Servicing The Spark Plug - Toro BC-25 Operator's Manual

11. Remove the oil fill cap and slowly pour approximately
80% of the specified amount of oil in through the valve
cover (Figure 9).
12. Check the oil level; refer to
Checking the Engine Oil Level (page 12).
13. Slowly add additional oil to bring the level to the F
(full) mark on the dipstick.
14. Replace the fill cap.

Servicing the Spark Plug

Service Interval: Every 200 hours—Check the spark plugs.
Every 500 hours
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 plug and a
gapping tool/feeler gauge to check and adjust the air gap.
Install a new spark plug if necessary.
Type: Champion XC12YC (RFI type) or equivalent
Air Gap: 0.030 inch (0.76 mm)
Removing the Spark Plug
1. Pull the wires off of the spark plugs (Figure 22).
Figure 22
1. Spark plug wire
2. Clean around spark plugs.
3. Remove the spark plugs and the metal washers.
2. Spark plug
Checking the Spark Plug
1. Look at the center of the spark plug (Figure 23). 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.
Important: Never clean the spark plug. Always
replace the spark plug when it has a black coating,
worn electrodes, an oily film, or cracks.
1. Center electrode insulator
2. Side electrode
2. Check the gap between the center and side electrodes
(Figure 23). Bend the side electrode (Figure 23) if the
gap is not correct.
Installing the Spark Plug
1. Thread the spark plug into the spark plug hole.
2. Tighten the spark plug to 18–22 ft-lb (24.4–29.8 N-m).
3. Push the wire onto the spark plug.
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Figure 23
3. Air gap (not to scale)