Specifications
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
Moderate = 50 hours
Engine
Single cylinder two-stroke engine
Displacement:
1.39 cu.in
(22.7 cm
Bore:
1.34 in
(34 mm)
Stroke:
0.98 in
(25 mm)
Engine power to
ISO 8993:
0.90 bhp
(0.7 kW)
Idle speed:
2,800 rpm
HS 81 R, HS 81 T
Ignition System
Typ: Electronic magneto ignition
Spark plug
(suppressed):
Electrode gap:
Fuel System
Carburetor: All position diaphragm
carburetor with integral fuel pump
Fuel tank capacity:
Fuel mix:
Cutting blade sharpening angle
45° to horizontal
Weight (complete unit)
HS 81 R/24"
HS 81 R/30"
HS 81 T/24"
HS 81 T/24"
3
)
HS 81 T/30"
1)
Air filter (felt)
2)
Air filter (paper)
Bosch USR 7 AC
0.02 in (0.5 mm)
15.6 oz (0.46 l)
See "Fuel"
1)
12.1 lbs (5.5 kg)
1)
12.6 lbs (5.7 kg)
1)
11.5 lbs (5.2 kg)
2)
11.7 lbs (5.3 kg)
1)
11.9 lbs (5.4 kg)
English / USA
Special Accessories
Contact your STIHL dealer for
information regarding special
accessories that may be available for
your product.
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