16
Replacing the Air Filter
Replace the air filter every season or every 25 operating
hours; replace it more frequently under dusty operating
conditions.
Important
Do not operate the engine without the air
filter element; extreme engine damage will occur.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug (Fig. 8).
3. Loosen the screw that secures the air cleaner cover
(Fig. 18).
4. Tilt the cover down and clean it thoroughly (Fig. 18).
1003
1
2
3
Figure 18
1.
Air filter
2.
Screw
3.
Cover
5. Remove the paper air filter and discard it (Fig. 18).
Important
Do not try to clean the paper air filter.
6. Insert a new paper air filter (Fig. 18).
7. Install the air filter cover and secure it with the screw.
8. Connect the wire to the spark plug.
Servicing the Spark Plug
Check the spark plug after every 25 operating hours. Use a
Champion RJ19LM 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. 8).
3. Clean around the spark plug.
4. Remove the spark plug from the cylinder head.
Important
Replace a cracked, fouled, or dirty spark
plug. Do not clean the electrodes because grit entering the
cylinder could damage the engine.
5. Set the gap on the new plug to 0.030 in. (0.76 mm)
(Fig. 19).
986
1
Figure 19
1.
0.030 in. (0.76 mm)
6. Install the spark plug and the gasket seal.
7. Torque the spark plug to 15 ft-lb (20 N
m).
8. Connect the wire to the spark plug.
Adjusting the Self-propel Drive
Cable
If the top speed begins to slow on the lawn mower, adjust
the self-propel drive cable.
1. Stop the engine and wait for all moving parts to stop.
2. Pull the upper handle back as far as possible.
3. Loosen the cable support nut (Fig. 20).
m–4205
1
2
3
4
Figure 20
1.
Cable jacket
2.
Cable support
3.
Nut
4.
Upper handle
4. Remove the belt cover.
Summary of Contents for 20833
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