Servicing The Spark Plug - Toro 74255 Operator's Manual

Figure 41
1. Oil lter
2. Gasket
3. Pour new oil of the proper type in through the
center hole. Stop pouring when the oil reaches
the bottom of the threads. Allow a minute or
two for the oil to be absorbed by filter material.
4. Apply a thin coat of new oil to the rubber
gasket on the replacement filter (Figure 41).
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 1/2 turn
(Figure 41).
6. Fill the crankcase with the proper type of new
oil; refer to Changing the Oil.

Servicing the Spark Plug

Check the spark plug(s) after every 200 operating
hours. Make sure 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 inch (0.75 mm)
Removing the Spark Plug
1. Disengage the PTO, move the motion control
levers to the neutral locked position 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. Pull the wire(s) off the spark plug(s) (Figure 42).
3. Adapter
Figure 42
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 metal washer.
Checking the Spark Plug
1. Look at the center of the spark plug(s)
(Figure 43). 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.
Figure 43
1. Canter electrode insulator
2. Side electrode
2. Check the gap between the center and side
electrodes (Figure 43). Bend the side electrode
(Figure 43) if the gap is not correct.
Installing the Spark Plug
1. Install the spark plug(s). Make sure the air gap
is set correctly.
37
2. Spark plug
3. Air gap (not to scale)