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Checking the Spark Plug
Important:
Do not clean the spark plug(s).
Always replace the spark plug(s) when it has a
black coating, worn electrodes, an oily film, or
cracks.
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.
Set the gap to 0.75 mm (0.03 inch).
Figure 22
Installing the Spark Plug
1.
Thread the spark plug clockwise into the
spark-plug hole by hand.
2.
Rotate the spark plug clockwise using a
spark-plug wrench until the plug and sealing
washer are seated.
3.
Tighten the spark plug as follows:
•
When installing the original spark plug,
tighten the plug an additional 1/2 turn.
•
When installing a new spark plug, tighten the
plug an additional 1/8 to 1/4 turn.
Important:
A loose spark plug may cause
the cylinder to overheat. An over-tight spark
plug may damage the threads in the cylinder
head.
4.
Connect the spark-plug wire to the spark plug.
Fuel System
Maintenance
DANGER
In certain conditions, fuel is extremely
flammable and highly explosive. A fire or
explosion from fuel can burn you and others
and can damage property.
Refer to
Fuel Safety (page 13)
list of fuel related precautions.
Servicing the Fuel Filter
1.
Refer to
Preparing for Maintenance (page
2.
Drain fuel from the fuel tank.
3.
Remove the 2 nuts securing the muffler to the
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engine and remove the muffler.
4.
Remove the 3 bolts securing the fuel-tank
assembly to the engine.
5.
Gently lift the fuel tank off the engine. Loosen
the hose clamp and disconnect the hose from
the filter.
1. Hose clamp
20
for a complete
Figure 23
2. Hose
17).
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