Servicing The Spark Plug - Toro Z Master Professional 5000 Series Operator's Manual

Servicing the Spark Plug

Service Interval: Every 200 hours—For Kohler
engines—check the spark plug(s).
Every 500 hours—For Kohler engines—replace
the spark plug(s).
Type: Champion XC12YC
Air Gap: 0.76 mm (0.03 inch)
Removing the Spark Plug
1. Park the machine on a level surface, disengage
the blade-control switch (PTO), and engage the
parking brake.
2. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3. Clean the area around the base of the plug(s) to
keep dirt and debris out of the engine.
4. Locate and remove the spark plug(s) as shown
in Figure 50.
Figure 50
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.
Set the gap to 0.76 mm (0.03 inch).
Installing the Spark Plug
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Figure 51
Figure 52
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