Servicing The Spark Plugs - Toro 74312 Operator's Manual

Servicing the Spark Plugs

Service Interval: Every 200 hours—Check and gap
the spark plug (EFI engines only).
Every 500 hours—Check and gap the spark
plug (Non-EFI engines only).
Make sure that the air gap between the center and
side electrodes is correct before installing the spark
plugs. Use a spark-plug wrench for removing and
installing the spark plugs and a gapping tool/feeler
gauge to check and adjust the air gap. Install new
spark plugs if necessary.
Type for EFI engines: Champion
equivalent
Type for Non-EFI engines: Champion
equivalent
Air Gap: 0.76 mm (0.030 inch)
Removing the Spark Plugs
1. Move the speed-control lever to the N
position to stop the machine.
2. Disengage the PTO, engage the parking brake,
shut off the engine, and wait for all moving parts
to stop.
3. Remove the spark plugs.
A
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Figure 34
® XC12YC or
® RC12YC or
EUTRAL
B
Checking the Spark Plugs
Important:
Replace the spark plugs when they
have: a black coating, worn electrodes, an oily
film, cracks or reuse is questionable.
If you see light brown or gray on the insulator, the
engine is operating properly. A black coating on the
insulator usually means that the air cleaner is dirty.
Set the gap to 0.76 mm (0.030 inch).
A
Installing the Spark Plugs
Tighten the spark plugs to 24.4 to 29.8 N∙m (18 to 22
ft-lb).
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37
B
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Figure 35
Figure 36
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