Engine Maintenance
Spark plug
It is recommended to use spark plug,
RC12YC
or equivalent one.
Spark plug of incorrect type may damage the engine.
1) Remove the spark plug cap
，
Clean dust around the spark plug.
2) Unscrew the spark plug with a special socket wrench.
3) Check spark plug. If the electrode has damaged, or isolator has broken, replace the
spark plug. The clearance of the spark plug electrode should be 0.70-0.80mm. Adjust
the side electrode, if necessary.
4) Screw the spark plug with hand carefully to avoid damaging the thread on the head.
5) When the spark plug is in position, tighten the spark plug with the special socket
wrench and depress the washer.
If install the used spark plug
，
after depressing the washer, retighten it 1/8-1/4 turn.
6) Reinstall the spark plug cap.
Caution
Spark plug
