Replacing The Fuel Filter - Toro Pro Force 44553 Operator's Manual

Checking the Spark Plugs
Service Interval: Every 200 hours
1. Look at the center of the spark plugs
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 26
1. Center electrode insulator
2. Side electrode
Important:
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
if the gap is not correct.
Removing the Spark Plugs
1. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
2. Disconnect the spark-plug wires from the spark
plugs (Figure 27).
(Figure
3. Air gap—0.75 mm or 0.030
inch (not to scale)
26). Bend the side electrode
26).
1. Spark-plug wire
3. Clean around the spark plugs to prevent dirt
from falling into the engine and potentially
causing damage.
g001470
4. Remove the spark plugs and the metal washers.
Installing the Spark Plugs
1. Install the spark plugs and the metal washer.
Ensure that the air gap is set correctly; refer to
Checking the Spark Plugs (page
2. Tighten the spark plugs to 24 to 30 N∙m (18 to
22 ft-lb).
3. Connect the spark-plug wires to the spark plugs
(Figure 27).

Replacing the Fuel Filter

Service Interval: Every 500 hours
Never install a dirty filter if it is removed from the fuel
line.
1. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
2. Allow the machine to cool down.
3. Squeeze the ends of the hose clamps together
and slide them away from the filter
25
Figure 27
2. Spark plug
25).
(Figure
g002358
28).