Servicing The Spark Plug - Toro Power Clear 721 QZE Operator's Manual

Servicing the Spark Plug

Service Interval: Yearly—Service the spark plug and
replace it if necessary.
Use a NGK BPR6ES or Champion RN9YC spark
plug or equivalent.
1. Shut off the engine and wait for all moving parts
to stop.
2. Rotate the discharge chute so that it faces
forward.
3. Remove the discharge chute, the
discharge-chute handle, and the chute
seal by removing the 3 large screws and 1 small
screw (Figure 29).
Figure 29
1. Fuel-tank cap
2. Large screws (3)
3. Discharge chute
4. Remove the 4 screws that secure the shroud
(Figure 30).
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4. Small screw
5. Chute seal
1. Screw (4)
2. Shroud
5. Remove the fuel-tank cap.
6. Remove the shroud
7. Install the fuel-tank cap.
8. Disconnect the wire from the spark plug.
9. Clean around the spark plug.
10. 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 can
damage the engine.
11. Set the gap on the plug to 0.76 mm (0.030 inch)
as shown in Figure
1. Center-electrode insulator
2. Side electrode
14
Figure 30
3. Spark plug
4. Spark-plug wire
(Figure 30).
31.
Figure 31
3. Air gap (not to scale)
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