Fuel System Maintenance; Replacing The Fuel Filter; Servicing The Fuel Tank - Toro 74412 Operator's Manual

Important: Always replace the spark
plugs when it has a black coating, worn
electrodes, an oily film, or cracks.
3. Check the gap between the center and side
electrodes (Figure 36). Bend the side electrode
(Figure 36) if the gap is not correct.
Installing the Spark Plugs
1. Install the spark plugs and the metal washer.
Ensure that the air gap is set correctly.
2. Tighten the spark plugs to 16 ft-lb (22 N⋅m).
3. Connect the wires to the spark plugs
(Figure 36).
Fuel System
Maintenance

Replacing the Fuel Filter

Replace the fuel filter after every 200 operating
hours or yearly, whichever occurs first.
Never install a dirty filter if it is removed from the
fuel line.
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. Allow the machine to cool down.
4. Stop the engine, remove the key, and wait for
all moving parts to stop before leaving the
operating position.
5. Close the fuel shutoff valve (Figure 37).
Figure 37
1. Fuel shutoff valve
2. Hose clamp
6. Squeeze the ends of the hose clamps together
and slide them away from the filter (Figure 37).
7. Remove the filter from the fuel lines.
8. Install a new filter and move the hose clamps
close to the filter (Figure 37).
9. Open the fuel shutoff valve.

Servicing the Fuel Tank

In certain conditions, gasoline is extremely
flammable and highly explosive. A fire or
explosion from gasoline can burn you and
others and can damage property.
• Drain gasoline from the fuel tank when
the engine is cold. Do this outdoors in
an open area. Wipe up any gasoline that
spills.
• Never smoke when draining gasoline,
and stay away from an open flame or
where a spark may ignite the gasoline
fumes.
1. Park the machine on a level surface to ensure
that the fuel tanks drain completely.
2. Disengage the power takeoff (PTO), set the
parking brake, stop the engine, and remove
the key.
3. Close the fuel shutoff valve (Figure 37).
4. Loosen the hose clamp at the fuel filter and
slide it up the fuel line away from the fuel filter
(Figure 37).
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3. Fuel line
4. Fuel lter