Servicing The Spark Plug(S) - Toro TX 427 Operator's Manual

Servicing the Spark Plug(s)

Service Interval: Every 200 hours—Check the spark
plug(s).
Every 500 hours—Replace the spark plug.
Ensure that the air gap between the center and side
electrodes is correct before installing each spark plug.
Use a spark-plug wrench for removing and installing
each spark plug and a gapping tool/feeler gauge to
check and adjust the air gap. Install new spark plugs
if necessary.
Type: Champion XC12YC or equivalent.
Air Gap: 0.75 mm (0.03 inch)
Removing the Spark Plug
1. Park the machine on a level surface, engage
the parking brake (if equipped), and lower the
loader arms.
2. Shut off the engine, remove the key, and allow
the engine to cool.
3. Clean the area around the base of the plug(s) to
keep dirt and debris out of the engine.
4. Remove the spark plug(s) as shown in
39.
Figure 39
Checking the Spark Plug
Important:
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
Figure
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30
Do not clean the spark plug(s).
Figure 40
Figure 41
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