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( c) Inspect spark plug for damage and clean with a wire brush before reinstalling. Replace if
damaged.
(d-1) For spark plug FIRMAN P/N 330723001 - Adjust the electrode gap to 0.020 - 0.024 in. ( 0.5 - 0.6 mm).
(d-2) For spark plug CHAMPION N9YC - Adjust the electrode gap to 0.028 - 0.031 in. ( 0.7 - 0.8 mm).
(e) Seat spark plug in position and thread by hand to prevent cross threading.
(f) Tighten plug with provided wrench and put the spark plug boot back on spark plug.
SPARK PLUG: FIRMAN P/N 330723001
SPARK PLUG: FIRMAN P/N 330723001 or CHAMPION N9YC
Maintenance Valve Clearance
Intake:
0.005 – 0.007 in. 0.13 – 0.17 mm
Exhaust: 0.007 – 0.009 in. (0.18 – 0.22 mm)
Muffler and Spark Arrester
WARNING! Contact with muffler area could cause burns resulting in serious injury.
• •
Do not tough hot parts.
It is a violation of California Public Resource Code, Section 4442, to use or operate the engine
on any forest-covered, brush-covered, or grass-covered land unless the exhaust system is
equipped with a spark arrester, as defined in Section 4442, maintained in effective working
order.
Other states or federal jurisdictions may have similar laws, reference Federal
Regulation 36 CFR Part 261.52.
English
0.020-0.024 in.
(0.5-0.6mm)
(
)
Maintenance - Storage
SPARK PLUG: CHAMPION N9YC
30
0.028-0.031 in.
(0.7-0.8mm)
Customer Service: 1-844-FIRMAN1
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