17
5. Operate the throttle system several times and check if it has free play
(i.e. throttle trigger does not move while operating the throttle
trigger interlock).
After adjustment, check the throttle trigger for smooth operation.
Consult your authorized Honda dealer if necessary.
6. Reinstall the air cleaner cover by inserting the lower tabs, then insert
the upper tab.
SPARK PLUG
Recommended Spark Plug: CMR5H (NGK)
The recommended spark plug has the correct heat range for normal
engine operating temperatures.
An incorrect spark plug can cause engine damage.
For good performance, the spark plug must be properly gapped and free
of deposits.
1. Loosen the socket bolt with a hexagon wrench, then remove the top
cover.
Do not operate the engine when the top cover is removed.
Do not pull the recoil starter handle when the top cover is
removed.
You may be injured from the rotating parts or burned by the
muffler or other engine components.
THROTTLE TRIGGER INTERLOCK
THROTTLE TRIGGER
2. Disconnect the spark plug cap, and remove any dirt from around the
spark plug area.
3. Remove the spark plug with a 5/8-inch spark plug wrench.
4. Inspect the spark plug.
Replace it if damaged or badly fouled, if the sealing washer is in poor
condition, or if the electrode is worn.
5. Measure the spark plug electrode gap with a wire-type feeler gauge.
Correct the gap, if necessary, by carefully bending the side electrode.
The gap should be:
0.024–0.028 in (0.6–0.7 mm)
6. Install the spark plug carefully, by hand, to avoid cross-threading.
7. After the spark plug is seated, tighten with a 5/8-inch spark plug
wrench to compress the sealing washer.
When installing a new spark plug, tighten 1/2 turn after the spark
plug seats to compress the washer.
When reinstalling the original spark plug, tighten 1/8–1/4 turn after
the spark plug seats to compress the washer.
A loose spark plug can overheat and damage the engine. Overtightening
the spark plug can damage the threads in the cylinder head.
TORQUE: 11.8 Nm (1.2 kgf∙m, 8.7 lbf∙ft)
8. Attach the spark plug cap to the spark plug.
9. Install the top cover, and tighten the socket bolt securely with a
hexagon wrench.
SPARK PLUG WRENCH
SPARK PLUG
SIDE ELECTRODE
0.024–0.028 in
(0.6–0.7 mm)
SEALING WASHER
31VP86080.fm 17 ページ ２０２３年１０月５日 木曜日 午後２時２２分
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