10
•
When adding oil, the unit must be laid back in
the horizontal position on a flat surface with
the upper handle touching the ground.
See Figure 8.
•
Refill the crankcase with 3.4 fl.oz. (100 ml.) of
SAE 30 SF, SG, or SH oil.
•
Replace the oil fill plug/dipstick.
Air Filter Maintenance
•
Open the air filter cover on side of engine by
pushing the tab on the left side in and swinging
the air filter cover out and off. See Figure 10.
•
Remove the air filter and screen.
•
Wash the filter in detergent and water. Rinse the
filter thoroughly and allow it to dry.
•
Apply enough clean SAE 30 motor oil to lightly
coat the filter and squeeze the filter to spread and
remove excess oil.
•
Replace the screen and filter.
•
Position the hooks on the right side of the air filter
cover into the slots at the right side of the air filter
housing.
•
Swing the cover to the left until the tab on the air
filter cover snaps into place in the slot.
Figure 10
Carburetor Adjustment
If the engine will not idle, hesitates or stalls on
acceleration, or there is a loss of engine power have
the carburetor adjusted by an Sears service center.
Replacing The Spark Plug
The spark plug should be removed and check after
every 25 hours of operation. To replace the spark
plug proceed as follows:
Air Filter
Air Filter Cover
Tab
Screen
Air Filter
Housing
Air Filter
•
Stop the engine and allow it to cool. Grasp the
plug wire firmly and pull the cap from the spark
plug.
•
Clean dirt from around the spark plug and
remove the spark plug from the cylinder head by
turning counterclockwise using a socket.
•
Set the air gap at 0.025 in (0.655 mm.) using a
feeler gauge. See Figure 11.
•
Install a correctly gapped spark plug in the
cylinder head and tighten by turning the socket
clockwise until snug. Do not over tighten.
Figure 11
Spark Arrestor Maintenance
•
Remove the muffler cover, if equipped, by
pressing down on the corner with a flat blade
screwdriver. Slide the notches on the sides of the
muffler cover over the tabs on the engine cover
and remove.
•
Remove the screw attaching the spark arrestor
cover to the muffler. See Figure 12.
Figure 12
•
Pull the tab on the spark arrestor cover out of the
muffler and remove the spark arrestor cover.
•
Remove the spark arrestor screen from the spark
arrestor cover.
•
Clean the spark arrestor screen with a wire brush
or replace screen.
•
Reinstall the spark arrester screen, spark
arrestor cover, and screw.
Rocker Arm Clearance
This requires disassembly of the engine. If you feel
unsure or unqualified to perform this adjustment, take
the unit to a Sears service center.
NOTE: Inspect the valve to rocker arm clearance with
a feeler gauge after the first 10 hours of operation
Spark Plug
.025" Feeler Gauge
Muffler
Slot
Spark Arrestor
Screen
Tab
Spark Arrester
Cover
Screw
