Spark Plug Maintenance - Wen 56225i Instruction Manual

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 service panel by unscrewing the three Phillips-head
screws along the upper edge.
2. Pull on the spark plug boot (Fig. 19) to remove it. Be careful
not to tear any insulation or wire.
3. Remove the spark plug rubber cover on the top of the gen-
erator 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.
20).
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 0.6-0.8 mm (0.024-0.031 in). (Fig. 21). 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. Rec-
ommended 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
service panel.
28
MAINTENANCE
Spark Plug Boot Spark Plug Boot
Cylinder Assembly Cylinder Assembly
Spark Plug Spark Plug
Handle Wrench
0.6 mm - 0.8 mm
Fig. 19
Fig. 1
Fig. 20
Fig. 21