Spark Plugs - Honda HRC7018 Owner's Manual

MAINTENANCE & ADJUSTMENTS
Spark Plugs
Recommended Types
NGK BPRSES
El
WI GEPR-U
NOTICE
Spark plugs of the wrong size or incorrect heat range can
cause engine damage.
Checking the Spark Plugs
For good performance, the spark plugs should have the
correct gap and be free of deposits.
1. Disconnect the spark plug caps and remove any dirt from
around the spark plug area.
2. Remove the spark plugs with
a spark plug wrench.
3. Inspect the spark plugs for
excessively worn electrodes,
chips or cracks in the
insulator, or excessive
deposits. Replace a spark
plug if you have any doubts
about its condition.
+
4. Measure the electrode gap
with a wire gap gauge. Adjust
the gap to 0.028 - 0.032 inch
I
(0.7 - 0.8 mm) by carefully
bending the side electrode.
0.028-0.032 in
(0.7 - 0.8 mm)
5. Install the plugs by hand to avoid cross threading.
6. Use a spark plug wrench to tighten the plugs enough to
compress the washer. For a used plug, tighten l/e to l/d of a
turn after the spark plug seats. For a new plug, tighten
l/z turn after the spark plug seats.
A loose spark plug can become hot enough to damage the
engine. Over tightening a spark plug can damage the
threads in the engine.
7. Install the spark plug caps on the plugs.
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