17
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. 7).
3. Clean around the spark plug and remove it 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.
4. Set the gap on the new plug to 0.030 in. (0.76 mm)
(Fig. 19).
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1
Figure 19
1.
0.030 in. (0.76 mm)
5. Install the spark plug and the gasket seal.
6. Torque the spark plug to 15 ft-lb (20 N
m).
7. Connect the wire to the spark plug.
Adjusting the Self-propel Drive
Cable
Whenever you change the handle height, install a new
self-propel cable, or the traction drive belt slips, 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 (Fig. 21).
281
1
2
Figure 21
1.
Belt cover
2.
Bolts
5. Push the drive bracket down until it contacts the lawn
mower, then hold it in place (Fig. 22).
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1
2
Figure 22
1.
Drive bracket
2.
Push here
6. Pull the cable jacket down (toward the lawn mower) to
remove all the slack in the cable (Fig. 20).
7. While holding the cable jacket down, release the drive
bracket and tighten the nut on the cable support
(Fig. 20).
8. Install the belt cover.