Refer to Recommended Maintenance Schedule in Fig. 11 for maintaining the spark plug.
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.
SPARK PLUG MAINTENANCE
MAINTENANCE
To inspect or replace the spark plug:
1. Pull on the spark plug boot (Fig. 16) to remove it. Be careful not
to tear any insulation or wire.
2. Use the included spark plug wrench to unscrew and carefully
remove the spark plug from the engine (Fig. 17).
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 with a
NGK BP7ES/Torch E7TC
spark
plug (Part No. 56180-056), available for purchase at
wenproducts.com
.
4. If re-using the spark plug, use a wire brush to clean any dirt
from around the spark plug base, then re-gap the spark plug.
5. Measure the plug gap with a spark plug gap gauge. The gap
should be 0.7 to 0.8 mm (0.028-0.031 in.) (Fig. 18). Carefully
adjust the gap if necessary.
6. Screw the spark plug back into the spark plug hole by hand.
After the spark plug is properly seated, use the spark plug
wrench to tighten it. Do not over-tighten the spark plug.
NOTE:
The spark plug torque is 9 - 12 N.m ( 7 - 8 ft.lb). The
spark plug should be tightened 1/2 to 3/4 turn after spark plug
gasket contacts spark plug hole.
7. Reinstall the spark plug boot over the spark plug.
Recommended Spark Plug:
NGK BP7ES/Torch E7TC or Similar
Fig. 16
Plug Wrench
Spark Plug Boot
Spark Plug
Boot
Cylinder
Assembly
Fig. 17
Fig. 18
22
Summary of Contents for 56155
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