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24
ENGINE
CARBURETOR
The carburetor has been preset at the fac-
tory and ad just ment should not be neces-
sary. However, minor ad just ment may be
required to compensate for differences in
fuel, temperature, altitude or load.
• The air fi lter must be assembled to the
car bu re tor when running engine.
• Best carburetor adjustment is obtained
when fuel tank is 1/4 full.
• In order for the engine to run, the operator
presence control bar must be held in the
operating position. There fore, and assis-
tant will be required to hold the control bar
in the operating position when making fi nal
adjustment to the car bu re tor.
See the adjustment section of your engine
manual for further instructions.
Front
hook
Clutch frame
• When reinstalling the belt cover be sure
the front hook is under clutch frame.
Reinstall in rear of cover.
DRIVE BELT ADJUSTMENT (FRONT
WHEEL BELT DRIVE MODELS ONLY)
A misadjusted belt will wear faster. Be
sure to keep belt properly adjusted.
• After prolonged use and drive belt wear,
if the clutch lever has reached the top of
the slot in the clutch frame and the belt
is still loose, move adjustable idler pulley
to upper hole in clutch frame.
NOTE: When installing a new belt,
adjustable idler pulley must be returned
to lower hole (original position) in clutch
frame.
REAR WHEEL GEAR DRIVE
• Disconnect spark plug wire from spark
plug and place wire where it cannot
come in contact with spark plug.
• Remove screws retaining drive cover
(not shown); and remove drive cover
from lawn mower housing.
• Remove drive cable from anchor, then
detach spring from idler arm assembly.
• Remove idler arm assembly from hous-
ing by removing hex nut; then remove
drive belt from drive pulley, belt keepers
and idler arm assembly.
• Turn lawn mower on its side. Make sure
air fi lter and carburetor are up.
• 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.
• Remove blade bolt.
• Remove blade, attaching hardware (bolt,
lock wash er, hardened wash er), blade
adapter and debris shield. Note that the
debris shield has a tab which fi ts into the
housing hole.
• Remove drive belt from engine pulley;
discard old belt.
• Install new belt by reversing above steps.
NOTE: Always use factory approved belt to
assure fi t and long life.
• The recommended tightening torque is
35-40 ft. lbs.
IMPORTANT: Blade bolt is grade 8 heat
treated.
Trailing edge
Crankshaft
Debris shield
Blade
adapter
Hardened
washer
Lock-washer
Blade
bolt
Tab
Housing hole
Drive cable anchor
Idler arm
assembly
Belt
keepers
Drive
pulley
Housing
hole
Hex
nut
Drive belt