Honda HR215KHMA Owner's Manual page 52

MAINTENANCE
2. Remove the spark plug with a
?!a in (21 mm) spark plug
wrench.
SPARK PLUG WRENCH
3. Inspect the spark plug. Replace
it if the electrodes are worn, or if
the insulator is cracked or
chipped. Clean the spark plug
with a wire brush if you are
going to reuse it.
4. Measure the spark plug
electrode gap with a suitable
gauge. The gap should be
0.028
-
0.031
in (0.7 - 0.8 mm).
Correct the gap, if necessary,
by carefully bending the side
electrode.
0.028 - 0.031 in
(0.7 - 0.8 mm)
5. Install the spark plug carefully, by
hand, to avoid cross-threading.
6. After the spark plug seats,
tighten with a 13/1a in (21 mm)
spark plug wrench to compress
the washer.
If reinstalling the old spark plug,
tighten l/s to l/b turn after the
spark plug seats.
If installing a new spark plug,
tighten l/z turn after the spark
plug seats to compress the
washer.
A loose spark plug can overheat and damage the engine.
Over-tightening the spark plug can damage the threads in the
cylinder head.
7. Install the spark plug cap on the spark plug.
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