Honda GOLDWING GL1500 Owner's Manual page 90

MAINTENANCE
4. Inspect the electrodes and center porcelain for deposits,
erosion or cabon fouling. If the erosion or deposit is heavy,
replace the plug. Clean a carbon or wet-fouled plug with a
plug cleaner, otherwise use a wire brush.
5.
Check the spark plug gap using a wiretype feeler gauge. If
adjustment is necessary, bend the side electrode carefully.
The gap should be:
0.8-0.9
mm
(0.031-0.035
in)
Make sure the plug washer is in good condition.
6. With the plug washer attached, thread the spark plug in by
hand to prevent crossthreading.
7. Tighten a new spark plug 1/2 turn with a spark plug
wrench to compress the washer. If you are reusing a plug,
it should only take
1/8 - 1/4
turn after the plug seats.
8. Reinstall the spark plug caps.
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.
Severe engine damage culd result.
84
~
0.8-0.9
mm
(0.031-0.035 in)
i
Side Electrode
, Washer