Servicing The Spark Plug - Toro TimeCutter HD X4850 Operator's Manual

Figure 48
7. Dispose of the used oil at a recycling center.

Servicing the Spark Plug

Service Interval: Every 100 hours/Yearly (whichever
comes first)—Check the spark
plug(s).
Every 200 hours/Every 2 years (whichever
comes first)—Replace 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: Champion ® RN9YC or NGK
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 to
keep dirt and debris out of the engine.
4. Remove the spark plug
g235264
® BPR6ES
(Figure 49).
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).
Installing the Spark Plug
36
Figure 49
Figure 50
Figure 51
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