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Customer Responsibilities
CHECK THE SPARK PLUG
A. Stop the engine and make sure that all moving
parts have come to
a
complete stop. Disconnect the
spark plug wire and secure it away from the spark
plug.
B. Clean the area around the spark plug to prevent
debris from falling into the spark plug hole.
C. Remove and inspect the spark plug. Check the
electrode gap with a wire feeler gauge and set the gap at
.030", if necessary.
D. Install spark plug and tighten securely.
CARBURETOR AND IGNITION SYSTEM
INFORMATION
o
The factory-adjusted carburetor settings should be
satisfactory for most conditions. If you feel that an
adjustment is needed, contact your local Sears Service
Center or retail store.
o
The engine is equipped with an electronic ignition
system without points and a condenser. Only spark plug
maintenance is required. If the ignition system is not
functioning properly, contact your local Sears Service
Center or retail store.
Electrodes
' "
Figure 24: Spark plug.
CHECK BOLTS AND NUTS FOR TIGHTNESS
Be sure that the bolts and nuts on your machine are
always securely tightened.
With the engine shut off
and the spark plug wire disconnected,
check the bolts
and nuts before each use of the machine. Refer to the
Parts List at the back of this Manual for replacement
hardware. Do not overtighten bolts. See the Torque
Specifications Chart on Page 27.
LUBRICATION
With the exception of the engine, the machine is lifetime
lubricated. Do not oil or grease any part of the machine.
CAUTION
Do not tamper with the engine governor which is
factory set for proper engine speed. Overspeeding
the engine above the factory high speed selling can
be dangerous and will void the engine warranty.
Request authorized service if the problem persists.
REPLACE THE CHIPPER CUTTING BLADE
Over time, the chipper cutting blade edge (A in Figure 27
on Page 27) will dull. Sharpen or replace the blade
when the chipper no longer cuts efficiently.
o
Discard a cracked or severely nicked blade because
the blade could break apart and cause personal injury.
o
Sharpen a blade that is dull or that has only minor
nicks. The blade is made from tempered steel and is
extremely hard - do not attempt to sharpen with a hand
file. We recommended that you take the blade to a
professional sharpening service
for expert
sharpening. All grinding must be flat and uniform along
the beveled edge of the blade to maintain the original
45
0
cutting angle.
IMPORTANT: Do not reuse the blade mounting screws
and locknuts. New screws and locknuts are supplied
with a new blade.
Use only factory-supplied
hardware. Do not use substitutes or failure of the
equipment
or
personal injury could result.
See the
Parts List at the back of this Manual to order individual
replacement screws and locknuts if re-installing the old
blade.
25
To Remove and Replace the Blade
A. Stop the engine and make sure that all moving
parts have come to
a
complete stop. Disconnect the
spark wire and secure it away from the spark plug.
B. Remove the collection bag or the blower deflector.
C. The blade removal procedure requires removal of the
engine. To avoid a potential safety hazard from spilled
gasoline, the fuel tank must be emptied of all gasoline
before the engine is removed. Follow Steps C-1 through
C-4 to empty the fuel tank.
1. Place a clean pan below the fuel tank to catch the
gasoline as it drains. Remove gas cap from fuel tank.
DANGER
Gasoline and its vapors are highly flammable and
explosive.
To avoid serious personal injury, be sure area is
well ventilated and keep gasoline away from open
flame or sparks. Observe no smoking rules at all
limes. Use an approved fuel container.
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