Chain Brake; Fuel And Oil - Husqvarna 181 Workshop Manual

2
Service Data
Chain brake
.
When used with a 18" guide bar the Swed-o-Matic should release at a load on
the bar tip of 12–17 kp (26–37 lb).
Replace the brake band as soon as wear has reduced its original thickness by
more than
25~0, i.e.
at least 0,75 mm (0.03") must be left of the original
band thickness.
Fuel and oil
The twostroke engine is lubricated by oil mixed with petrol in various pro-
portions depending on the type of oil used:
Ordinary twostroke oil 1 :25 (4% oil)
Husqvarna Twostroke oil 1 :50 (2% oil)
See also the mixing table below:
M t
Mixing table 2% 4%
Litres Pints Litres Petrol in
Petrol in
Litres
Petrol in Petrol in
of oil of oil of petrol Imp gallon US gallon of petrol Imp gallon US gallon
0.2 0.35 10 2,2
2.6 5 1.1 1,3
0.4 0.70 20 4.4
5.2 10 2.2 2.6
1.0 1.76 50
11.0 13.2 25
5.5
6.6