Servicing The Spark Plug - Toro 74143 Operator's Manual

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3
6
5
Figure 41
Note: Ensure the oil filter gasket touches the engine
and then an extra 3/4 turn is completed.
3. Fill the crankcase with the proper type of new oil; refer
to Changing the Oil.
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4
3/4
G008748

Servicing the Spark Plug

Service Interval: Every 100 hours
Make sure 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
G008804
gapping tool/feeler gauge to check and adjust the air gap.
Install a new spark plug(s) if necessary.
Type of Spark Plug: NGK
Air Gap: 0.030 inch (0.75 mm)
Removing the Spark Plug
1. Stop the engine, remove the key, and wait for all moving
parts to stop before leaving the operating position.
2. Disengage the PTO, move the motion control levers to
the neutral locked position and set the parking brake.
3. Locate and remove the spark plugs (Figure 42).
Checking the Spark Plug
Important: Never 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 0.030 inches (0.76 mm).
33
® BPR4ES or equivalent
g015124
Figure 42