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Spark Plug Maintenance
Changing the spark plug will help your engine
to start easier and run better.
(e) Adjust the electrode gap to
(0.7 to 0.8 mm).
0.028” to 0.031”
(f) Seat spark plug in position and thread by
hand to prevent cross threading.
(g) Tighten plug with provided wrench and put
the cap back on spark plug.
SPARK PLUG:
(c)
(d) Inspect spark plug for damage and clean
with a wire brush before reinstalling
Remove spark plug using provided wrench.
Inspect
Muffler
and
Spark
Arrester
Inspect the muffler for cracks, corrosion, or
other damage. Remove the spark arrester, if
equipped, and inspect for damage or carbon
blockage. If replacement parts are required,
make sure to use only original equipment
replacement parts.
Exhaust heat/gases could ignite combustibles,
structures or damage fuel tank causing a fire,
resulting in death or serious injury . Contact
with muffler area could cause burns resulting
in serious injury.
WARNING
English Customer Service: 1-844-FIRMAN1
(a) Remove the spark plug cover.
(b) Remove the spark plug cable from the spark
plug.
NGK BPR6HS
Champion RL87YC
Torch E6RTC or equivalent
DO
NOT
touch
hot
parts
and
AVOID
hot
exhaust
gases
.
Allow
equipment
to
cool
before
touching
.
Keep at least 5 feet (1.5 m) of clearance on all
sides of generator including overhead.
Replacement parts must be the same and
installed in the same position as the original
parts.
•
•
•
•
Clean
or
replace
spark
arrester
as
follows
:
Depending on the type fuel used ,the type and
amount of lubricant used, and/or your operating
conditions, the exhaust part and muffler may
become blocked with carbon deposits. If you
notice power loss, you may need to remove these
deposits to restore performance.
1. Allow the engine to cool completely before
servicing the spark arrester.
2. Remove 5 screws to remove the muffler cover
assembly.
3. Loosen the spark arrester clamp, remove the
spark arrester cover, and with a thin blade
screwdriver remove the spark arrester.
4. Carefully remove the carbon deposits from the
spark arrester screen with a wire brush.
Maintenance Valve Clearance
- Intake:
(
)
- Exhaust: 0.003 - 0.005 in. (0.08 - 0.12 mm)
0.003 - 0.005 in. 0.08 - 0.12 mm
0.028-0.031in
(0.7-0.8mm)
