Honda F220K1 Owner's Manual page 37

Spark plug service
Recommended spark plug:
To ensure proper engine operation, the spark plug must be properly gapped
and free of deposits.
1. Remove the spark plug cap.
Use the spark plug wrench to remove the spark plug.
If the engine has been running, the muffler will be very hot. Be careful not
to touch the muffler.
2. Visually inspect the spark plug. Discard it if the insulator is cracked or
chipped. Clean the spark plug with a wire brush if it is to be reused.
3. Measure the plug gap with a feeler gauge.
Correct as necessary by bending the side electrode.
The gap should be: 0.6–0.7 mm (0.02–0.03 in)
SPARK PLUG WRENCH
4. Check that the spark plug washer is in good condition and thread the spark
plug in by hand to prevent cross-threading.
5. After seating it by hand, tighten a new spark plug 1/2 turn with the wrench to
compress the washer. If you are reusing a plug, it should only take 1/8–1/4
turn.
• TORQUE: 11.8 N·m (1.2 kgf·m, 8.7 lbf·ft)
CAUTION:
The spark plug must be securely tightened. An improperly tightened plug
can become very hot and possibly damage the engine.
Never use a spark plug with an improper heat range.
34
CR4HSB (NGK)
U14FSR-UB (DENSO)
0.6–0.7 mm
(0.02–0.03 in)
SIDE ELECTRODE
SPARK PLUG