•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.
Air Filter | Air Filter | |
Housing | ||
| ||
| Air Filter Cover | |
Screen |
| |
Air Filter |
| |
| Tab |
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:
•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.
.025" Feeler Gauge |
Spark Plug |
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.
| Spark Arrestor | |
Muffler | Screen | Screw |
|
| |
|
| Tab |
| Slot | Spark Arrester |
|
| Cover |
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
10
