Fuel System Maintenance; Draining The Fuel Tank - Toro 30070 Operator's Manual

Checking the Spark Plugs
1. Look at the center of the spark plugs (Figure 30). 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.
2. If needed, clean the spark plug with a wire brush to
remove carbon deposits.
Figure 30
1. Center electrode insulator
2. Side electrode
Important: Always replace the spark plugs when
it has worn electrodes, an oily film on it, or has
cracks in the porcelain.
3. Check the gap between the center and side electrodes
(Figure 30). Bend the side electrode (Figure 30) 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 30).
3. Air gap (not to scale)
Fuel System
Maintenance

Draining the Fuel Tank

DANGER
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 assure fuel tank
drains completely. Then disengage the power take off
(PTO), set the parking brake, and turn the ignition key
to off. Remove the key.
2. Close the fuel shut-off valve at the fuel tank (Figure 31).
3. Squeeze the ends of the hose clamp together and slide
it up the fuel line away from fuel filter (Figure 31).
4. Pull the fuel line off the fuel filter (Figure 31). Open
the fuel shut-off valve and allow the 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. Refer to Replacing the
Fuel Filter.
5. Install the fuel line onto the fuel filter. Slide the hose
clamp close to the valve to secure the fuel line.
1. Fuel shut-off valve
26
Figure 31
2. Clamp