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Technical Data ■
Displacement
Bore
Stroke
Poweroutput
Ignitionsystem
Ignitionadvance
Air gap
Spark plugtype
Electrodegap
Handle heating
(181SG)
Carburetor
Fuel tank volume
Oil tank volume
Chain lubrication
Clutchdrum/sprocket
Weights
Weight sawbody incl. chain brake (empty)
Weight sawbody (empty) incl. chain brake and
18“ bar and chain
Classificationtable
80.7 cm3 (4.9 cu in)
52.0 mm (2.05”)
38.0 mm (1 .5”)
4.0 kW (5.5 hp) at 140 r/s (8.400 r/rein)
Make SEM type AM 7
25° before t.d.c. at 142 r/s (8.500 r/rein)
0.30 mm (0.01 2“)
Champion RCJ 7Y
0.5 mm (0.020”)
56 watts at 120 r/s (7.200 r/rein)
Diaphragm carburetor make Tillotson type HS 216
Basic setting:
H = 1.0
L = 1.0
0.85 Iitres (0.22 US gallon, 0.19 Imp gallon).
Fuel mixture 4% (1 :25)
With Husqvarna Twostroke Oil 2% (1 :50)
0.50 Iitres (0.13 US gallon, 0.11 Imp gallon)
Automatic. No supply during idling. Adjustable for 4 different delivery rates.
Recommended ~ositions:
Bar 18“;
Pos. 2
Bar 20” and more: Pos. 3–4
Standard 7 teeth. Optional 8 teeth. 3/8” pitch.
6.8 kg
15.0 lb
7.0 kg 15.4 lb
8.2 kg
18.1 lb
8.4 kg
18.5 lb
C c
P c
A
A
B
B
c
c
PLEASE NOTE!
As “A” denotes smallest cylinder diameter and “C’” the largest, piston grades
should be matched or one grade smaller. Eg it is not permissible to use a grade
B piston in a grade A cylinder.
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