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Removing the Spark Plugs
1.
Disengage the PTO, move the motion-control
levers to the N
EUTRAL
parking brake.
2.
Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3.
Remove the spark plugs as shown in
Figure 41
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 42
-
position, and set the
LOCK
Figure
Installing the Spark Plug
41.
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Checking the Spark
Arrester
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If Equipped
Service Interval: Every 50 hours
WARNING
Hot exhaust-system components may ignite
gasoline vapors even after you shut off the
engine. Hot particles exhausted during engine
operation may ignite flammable materials,
resulting in personal injury or property
damage.
Do not refuel or run the engine unless the
spark arrester is installed.
1.
Shut off the engine, wait for all moving parts to
stop, engage the parking brake, and remove
the key.
2.
Wait for the muffler to cool.
3.
If you see any breaks in the screen or welds,
replace the arrester.
4.
If the screen is plugged, remove the arrester,
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shake loose particles out of the arrester, and
clean the screen with a wire brush (soak the
screen in solvent if necessary).
5.
Install the arrester on the exhaust outlet.
36
Figure 43
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