Servicing The Spark Plugs - Toro 74412 Operator's Manual

Figure 34
1. Oil lter
2. Rubber gasket
3. Pour new oil in through the center hole of the
filter. Fill it to the bottom of the threads.
4. Apply a thin coat of new oil to the rubber
gasket on the replacement filter (Figure 34).
5. 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 3/4 turn
(Figure 34).
6. Fill the crankcase with the proper type of new
oil; refer to Servicing the Engine Oil.
7. Run the engine for about 3 minutes, stop the
engine, and check for oil leaks around the oil
filter.
8. Check the engine oil level and add oil if needed.

Servicing the Spark Plugs

Service Interval/Specication
Check the spark plugs after every 100 operating
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 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:
0.030 inch (0.75 mm)
Removing the Spark Plugs
1. Disengage the PTO and set the parking brake.
3. Adapter
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
(Figure 35).
Figure 35
1. Spark-plug wire
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
(Figure 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. If needed, clean the spark plug with a wire
brush to remove carbon deposits.
Figure 36
1. Center electrode insulator
2. Side electrode
30
2. Spark plug
3. Air gap (not to scale)