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MAINTENANCE
SPARK ARRESTOR MAINTENANCE
Inspect and clean the spark arrestor every 100 hours of opera-
tion (refer to page 24, 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 screws holding the cover plate that secures
the end of the spark arrestor to the muffler.
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 arrestor if
it is damaged. Replacement spark arrestors can be purchased
from wenproducts.com by searching the part number 56500-
024.1.
4. Reinstall the spark arrestor in the muffler. Secure the cover
in place with the screws.
SPARK PLUG MAINTENANCE
Inspect and change the spark plug every 100 hours of opera-
tion (refer to page 24, 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 (Fig. 17) to remove it. Be
careful not to tear insulation or wire.
0.6 mm - 0.8 mm
Spark Plug BootSpark Plug Boot
Cylinder AssemblyCylinder Assembly
2. Use included spark plug wrench to unscrew spark plug from the engine. Remove the spark plug from the engine.
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 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. 18)
6. Screw spark plug back into spark plug hole using spark plug wrench. Do not over-tighten. Recommended tight-
ening of spark plug is ½ - ¾ of a turn after spark plug gasket contacts spark plug hole, or 15 - 20 Nm (11.1 - 14.7
ft-lbs).
7. Reinstall the spark plug boot over the spark plug.
Fig. 17
Fig. 18
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