MAINTENANCE
Refer to Recommended Maintenance Schedule in Fig. 15 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
To inspect or replace the spark plug:
1. Using a Phillips-head screwdriver (not included), remove the
service panel by unscrewing the three Phillips-head screws along
the upper edge.
2. Pull on the spark plug boot (Fig. 21) to remove it. Be careful not
to tear any insulation or wire.
3. Remove the spark plug rubber cover on the top of the genera-
tor next to the fuel gauge. Insert the included spark plug wrench
through the spark plug access hole to unscrew and then carefully
remove the spark plug from the engine (Fig. 22).
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.
4. 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 CR5HS/Torch A5RTC
spark
plug
(part no.
56200-0806
), available for purchase at
wenproducts.com
.
5. 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.
6. Measure the plug gap with a spark plug gap gauge. The gap
should be
0.6-0.7 mm (0.024-0.028 in).
(Fig. 23). Carefully ad-
just the gap if necessary.
7. Screw the spark plug back into the spark plug hole using the
spark plug wrench. Do not over-tighten spark plug. Recommended
tightening of spark plug is
½ to ¾ of a turn
(15 ft-lb torque/20.33
Nm) after spark plug gasket contacts spark plug hole.
8. Reinstall the spark plug boot, spark plug rubber cover, and ser-
vice panel.
Fig. 21
Plug Wrench
Spark Plug Boot
Spark Plug
Boot
Cylinder
Assembly
Fig. 22
Fig. 23
26
0.6 - 0.8 mm
