Servicing The Spark Plug(S) - Toro 74412 Operator's Manual

2. Remove the old filter and wipe the filter adapter
(Fig. 34) gasket surface.
1
Figure 34
1. Oil filter
2. Gasket
3. Pour new oil in through the center hole. Stop pouring
the oil when it reaches the bottom of the threads.
4. Allow the filter material to absorb the new oil for 1 to
2 minutes.
5. Apply a thin coat of new oil to the rubber gasket on the
replacement filter (Fig. 34).
6. Install the replacement oil filter to the filter adapter.
Turn the oil filter clockwise until the rubber gasket
contacts the filter adapter; then tighten the filter an
additional 1/2 turn (Fig. 34).
7. Fill the crankcase with the proper type of new oil; refer
to Servicing the Engine Oil on page 29.

Servicing the Spark Plug(s)

Service Interval/Specification
Check the spark plug(s) after every 200 operating hours.
Ensure that the air gap between the center and side
electrodes is correct before installing the spark plug(s). 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 if necessary.
®
Type: Champion RC12YC or equivalent
Air Gap: 0.030 inch (0.76 mm)
Removing the Spark Plug(
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
2
m–1256
3. Adapter
s)
31
3. Disconnect the wire(s) from the spark plug(s) (Fig. 35).
Figure 35
1. Spark-plug wire
4. Clean around the spark plug(s) to prevent dirt from
falling into the engine and potentially causing damage.
5. Remove the spark plug(s) and the metal washer(s).
Checking the Spark Plug(s)
1. Look at the center of the spark plug(s) (Fig. 36). 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.
2
1
Figure 36
1. Center electrode insulator
2. Side electrode
Important 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. 36).
Note: Bend the side electrode (Fig. 36) if the gap is not
correct.
2
1
1218
2. Spark plug
3
0.030 inch
(0.76 mm)
3. Air gap (not to scale)