33
SP 81
English
Engine
Ignition System
Fuel System
Rewind Starter
Weight
Total weight, dry machine:
5.4 kg
Gearhead with rakes:
1.3 kg
Length
Overall length: 2050 mm
Gearhead with rakes: 390 mm
Noise and Vibration Data
1)
Noise and vibration measurements
include idling and rated maximum
speed in a ratio of 1:6.
2)
For further details concerning
compliance with the employers'
directive on vibrations 2002/44/EC
see www.stihl.com/vib/.
Single cylinder two-stroke engine
Displacement:
25.4 cm
3
Bore:
34 mm
Stroke:
28 mm
Engine power
to ISO 8893:
0.95 kW
(1.3 bhp)
Idle speed:
2,800 rpm
Cut-off speed
(rated):
10,500 rpm
Stroke rate at
10,000 rpm
8,000 str/min
Type: Electronic magneto ignition
Spark plug
(suppressed):
Bosch WSR 6 F,
NGK BPMR 7 A
or Champion
RCJ 6Y
Electrode gap:
0.5 mm
Spark plug thread:
M 14 x 1.25;
9.5 mm long
Specifications
Carburetor: All position diaphragm
carburetor with integral fuel pump
Air filter:
Foam and felt
elements
Fuel tank capacity:
0.44 l (440 cm
3
)
Fuel mix:
see chapter on
“Fuel”
Starter rope:
Diameter: 2.7 mm
Length: 910 mm
Tool:
Rake
Sound pressure level
L
peq
to
EN ISO 11680-1
1)
94 dB(A)
Sound power level
L
weq
to
EN ISO 11680-1
1)
108
dB(A)
Vibration measurement
to EN ISO 11680-1
1)2)
Handle, left
6.2 m/s
2
Handle, right
10.2 m/s
2
