Stihl FS 120 - Technical Specifications

50
English / USA
FS 120, FS 120 R, FS 200, FS 200 R, FS 250, FS 250 R
Engine
EPA / CEPA:
The Emission Compliance Period
referred to on the Emissions
Compliance Label indicates the number
of operating hours for which the engine
has been shown to meet Federal
emission requirements.
Category:
A = 300 hours,
B = 125 hours,
C = 50 hours
CARB:
The Emission Compliance Period used
on the CARB Air Index Label indicates
the terms:
Extended = 300 hours,
Intermediate = 125 hours,
Moderate = 50 hours
Ignition System
Fuel System
Rewind Starter
Starter rope:
Ø 0.11 in (3,0mm), 33.5 in ( 850 mm)
long
Specifications
Model FS 120 FS 200 FS 250 Idle speed: 2,800 rpm
Single cylinder two-stroke
engine
Engine cutoff speed
(nominal): 12,300 rpm
Displacement: 1.88 cu.in
(30.8 cm
3
)
2.22 cu.in
(36.3 cm
3
)
2.45 cu.in
(40.2 cm
3
)
Max. output shaft
speed (cutting tool)
Bore: 1.38 in (35 mm) 1.50 in (38 mm) 1.57 in (40 mm) - with bike handle 8,790 rpm
Stroke: 1.26 in (32 mm) 1.26 in (32 mm) 1.26 in (32 mm) - with loop handle 9,960 rpm
Engine power to ISO 8893: 1.8 bhp (1.3 KW)
at 9000 rpm
2.2 bhp (1.6 KW)
at 9000 rpm
2.2 bhp (1.6 KW)
at 9000 rpm
Type: Electronic magneto ignition with
electronic speed governor
Spark plug (resistor
type): Bosch WSR 6 F,
NGK BPMR 7 A
or Champion
RCJ 6Y
Electrode gap: 0.02 in (0.5 mm)
Spark plug thread: M 14 x 1.25;
0.37 in long
(9.5 mm)
Carburetor: All position diaphragm
carburetor with integral fuel pump
Air filter: Paper filter
element
Fuel tank capacity: 21.6 fl.oz (0.64 L)
Fuel mix: See "Fuel"