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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 34). Bend the side electrode (Figure 34) 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 34).
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 the
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 35).
3. Squeeze the ends of the hose clamp together
and slide it up the fuel line away from fuel filter
(Figure 35).
4. Pull the fuel line off the fuel filter (Figure 35). 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.
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