Servicing The Spark Plugs - Toro 74310 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
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 neutral position
to stop the machine.
2. Disengage the PTO, engage the parking brake, stop the
engine, and wait for all moving parts to stop.
3. Remove the spark plugs.
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).
® XC12YC or equivalent
®
RC12YC or
Figure 36
1
Installing the Spark Plugs
Tighten the spark plugs to 24.4 to 29.8 N-m (18 to 22 ft.-lb).
1
3
33
2
G008794
Figure 37
2
G015200
Figure 38