Servicing The Spark Plug - Toro 44409 Operator's Manual

Figure 35
Note:
Ensure that the oil-filter gasket touches
the engine, then rotate the filter an extra 3/4 turn.
3. Fill the crankcase with the proper type of new
oil; refer to Engine-Oil Specifications (page

Servicing the Spark Plug

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(s) and a gapping tool/feeler gauge to
check and adjust the air gap. Install a new spark
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plug(s) if necessary.
Type: NGK® BPR4ES or equivalent
Air gap: 0.75 mm (0.03 inch)
Removing the Spark Plug
1. Park the machine on a level surface, disengage
the 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. Remove the spark plug as shown in
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27).
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 0.75 mm (0.03 inch).
30
Figure
Figure 36
36.
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