Toro 72923 - Page 49

Servicing the Spark Plug(s)
Service Interval : Every 100 hours
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 .
T ype of Spark Plug: NGK
®
BPR4ES or equivalent
Air Gap: 0.75 mm (0.03 inch)
Removing the Spark Plug(s)
1. Park the machine on a level surface, disengage
the blade-control switch (PT O), and engage the
parking brake.
2. Shut of f 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 to
keep dirt and debris out of the engine.
4. Locate and remove the spark plug(s) as shown
in Figure 59 .
g009922
g027478
Figure 59
Checking the Spark Plug(s)
Important: Do not clean the spark plug(s).
Always replace the spark plug(s) when it has a
black coating, worn electrodes, an oily lm, 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).
g206628
Figure 60
Installing the Spark Plug(s)
g028109
Figure 61
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