Honda Spacy-i Owner's Manual page 60

9. With the plug washer attached, thread
the spark plug in by hand to prevent
cross-threading.
10. Tighten the spark plug:
If the old plug is good:
●
1/8 turn after it seats
If installing a new plug, tighten it twice
●
to prevent loosening:
a) First, tighten the plug:
NGK: 1/2 turn after it seats.
DENSO: 3/4 turn after it seats.
b) Then loosen the plug.
c) Next, tighten the plug again:
1/8 turn after it seats.
NOTICE
Improperly tightened spark plugs can damage the
engine. If a plug is too loose, a piston may be damaged.
If a plug is too tight, the threads may be damaged.
11. Reinstall the spark plug cap. Take care
avoid pinching any cables or wires.
Honda Spacy-i Owner's Manual
12. Install the parts in the reverse order of
removal.
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Spark Plug Checking Spark Plug
a
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