Maintenance
Spark Plug Service
!
Recommended spark plug: BPR5ES (NGK) / F7RTC (LG).
To ensure proper engine operation, the spark plug must be properly gapped and free of
deposits.
WARNING!
If the engine has been running, the exhaust will be very hot. Be careful not to touch the exhaust.
!
Remove the spark plug cap (3.2).
1
Visually inspect the spark plug. Discard it if the insulator is cracked or chipped.
2
Measure the plug gap with a feeler gauge. The gap should be 0.7-0.8mm. Correct as
necessary by bending the side electrode.
3
Attach the plug asher, thread the plug in by hand to prevent cross-threading.
4
When mounting a new spark plug, you should screw 1/2 more thread with the wrench after
the washer is compressed. If you are mounting an old one, you should only screw 1/8-1/4
more thread.
5
CAUTION!
The spark plug must be securely tightened. An improperly tightened plug can become very hot
and possibly damage the engine. Never use a spark plug with an improper heat range.
!
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