MAINTENANCE
SPARK ARRESTOR MAINTENANCE
Inspect and clean the spark arrestor every 100 hours of opera-
tion (refer to page 28, Table 4). The spark arrestor is located
outside the muffler, which gets very hot during operation. Al-
low the engine to cool completely before servicing the spark
arrestor.
1. Remove the two Phillips-head screws that secure the spark
arrestor to the muffler (Fig. 23).
2. Remove the spark arrestor screen.
3. Carefully clean and remove carbon deposits from the spark
arrestor screen with a wire brush. Replace the spark arres-
tor if it is damaged. Replacement spark arrestors can be pur-
chased from wenproducts.com by searching the
part number
GN9500-035.1.
4. Reinstall the spark arrestor in the muffler and secure it in
place with the screws.
SPARK PLUG MAINTENANCE
Inspect and change the spark plug every 100 hours of opera-
tion (refer to page 28, Table 4).
The spark plug is important
for proper engine operation. Check the spark plug regularly to
maintain proper engine operation. A good spark plug should
be intact, free of deposits, and properly gapped.
1. Gently pull on the spark plug boot to remove it. Be careful
not to tear insulation or wire.
2. Use included spark plug wrench to unscrew spark plug from
the engine. Remove the spark plug from the engine. (Fig. 24)
TIP:
There is limited space for the wrench to turn. Use both
rows of holes in the spark plug wrench to gain leverage to
loosen the plug.
3. Visually inspect the spark plug. If it is cracked or chipped,
or if the electrodes are worn or burned, discard it and replace
with a new spark plug. We recommend replacing it with an
NGK BP6ES/Torch F6TC
spark plug. These can be purchased
0.6 mm - 0.8 mm
Spark Plug Boot
Spark Plug Boot
Spark Plug Boot
Cylinder Assembly
Cylinder Assembly
Cylinder Assembly
Spark Plug
Wrench
Spark Plug
Handle
from
wenproducts.com
by searching
part number
56500-123.
4. If re-using spark plug, use a wire brush to clean any dirt from around spark plug base, then re-gap spark plug.
5. Measure plug gap with a spark plug gap gauge. Gap should be 0.6 to 0.8 mm. Adjust gap if necessary. (Fig. 25)
6. Screw spark plug back into spark plug hole using spark plug wrench. Do not over-tighten. Recommended tighten-
ing of spark plug is
½ - ¾ of a turn
15 - 20 Nm (11.06 - 14.75 ft-lb) after spark plug gasket contacts spark plug hole.
7. Reinstall the spark plug boot over the spark plug.
Fig. 23
Fig. 24
Fig. 25
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