Figure 38
1.
Center electrode insulator
2.
Side electrode
3.
Air gap (not to scale)
6. Install the spark plug and the gasket seal by hand.
7. Tighten the plug 1/2 turn after the spark plug seats
to compress the washer.
Note:
When installing the original spark plug again,
tighten 1/8 to 1/4 turn after the spark plug seats to
compress the washer.
Note:
Under-tightening the spark plug can cause
the plug to become very hot and can damage the
engine. Overtightening the spark plug can damage
the threads in the engine cylinder head.
8. Connect the wire to the spark plug.
Drive System
Maintenance
Adjusting the Self-propel Drive
Cable
Whenever you install a new self-propel cable or if
the self-propel drive is out of adjustment, adjust the
self-propel drive cable.
1. Loosen the cable support nut (Figure 39).
Figure 39
1.
1 to 1-1/2 inches (25 to 38
mm)
4.
Cable support nut
2.
Self-propel drive bar
5.
Cable support
3.
Cable jacket
2. Hold the self-propel bail 1 to 1-1/2 inches (25 to 38
mm) from the handle (Figure 39).
3. Pull down the cable jacket (toward the mower) until
there is no slack in the cable (Figure 39).
4. Tighten the nut on the cable support.
5. Release the self-propel drive bar and ensure that the
cable is loose.
Note:
The cable must be loose with the self-propel
drive bar in the released position; otherwise, the
machine may creep when you disengage the bar.
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