Honda H4013 Owner's Manual page 51

6. Install the spark plug carefully, by hand, to avoid cross-threading.
7. After the spark plug is seated, tighten with a spark plug wrench to com-
press the washer.
[jlVIPORTANT NOTKE 1 A loose spark plug can get hot enough to damage the
engine. Overtightening may damage the threads.
NOTE:
If installing a new spark plug, tighten 112 turn after the spark plug
seats to compress the washer. If reinstalling a used spark plug, tighten
l/8- l/4 turn after the spark plug seats to compress the washer.
SPARK PLUG WRENCH
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