Toro Z Master 75990 Operator's Manual page 43

Figure 54
1. Pull this tab out to the
side in the direction of the
arrow
2. Pull the shroud off of this
frame tab in the direction
of the arrow
4. Remove the spark plug.
Figure 55
5. Install the left hydraulic-unit shroud
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3. Pull the shroud off of this
frame tab in the direction
of the arrow
4. Shroud
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(Figure 54).
Checking the Spark Plugs
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 that the air cleaner is dirty.
Set the gap to 0.76 mm (0.030 inch).
43
Figure 56
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