Spark Plug Service - Honda HS55 Owner's Manual

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SPARK PLUG SERVICE
Recommended spark plug: BPR5ES
(NGK).
WlGEPB-U (ND)
m!am
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. Visually inspect the spark plug, clean the spark plug with a wire brush if
it is to be reused. Discard it if there is apparent wear or if the insulator is
cracked or chipped.
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.Thread the plug in by hand to prevent cross-threading.
7. Tighten a new spark plug l/2 turn with the wrench to compress the
washer.
If you are reusing a plug, it should only take l/8- l/4 turn after the plug
seats.
CAUTION:
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.
PLUG GAP
27