Servicing The Spark Plug - Toro 23521 Operator's Manual

5. Dispose of the used oil at a recycling center.

Servicing the Spark Plug

Service Interval: Yearly—Change the spark plug(s).
Ensure that the air gap between the center and side
electrodes is correct before installing the spark plug.
Use a spark plug wrench for removing and installing
the spark plug and a gapping tool or feeler gauge to
check and adjust the air gap. Install a new spark plug
if necessary.
Type: Briggs and Stratton
XC92YC
Air gap: 0.76 mm (0.03 inch)
Removing the Spark Plug
1. Park the machine on a level surface, shut off the
engine, wait for all moving parts to stop, and
remove the key from the ignition switch before
leaving the operating position.
2. Clean the area around the base of the plug to
keep dirt and debris out of the engine.
3. Remove the spark plug.
Figure 23
® 491055 or Champion
Checking the Spark Plug
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.
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Set the gap to 0.75 mm (0.03 inch).
Installing the Spark Plug
®
19
Figure 24
Figure 25
Figure 26
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