Toro 38451 Operator's Manual page 15

Figure 32
4. Remove the 4 screws that secure the shroud
(Figure 33).
1. Screw (4)
2. Shroud
5. Remove the fuel tank cap.
G016327
6. Remove the shroud (Figure 33).
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 34).
1. Center electrode insulator
2. Side electrode
15
Figure 33
3. Spark plug
4. Spark-plug wire
Figure 34
3. Air gap (not to scale)