Spark Plug Service
Recommended spark plug: DR-5HS (NGK), XlGFSR-U (ND)
1. Remove the engine cover.
2. Remove the spark plug caps.
3. Use the wrench supplied in the tool kit to remove the spark plugs.
4. Visually inspect the spark plug. Discard it if the insulator is cracked or
chipped. Clean each spark plug with a wire brush if it is to be reused.
5. Measure the plug gaps with a feeler gauge.
Each gap should be 0.6-0.7 mm (0.024-0.028 in). Correct as _
necessary by bending the side electrode.
6. Check that the spark plug washers are in good condition, and thread the
spark plugs in. by hand to prevent cross-threading.
7. After the spark plugs are seated, tighten with a spark plug wrench to
compress the washers.
NOTE: If installing a new spark plug, tjghten l/2 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.
8. Reinstall the engine cover.
CAUTION: The spark plug must be securely tightened. An improperly
tightened plug can become very hot and may cause engine damage.
Use only the recommended spark plugs or equivalent. Spark plugs which
have an improper heat range may cause engine damage.
.PLUG GAP
0.6-0.7 mm
(0.024-0.028
in) 30