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Important: Always replace the spark plugs
when it has a black coating, worn electrodes, an
oily film, or cracks.
2. Check the gap between the center and side electrodes
(Figure 25). Bend the side electrode (Figure 25) if
the gap is not correct.
Removing the Spark Plugs
1. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
2. Disconnect the wires from the spark plugs
(Figure 26).
1. Spark-plug wire
3. Clean around the spark plugs to prevent dirt from
falling into the engine and potentially causing
damage.
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.
2. Tighten the spark plugs to 18 to 22 ft-lb (24.4 to
29.8 N-m).
3. Connect the wires to the spark plugs (Figure 25).
Replacing the Fuel Filter
Service Interval: Every 500 hours
Never install a dirty filter if it is removed from the fuel
line.
1. Stop 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.
Figure 26
2. Spark plug
3. Squeeze the ends of the hose clamps together and
slide them away from the filter (Figure 27).
1. Fuel filter
4. Remove the filter from the fuel lines.
5. Install a new filter and move the hose clamps close
to the filter (Figure 27).
Servicing 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 ensure that
the fuel tanks drain completely.
2. Stop the engine and remove the key.
3. Loosen the hose clamp at the fuel filter and slide it
up the fuel line away from the fuel filter (Figure 27).
4. Disconnect the fuel line from the fuel filter
(Figure 27).
Note: Allow gasoline to drain into a fuel container
can or drain pan (Figure 27).
Note: This is the best time to install a new fuel filter
because the fuel tank is empty.
5. Install the fuel line onto the fuel filter. Slide the hose
clamp close to the fuel filter to secure the fuel line
(Figure 27).
23
Figure 27
2. Hose clamp
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