Servicing The Spark Plug - Toro 74253 Operator's Manual

Figure 37
1. Engine oil filter
3. Apply a thin coat of new oil to the rubber gasket on
the replacement filter (Figure 38).
4. 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 38).
Figure 38
1. Oil filter
2. Gasket
5. Fill the crankcase with the proper type of new oil;
refer to Changing the Oil.

Servicing the Spark Plug

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: NGK BPR4ES or equivalent
• Air Gap: 0.030 inch (0.75 mm)
3. Adapter
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 39).
Now clean around the spark plug(s) to prevent dirt
from falling into the engine and potentially causing
damage.
4. Remove the spark plug(s) and metal washer.
1. Spark plug wire
Checking the Spark Plug
Service Interval: Every 100 hours
1. Look at the center of the spark plug(s) (Figure 40).
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.
34
Figure 39
2. Spark plug