Servicing The Spark Plugs - Toro 30074 Operator's Manual

Servicing the Spark Plugs

Service Interval: Every 100 hours—Check the spark plugs.
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 plugs and a
gapping tool/feeler gauge to check and adjust the air gap.
Install a new spark plugs if necessary.
Type: Champion® RCJ8Y or equivalent Air Gap: 0.75 mm
(0.030 inch)
Removing the Spark Plugs
1. Disengage the PTO and set the parking brake.
2. Stop the engine, remove the key, and wait for all moving
parts to stop before leaving the operating position.
3. Disconnect the wires from the spark plugs
1. Spark-plug wire/spark plug
4. Clean around the spark plugs to prevent dirt from
falling into the engine and potentially causing damage.
5. Remove the spark plugs and the metal washers.
Checking the Spark Plugs
1. Look at the center of the spark plugs
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.
2. If needed, clean the spark plug with a wire brush to
remove carbon deposits.
(Figure
Figure 35
(Figure
1. Center electrode insulator
2. Side electrode
Important: Always replace the spark plugs when
it has worn electrodes, an oily film on it, or has
cracks in the porcelain.
35). 3. Check the gap between the center and side electrodes
(Figure
gap is not correct.
Installing the Spark Plugs
1. Install the spark plugs and the metal washer. Ensure
that the air gap is set correctly.
2. Tighten the spark plugs to 22 N-m (16 ft-lb).
3. Connect the wires to the spark plugs
1
36). If
28
Figure 36
3. Air gap (not to scale)
36). Bend the side electrode (Figure 36) if the
(Figure 36).