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Adjusting the Self-propel Drive
If the lawn mower does not self-propel or has a tendency
to creep forward when the control bar is more than 1-1/2
inches (3.8 cm) from the handle, adjust the wheel drive
control knob on the rear of the gear box.
1. Close the door in the lawn mower housing and remove
the grass bag.
2. Rotate the control knob clockwise !/2 turn if the lawn
mower does not self-propel. If the lawn mower creeps
forward, rotate the knob !/2 turn counterclockwise to
loosen the belt (Fig. 33).
Figure 33
1. Control knob
3. Slowly pull the lawn mower backward while you
gradually move the control bar toward the handle.
Note: The adjustment is correct when the rear wheels stop
turning and the control bar is about one inch (2.5 cm)
from the handle (Fig. 34).
1
Figure 34
1. One inch (2.5 cm)
Servicing the Spark Plug
Check the spark plug after every 100 operating hours. Use
an NGK BPR5ES spark plug or equivalent.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug (Fig. 11).
3. Clean around the spark plug.
4. Remove the spark plug from the cylinder head.
Important
plug. Do not clean the electrodes because grit entering the
cylinder can damage the engine.
5. Set the gap on the plug to 0.030 in. (0.76 mm)
(Fig. 35).
1
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1. 0.030 in. (0.76 mm)
6. Install the spark plug and the gasket seal.
7. Torque the plug to 17 ft-lb (23 Nm).
8. Connect the wire to the spark plug.
Changing the Oil Filter
Replace the oil filter (Fig. 36) after every 100 operating
hours or yearly, whichever comes first.
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1. Oil filter
1. Run the engine to warm the oil.
22
Replace a cracked, fouled, or dirty spark
1
Figure 35
1
2
Figure 36
2. Fuel line
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