Fig. 1
MAINTENANCE
SPARK PLUG MAINTENANCE
Refer to Recommended Maintenance Schedule in Table 4 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.
To inspect or replace the spark plug:
1. Using a Phillips-head screwdriver (not included), remove the ser-
vice 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 generator
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
0.7mm - 0.8mm (0.028 in. - 0.031 in.)
(Fig. 23). Carefully adjust
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 tighten-
ing 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 service
panel.
Spark Plug Boot
Spark Plug Boot
Spark Plug Boot
Cylinder Assembly
Cylinder Assembly
Cylinder Assembly
Fig. 21
Spark Plug
Wrench
Spark Plug
Handle
Fig. 22
0.7 mm - 0.8 mm
Fig. 23
34