Fuel System Maintenance; Replacing The Fuel Filter - Toro 71255 Operator's Manual

usually the most effective method for cleaning. The
spark plugs are most accessible when the blower
housing is removed for cleaning.
7. Remove the spark plugs.
Checking the Spark Plugs
1. Inspect the spark plugs (Figure 22).
Note: 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.
Figure 22
1. Center electrode insulator
2. Side electrode
Important: Do not clean the spark plugs.
Always replace a spark plug when it has a black
coating, worn electrodes, an oily film, or cracks.
2. Check the gap between the center and side electrodes
(Figure 22). Bend the side electrode if the gap is not
correct.
Installing the Spark Plugs
1. Install the spark plugs.
Note: Ensure that the air gap of each spark plug
is set correctly.
2. Tighten the spark plugs to 16 ft-lb (22 N-m).
3. Connect the wire to each spark plug.
4. Install the shield over the spark plugs.
5. Close the hood.
3. Air gap (not to scale)
Fuel System
Maintenance

Replacing the Fuel Filter

Service Interval: Every 100 hours—Replace the fuel
filter.
Important: Do not install a dirty filter if it is
removed from the fuel line.
1. Park the machine on a level surface and disengage
the blade control (PTO).
2. Stop the engine, wait for all moving parts to stop, and
remove the key before leaving the operating position.
3. Raise the hood and locate the fuel filter between the
fuel tank and the engine (Figure 23).
1. Fuel line from fuel tank
2. Hose clamp
3. Fuel filter
4. Squeeze the ends of the hose clamps together and
slide them away from the filter (Figure 23).
5. Remove the filter from the fuel lines.
22
Figure 23
4. Fuel line to engine
5. Flow direction arrow