Replacing The Drive Belt - Toro Power Clear 621 QZR Operator's Manual

4. Remove the 4 screws that secure the shroud (Figure 35).
Figure 35
1. Screw (4)
2. Shroud
5. Remove the fuel tank cap.
6. Remove the shroud (Figure 35).
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 0.030 inch (0.76 mm) (Figure
36).
Figure 36
1. Center electrode insulator
2. Side electrode
3. Spark plug
4. Spark-plug wire
3. Air gap (not to scale)
12. Install the spark plug and torque it to 20–22 ft-lb
(27–30 N-m).
13. Connect the wire to the spark plug.
Note: Ensure that the breather tube is routed above
the spark plug wire as shown in Figure 37.
1. Breather tube
14. Remove the fuel tank cap.
15. Install the shroud with the screws you removed in step
4.
Note: Ensure that the upper and lower shrouds fit
together in the side grooves.
16. Install the fuel tank cap.
17. Install the chute seal, the discharge chute, and the
discharge chute handle onto the machine using the
hardware you removed in step 3.
Note: The small screw goes through the small hole
in the chute seal at the front of the discharge chute
opening.

Replacing the Drive Belt

If drive belt becomes worn, oil-soaked, excessively cracked,
frayed, or otherwise damaged, replace the belt.
1. Remove the drive belt cover by removing the 3 bolts as
shown in Figure 38.
17
Figure 37
2. Carburetor drain bolt