Specifications - Stihl BR 450 Instruction Manual

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16 Carburetor Adjusting Screws
. For tuning the carburetor.
17 Manual Fuel Pump
. Provides additional fuel feed for a cold start.
18 Choke Knob
. Eases engine starting by enriching mixture.
19 Starter Grip
. The grip of the pull starter, for starting the
engine.
20 Fuel Filler Cap
. For closing the fuel tank.
21 Fuel Tank
. For fuel and oil mixture.
22 Spark Plug Boot
. Connects the spark plug with the ignition
lead.
23 Muffler (with Spark Arresting Screen)
. Muffler reduces exhaust noises and diverts
exhaust gases away from operator.
Spark arresting screen is designed to reduce
the risk of fire.
24 Spacer
. Designed to reduce the risk of burns and fire.

20 Specifications

20.1 Engine
Single-cylinder two-stroke engine
Displacement:
Cylinder bore:
Piston stroke:
Idle speed:
Engine power to ISO 7293: 2.9 kW (3.9 bhp)
20.2 Ignition system
Electronic magneto ignition
Spark plug (suppressed): NGK BPMR 7 A,
Electrode gap:
20.3 Fuel system
All-position diaphragm carburetor with integral
fuel pump
Fuel tank capacity:
20.4 Blowing capacity
Blowing force:
Air velocity
Air throughput:
Maximum air speed:
Maximum air flow rate without
blower tube:
20
3
63.3cm
48 mm
35 mm
3000 rpm
BOSCH WSR 6 F
0.5 mm
3
1700 cm (1.7 l)
28 N
83 m/s
3
1090 m /h
99 m/s
3
1430 m /h
20.5 Weight
BR 450:
BR 450 C:
20.6 Sound and Vibration Levels
When determining sound and vibration levels,
idling and the nominal maximum engine speed
are taken into account in a ratio of 1:6.
For further details on compliance with Vibration
Directive 2002/44/EC, see
www.stihl.com/vib
20.7 Sound pressure level L
accordance with DIN EN ISO
22868
BR 450:
BR 450 C:
20.8 Sound power level L
accordance with DIN EN ISO
22868
BR 450:
BR 450 C:
20.9 Vibration measurement a
accordance with DIN EN
ISO 22867
20.9.1 Standard version
BR 450:
BR 450 C:
20.9.2 Version with bike handle
Handle, left
BR 450:
2.5 m/s
BR 450 C:
2.5 m/s
The K‑factor in accordance with Directive
2006/42/EC is 2.0 dB(A) for the sound pressure
level and sound power level; the K‑factor in
accordance with Directive 2006/42/EC is
2
2.0 m/s for the vibration level.
20.10 REACH
REACH is an EC regulation and stands for the
Registration, Evaluation, Authorization and
Restriction of Chemical substances.
20 Specifications
10.6 kg
11.5 kg
in
peq
102 dB(A
)
102 dB(A
)
in
weq
108 dB(A
)
108 dB(A
)
hv,eq
Handle,
right
2
2.5 m/s
2
2.5 m/s
Handle,
right
2 2
2.5 m/s
2 2
2.5 m/s
0458-391-8321-B
in