Spark Plug - Toro 74601 Operator's Manual

Spark Plug

Check the spark plug(s) after every 200 operating hours.
Make sure 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(s) and a gapping tool/feeler gauge to check and adjust
the air gap. Install a new spark plug(s) if necessary.
Type: Champion RC12YC (or equivalent)
Air Gap: 0.030 in. (0.76 mm)
Removing the Spark Plug
1. Disengage the PTO, set the parking brake, stop the
engine, and remove the key.
2. Pull the wire(s) off the spark plug(s) (Fig. 32). Clean
around the spark plug(s) to prevent dirt from falling into
the engine and potentially causing damage.
3. Remove the spark plug(s) and metal washer.
1
Figure 32
1. Spark plug wire
(s)
2
m–5141
2. Spark plug
28
Checking the Spark Plug
1. Look at the center of the spark plug(s) (Fig. 33). 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.
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.
2. Check the gap between the center and side electrodes
(Fig. 33). Bend the side electrode (Fig. 33) if the gap is
not correct.
2
1
Figure 33
1. Center electrode insulator
2. Side electrode
Installing the Spark Plug
1. Install the spark plug(s). Make sure that the air gap is
set correctly.
2. Tighten the spark plug(s) to 30 ft.-lb. (41 N m).
3. Push the wire(s) onto the spark plug(s) (Fig. 32).
3
0.030 in.
(0.76 mm)
m–3215
3. Air gap (not to scale)
(s)