Segway VILLIAN SSV Series Service Manual page 46

【D】Spark plug sleeve
The spark plug is located under the rear cargo bed and
the air fi lter. First remove the rear storage box, and then
remove the air filter。The twin-cylinder engine has two
spark plugs. When replacing the spark plugs, please
replace both spark plugs at the same time.
1. Remove the ignition coil fi xing bolts;
2. Take out the ignition coil;
3. The spark plug is located below the ignition coil. Use
tool to turn the spark plug cap 1/4 and remove it from
the spark plug.
4. Rotate the spark plug counterclockwise and remove
it.
5. Inspect the spark plug
Spark plug normal status: The electrode part is grayish
white, grayish yellow or light brown, and the electrode
gap is about 0.7-0.9mm.
Spark plug to be replaced: The spark plug appears
electrode ablation, carbon deposition, clearance is too
large, at this time the spark plug should be replaced.
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