Specifications - Stihl MS 271 Instruction Manual

English
15 Oil Filler Cap
For closing the oil tank.
16 Muffler (with Spark Arresting Screen)
Muffler reduces engine exhaust noise and
diverts exhaust gases away from operator.
Spark arresting screen is designed to reduce
the risk of fire.
17 Front Hand Guard
Provides protection against projecting
branches and helps prevent left hand from
touching the chain if it slips off the handlebar.
It also serves as the lever for chain brake
activation.
18 Front Handle (Handlebar)
Handlebar for the left hand at the front of the
saw.
19 Spark Plug Boot
Connects the spark plug with the ignition
lead.
20 Starter Grip
The grip of the pull starter, for starting the
engine.
21 Fuel Filler Cap
For closing the fuel tank.
22 Master Control Lever
Lever for choke control, starting throttle, run
and stop switch position.
23 Throttle Trigger
Controls the speed of the engine.
24 Throttle Trigger Lockout
Must be depressed before the throttle trigger
can be activated.
25 Rear Handle
The support handle for the right hand, located
at the rear of the saw.
26 Rear Hand Guard
Gives added protection to operator's right
hand.
Guide Bar Nose
The exposed end of the guide bar. (not illus‐
trated, see chapter "Tensioning the Saw
Chain")
Clutch
Couples engine to chain sprocket when
engine is accelerated beyond idle speed. (not
illustrated)
Anti-Vibration System
The anti-vibration system includes a number
of anti-vibration elements designed to reduce
the transmission of vibrations created by the
42
engine and cutting attachment to the opera‐
tor's hands. (not illustrated)

34 Specifications

34.1 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
34.2 Engine
STIHL single cylinder two-stroke engine
34.2.1 MS 271, MS 271 C
Displacement:
Cylinder bore:
Piston stroke:
Engine power according to
ISO 7293:
Idle speed:
Maximum permissible
speed with cutting attach‐
ment:
34.2.2 MS 291, MS 291 C
Displacement:
Cylinder bore:
Piston stroke:
Engine power according to
ISO 7293:
Idle speed:
Maximum permissible
speed with cutting attach‐
ment:
34.3 Ignition system
Electronic magneto ignition
Spark plug (suppressed): Bosch WSR 6 F,
Electrode gap:
This ignition system fulfills all requirements of the
Canadian Interference-Causing Equipment
Standard CAN ICES-2/NMB-2.
34.4 Fuel system
All-position diaphragm carburetor with integral
fuel pump
Fuel tank capacity:
34 Specifications
50.2 cc
44.7 mm
32 mm
2.6 kW (3.5 HP) at
9500 rpm
2800 rpm
13,000 rpm
55.5 cc
47.0 mm
32 mm
2.8 kW (3.8 HP) at
9500 rpm
2800 rpm
13,000 rpm
NGK BPMR 7 A
0.5 mm
500 cc (0.5 l)
0458-574-8221-D