Spark Plug Service - Honda HS624 Owner's Manual

Spark plug service
Recommended spark plug: BPR5ES (NGK) , W 1 GEPR-U (NIPPONDENSO)
lf the engine has been running, the muffler will be very hot. Be careful not
to touch the muffler while it is hot.
To ensure proper engine operation, the spark plug must be properly
gapped and free of deposits.
1. Remove the spark plug cap.
2. Clean any dirt from around the spark plug base.
3. Use the wrench supplied in the tool kit to remove the spark plug.
4.lnspect the spark plug. Discard it if the electrodes are worn or if the
insulator is cracked or chipped. If it is to be reused clean the electrode
and insulator with a wire brush.
5. Measure
the plug gap with a feeler gauge.
Correct as necessary by bending the side electrode.
The gap shoukl be:
0.70-0.80 mm (0.028-0.031 in)
6. Make sure that the spark plug washer is in good condition and thread the
spark plug in by hand to prevent cross-threading.
7.After the spark plug is seated, tighten with a spark plug wrench to
compress the washer.
NOTE:
lf installing a new spark plug, tighten l/2 turn after the spark plug seats to
compress the washer. If reinstalling a used spark plug, tighten l/8 to l/4
turn after the spark plug seats.
l
Use only the recommended spark plugs or equivalent. Spark plugs
which have an improper heat range may cause engine damage.
l
The spark plug must be securely tightened. An improperly tightened
spark plug can become very hot and may damage the engine.
SPARK PLUG
WRENCH
PLUG GAP
0.70-0.80
mm
(0.027-0.031
in)
38