Toro Z Master Professional 5000 Series Operator's Manual page 38

4. Remove the spark plug.
G008803
Figure 53
5. Install the lefthand hydraulic unit shroud (Figure 52).
Checking the Spark Plug
Important: Never clean the spark plug(s). Always
replace the spark plug(s) when it has: a black coating,
worn electrodes, an oily film, or cracks.
If you see light brown or gray on the insulator, the engine is
operating properly. A black coating on the insulator usually
means the air cleaner is dirty.
Set the gap to 0.76 mm (0.030 inches).
1
Figure 54
2
G008794
Installing the Spark Plug
Tighten the spark plug(s) to 24.4-29.8 N-m (18-22 ft-lb).
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3
38
2
G015200
Figure 55