO CHANGE ENGINE OIL
(SEE ENGINE MANUAL)
• Be sure lawn mower is on level surface.
• Oil will drain more freely when warm.
• Catch oil in a suitable container.
• For engines without dipstick, re move
bottom oil drain plug.
• For engines with oil fi ll cap/dipstick,
remove bottom drain plug or remove en-
gine oil cap and turn mower on its side.
• After oil has drained completely, re place
oil drain plug and tighten se cure ly.
• Refi ll engine with oil. Pour slowly. Do
not overfi ll.
• Fill to top of slot inside of fi ller hole or
to "FULL" line on dipstick on models so
equipped. Keep oil at proper level.
15
Key Crankshaft
Trailing edge Crankshaft
keyway