Toro Titan MR4800 Operator's Manual page 47

Servicing the Spark Plug (continued)
Checking the Spark Plug
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.
Set the gap to 0.75 mm (0.03 inch).
Installing the Spark Plug
3464-659A
G437139
IMPORTANT
G437150
g027661s
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