Toro MMX-655H-S Operator's Manual page 33

1. Spark plug
4. Clean around the spark plug.
5. Rotate the spark plug counterclockwise using
a 21 mm (13/16 inch) spark-plug wrench to
remove the plug and the sealing washer
44).
Checking the Spark Plug
Important:
Do not clean the spark plug. Always
replace the spark plug when it has a black coating,
worn electrodes, an oily film, or cracks.
Note:
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 0.7 to 0.8 mm (0.028 to 0.031 inch).
Figure 43
2. Wire
Figure 44
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(Figure
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33
Figure 45
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