Toro Spray Master Operator's Manual page 57

Checking the Spark Plug
Spark-plug gap: 0.76 mm (0.030 inch)
Important:
Do not 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.
Use a gapping tool/feeler gauge to check and adjust
the air gap to 0.76 mm (0.030 inch).
Figure 79
Installing the Spark Plug
1. Tighten the spark plug as follows:
•
New spark plug—12 to 15 N∙m (8.7 to 10.8
ft-lb)
•
In-service spark plug—23 to 27 N∙m (16.6
to 19.5 ft-lb)
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2. Close and secure the left and right spray tanks;
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refer to Closing the Tanks (page
57
Figure 80
Figure 81
51).
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