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61MS 270, MS 270 C, MS 280, MS 280 C
English / USA
Engine
STIHL single cylinder two-stroke 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
Electronic magneto ignition
system
breakerless
Spark plug (suppressed)
Bosch WSR 6 F, NGK BPMR 7 A
Electrode gap
0.02 in (0.5 mm)
Fuel/Oil System
Diaphragm carburetor
All position with integral fuel pump
Fuel tank capacity
1.1 US pt (0.520 l)
Fuel mixture
See "Fuel"
Chain lubrication
Fully automatic, speed-controlled
reciprocating oil pump. Additional
manual oil flow control.
Oil tank capacity
0.6 US pt (0.280 l)
Specifications
MS 270 MS 270 C MS 280 MS 280 C
Displacement 3.0 cu in
(50 cm
3
)
3.0 cu in
(50 cm
3
)
3.3 cu in
(54.68 cm
3
)
3.3 cu in
(54.68 cm
3
)
Bore 1.73 in
(44.0 mm)
1.73 in
(44.0 mm)
1.81 in
(46.0 mm)
1.81 in
(46.0 mm)
Stroke 1.30 in
(32.9 mm)
1.30 in
(32.9 mm)
1.30 in
(32.9 mm)
1.30 in
(32.9 mm)
Idle speed 2,800 rpm 2,800 rpm 2,800 rpm 2,800 rpm
Weight without bar and chain 11.7 lb (5.3 kg) 11.9 lb (5.4 kg) 11.7 lb (5.3 kg) 11.9 lb (5.4 kg)