Firman W01785, Operator'S Manual, Page: 27 / 41

(d) Inspect spark plug for damage and clean with a wire brush before reinstalling. Replace if
damaged.
(e) Adjust the electrode gap to 0.028 - 0.031 in. (0.7 - 0.8 mm).
(f) Seat spark plug in position and thread by hand to prevent cross threading.
(g) Tighten plug with provided wrench and put the spark plug boot back on spark plug.
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
Muffler and Spark Arrester
•
•
WARNING! Contact with muffler area could cause burns resulting in serious injury.
Do not touch 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.
25
Maintenance - Storage
0.028 - 0.031 in.
(0.7 - 0.8 mm)
SIDE ELECTRODE
SEALING
WASHER
SPARK PLUG:
NGK BPR6HS, Champion RL87YC, Torch E6RTC or equivalent.
English Customer Service: 1-844-FIRMAN1