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

Servicing the Spark Plug

Service Interval: Yearly—Check 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
1. Fuel-tank cap
2. Large screws (3)
3. Discharge chute
4. Remove the 4 screws that secure the shroud
(Figure 33).
Figure 33
4. Small screw
5. Chute seal
(Figure
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
34).
grit entering the cylinder can damage the engine.
11. Set the gap on the plug to 0.030 inch (0.76 mm) as
shown in Figure
1. Center-electrode insulator
2. Side electrode
12. Install the spark plug and torque it to 20 to 22 ft-lb
(27 to 30 N-m).
15
Figure 34
3. Spark plug
4. Spark-plug wire
(Figure 34).
35.
Figure 35
3. Air gap (not to scale)