Fuel System Maintenance; Draining The Fuel Tank; Replacing The Fuel Filter - Toro 74806 Operator's Manual

Figure 28
1. Spark plug wire installed
Checking the Spark Plug
1. Look at the center of the spark plug(s)
(Figure 29). 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.
2. Check the gap between the center and side
electrodes (Figure 29). Bend the side electrode
(Figure 29) if the gap is not correct.
Figure 29
1. Center electrode insulator
2. Side electrode
Installing the Spark Plug(s)
1. Install the spark plug(s). Make sure that the
air gap is set correctly.
2. Tighten the spark plug(s) to 11 ft-lb (15 N⋅m).
3. Push the wire(s) onto the spark plug(s)
(Figure 28).
2. Spark plug
3. Air gap (not to scale)
Fuel System
Maintenance

Draining 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 tank drains completely.
2. Disengage the blade control switch (PTO). and
move the control levers to the neutral locked
position and apply the parking brake.
3. Stop the engine, remove the key, and wait for
all moving parts to stop before leaving the
operating position.
4. Close the fuel shut-off valve located under the
front of the fuel tank.
5. Loosen the hose clamp at the fuel filter and
slide it up the fuel line away from the fuel filter
(Figure 30).
6. Pull the fuel line off of the fuel filter (Figure 30).
7. Open the fuel shut-off valve. Allow gasoline to
drain into a gas can or drain pan.
Note: Now is the best time to install a new
fuel filter because the fuel tank is empty.

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 blade control (PTO). and move
the control levers to the neutral locked position
and apply the parking brake.
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