Spark Plug Service - Honda HS522 Owner's Manual

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SPARK PLUG SERVICE
Recommended spark plug: BPRSES (NGK), WiGEPR-U (ND)
m If 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. Inspect the spark plug. Discard it if the electrodes are worn or if the in-
sulator 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.
0.7-0.8
mm (0.027-0.031 in)
Correct as necessary by bending the side electrode.
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 com-
press the washer.
NOTE: If 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.
CAUTION:
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Use only the recommended spark plugs or equivalent. Spark plugs
which have an improper heat range may cause engine damage.
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The spark plug must be securely tightened. An improperly tightened
spark plug can'become very hot and may damage the engine.
PLUG GAP
27