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Replacing the Spark Plug
Check the spark plug after every 25 operating hours. Use a
Champion RC12YC 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. 10).
3. Clean around the spark plug.
4. Remove the spark plug from the cylinder head.
Important
Replace the spark plug if it is cracked,
fouled, or dirty, or the electrodes are worn or damaged. Do
not clean the electrodes because grit entering the cylinder
can cause engine damage.
5. Set the gap on the new plug to 0.020 in. (0.50 mm)
(Fig. 16).
1
Figure 16
1. 0.020 in. (0.50 mm)
6. Install the spark plug and the gasket seal.
7. Torque the plug to 15 ft-lb (20 Nm).
8. Connect the wire to the spark plug.
Adjusting the Wheel Drive
If the lawn mower does not self-propel or has a tendency to
creep forward when you disengage the wheel drive, adjust
the wheel traction control cable.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug (Fig. 10).
3. Loosen the nut on the support block (Fig. 17).
1. Nut
2. Support block
3. Top jam nut
4. Loosen the bottom jam nut on the wheel traction cable
(Fig. 17).
5. Lift the control bar until you feel some resistance. The
control bar should be 1-1/2 inches (4 cm) from the
handle when it is properly adjusted (Fig. 18).
986
1. 1-1/2 inches (4 cm)
6. Move the top jam nut up to increase or down to
decrease the clearance between the control bar and the
handle.
7. Tighten the bottom jam nut to lock the top jam nut
against the support block (Fig. 17).
8. Tighten the nut on the support block.
14
1
2
3
4
5
Figure 17
4. Bottom jam nut
5. Wheel traction cable
1
Figure 18
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