Fuel System Maintenance; Changing The Fuel Filter - Toro 22331 TX 420 Operator's Manual

Figure 40
1. Spark plug wire
4. Clean around the spark plugs.
5. Remove both spark plugs and metal washers.
Checking the Spark Plugs
1. Look at the center of both spark plugs (Figure 41).
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 plugs.
Always replace the spark plugs when they have
a black coating, worn electrodes, an oily film,
or cracks.
Figure 41
1. Center electrode insulator
2. Side electrode
2. Check the gap between the center and side electrodes
(Figure 41).
3. Bend the side electrode (Figure 41) if the gap is not
correct.
Installing the Spark Plugs
1. Thread the spark plugs into the spark plug holes.
2. Tighten the spark plugs to 20 ft-lb (27 N-m).
3. Push the wires onto the spark plugs (Figure 40).
4. Close the hood.
2. Spark plug
3. Air gap (not to scale)
Fuel System
Maintenance

Changing the Fuel Filter

Service Interval: Every 200 hours/Yearly (whichever
comes first)
1. Lower the loader arms, stop the engine, and remove
the key.
2. Open the hood and remove the left side screen.
3. Loosen the tank cap to relieve pressure.
4. Clamp the fuel lines on both sides of the fuel filter
(Figure 42).
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