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MAINTENANCE
Spark Plug
Spark Plug Inspection and Replacement
2. Remove the spark plug cap (B).
3. Clean any dirt from around the
base of the spark plug.
4. Using a spark plug wrench,
remove the spark plug.
5. Inspect the electrode for wear and
carbon buildup. Look for a sharp
outer edge with no rounding or
erosion of the electrode.
6. Inspect spark plug. Replace if electrode is worn or if the insulator is
cracked, chipped, or fouled.
7. Using a wire-type feeler gauge,
measure the spark plug
electrode gap. If necessary,
correct the gap by carefully
bending the side electrode. The
gap should be 0.6 - 0.7 mm
(0.024 - 0.028 in).
8. Ensure the spark plug sealing washer is in good condition and
thread the spark plug in by hand to prevent cross-threading.
A loose spark plug can overheat and damage the engine. Over tightening
the spark plug can damage the plug threads.
9. After a new spark plug has been seated by hand, it should be
tightened 1/2 turn with a wrench to compress its washer. If a used
plug is being reinstalled, it should only require 1/8 to 1/4 turn after
being seated.
10. Re-install the spark plug cap (B).
11. Re-install the top of the generator by inserting and tightening the 4
bolts (A) through the handles.
B
Inspect electrode
for wear and
buildup
Spark plug gap