Honda HRA216 Owner's Manual page 32

Spark Plug
Standard Plug: BPSES, BPR5ES (NGK)
WI GEP-U, WI GEPR-U (ND)
CAUTION: Use only the recommended spark plugs or their equivalent.
Spark plugs which have an improper heat range may cause engine damage.
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1. Disconnect the cap and remove the spark plug.
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If the engine has been running, the muffler will be very hot. Be
careful not to touch the muffler.
2. Visually inspect the plug. Discard the plug if it is heavily deposited or if
the insulator is cracked or chipped.
3. Measure the plug gap with a wire-type feeler gauge; it should be
0.7-0.8 mm (0.028-0.031 in). If adjustment is necessary, bend the
side electrode carefully.
4. Make sure the sealing washer is in good condition, then thread the spark
plug in by hand until it seats.
5. Use the wrench to tighten a new plug l/2 turn further to compress the
washer. If you are reusing the plug, it should only take l/8- l/4 turn
after the plug seats.
CAUTION: The spark plug must be securely tightened. An improperly
tightened spark plug can become very hot and may damage the engine.
6. Replace the spark plug cap.
SPARK PLUG WRENCH
0.7-0.8 mm
(0.028-0.031 in.)
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