Husqvarna 266 User Manual
©Husqvarna
Chain saw
model 266
TECHNICAL SPECIFICATION
Displacement . .
Bore
..................
Stroke
Ignition advance. .. . 25° before t.d.c. at 8500 rpm
Sparking Plug . . . . Champion CJ 7Y, PAL P8Y
Electrode gap . . . . 0.5 mm
Carburettor . . . . . . Diaphragm type
...............
. . 66.7 cm3
. . 50 mm
. . 34 mm
Tillotson HS 163 A
Fuel tank capacity
Oil tank capacity . . . . 0.45 l
Sawing chain. . . . . .3/8” pitch
Guide Bar
Weight empty, incl. 15”
guide bar , chain . . . . 7.0 kg (SE)
and chain brake .
...........
___
0.75 l
. . . 15”
. . . 7.4 kg (SG)
Operator’s manual
101 84 00-26 B
What is what on the chain saw?
1. Starter handle
2. Oil filler cap
3. Starter
4. Adjusting screws.
carburettor 11.
5. Fuel filler cap 12.
6. Ignition switch
7.
Throttle trigger
8.
Front hand guard
Chain brake activator
9.
10.
Choke
13.
Assembiing guide bar and chain
A. Undo the guide bar nuts and remove the clutch cover and
transport packing piece.
B. Place the guide bar into its rearmost position. Make sure that
the chain tensioning stud is properly in the hole in the guide
bar
E. Tension the chain while holding up the bar tip. Do not tension
the chain stronger than it can be pulled around by hand.
Tighten the guide bar nuts.
NOTE!
Do not forget to “run in” the chain and guide bar. Please see the
chain manufacturer’s recommendation.
CHECK THE CHAIN TENSION FREQUENTLY FOR OPTIMAL
PERFORMANCE AND DURABIITY.
Fuei and oii
The power plant of this chain saw is a
twostroke engine, that is run on a petroland oil mixture of certain proportions
acc. to the table.
Do not use but a twostroke oil of high
quality, e.g. Husqvarna Twostroke Oil, that
is specially developed for chain saws.
NOTE!
No extra oil is needed in the petrol during
the running-in period of the chain saw.
' For lubricating the chain and guide bar
. we recommend a chain lubricating oil
Always use quality chain oil. If not available use gear box oil type
EP 90.
with good adhesive properties.
During the wintertime at air temperatures
below 0°C (32°F) some types pf chain
lubricating oils are viscous. This can
cause overloading of the oil pump,
which can result in damage of the pump
drive and pump parts. Under cold
weather conditions it is therefore ne
cessary to use a “wintergrade” oil which
stays fluent even when cold'.
Concerning the choice of oil and its suit
ability at different air temperatures,
please refer to your Husqvarna dealer.
ALWAYS TOP UP WITH FUEL AND CHAIN LUBRICANT AT
C. Fit the chain around the drive sprocket and in the groove of the
bar. Start on the upper side of the guide bar.
Make sure that the cutting edges of the sawing teeth along the
top of the guide bar are facing towards the tip. Also check that
the drive links go down properly into the drive sprocket.
D. Tension the chain so it does not sag along the bottom of the
guide bar. Check that the chain and guide bar fit properly.
Fit the clutch cover and tighten the nut fingertight only.
Pull the chain a few turns around by hand and check that it
can move freely.
Mixing table 2%
Litres Points Litres Petrol in Petrol in Litres Petrol in Petrol in
of oil of oil of petrol
0.2
0.4 0.40 20 4.4 5.2 10 2.2 2.6
1.0 1.76 50 11.0
0.35 10
Imp. gallon US gallon
2.2
THE SAME TIME.
NOTE!
On no account waste oil should be used as this can damage the
oil pump.
Oil mixture:
Husqvarna Twostroke Oil 1:50 (2%).
Ordinary twostroke oil 1:25 (4%)
4%
of petrol
2.6 5 1.1 1.3
13.2
25 5.5 6.6
Imp. gallon US gallon
Chain brake activator “Swed-o-Matic” Maintenance of the chain brake
The Swed-o-Matic should release the chain brake at a certain load
on the guide bar tip.
Adjusting the release power
The distance between the Swed-o-Matic release screw and the
front handle (B) determines the release power. A smaller
gap means reduced release power.
The release power can be checked as follows: Push the guide bar
tip against a spring balance. With a 15" guide bar the chain brake
should be released at a load of 10-15 kp.
The forestry worker could make a rough check on the spot as follows:
Hold the saw horizontally over a trunk, at a height of abt 35 cm. As
the saw by force of its own weight swings around the rear handle
and hits the trunk, the brake should be released.
Note that during this check the engine must not be running. If the
brake is not released, contact your service workshop.
Nut M should be tightened completely.
Clean the brake band and the mechanism. Check that the band
has at least 0.75 mm thickness on the most worn part.
Lubricate the links and supports of the brake mechanism with twostroke oil. Release and lock the brake repeatedly to check that the
mechanism works smoothly.
Check the chain brake function regularly. Start the saw on clear
ground making sure that the chain runs freely. Apply full throttle
and release the chain brake. The chain should immediately stop
rotating. If not, contact your service workshop.
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