Husqvarna 266 - Manual (Page 4)

starting the chain saw
A. Cold engine
CAUTION!
I
Guide bar, chain and clutch cover must be assembled before
the engine is started, otherwise the clutch may come loose
and cause injuries.
Adjusting the carburettor
1. Switch on the ignition (push the switch to the left so that the 1
is visible).
2. Pull out the choke control.
3. Push down the throttle trigger lockout (A).
4. Open the throttle fully (B).
5. Push the throttle latch backwards (C).
Now all the controls are in starting position and the chain saw is
ready to be started.
6 Put your right foot on the plate beneath the rear handle.
7. Grasp the front handle with your left hand and press the saw
against the ground.
8. Grasp the starter handle with your right hand and pull out the
starting cord slowly until the starter pawl engage.
9. Give the starting cord a short sharp tug.
NOTE!
Do not pull the starting cord entirely out or release the starter
handle In pulled out position, as this can cause damages on the
chain saw.
10. Normally the engine will start after 2-3 starting attempts. Push
the choke control as soon the engine starts. Open rapidly the
throttle wide and the latch will disengage.
To stop the engine push the ignition switch to the right so that the
O is visible.
B. Warm engine
Use the same starting procedure as for cold engine but without
pulling out the choke control.
NOTE!
One of the most common causes of starting difficulties is that too
many starting attempts have been made with a closed choke flap.
If this is the case, remove the spark plug and wipe it dry. Open the
choke flap fully.
Before you reassemble the spark plug, we recommend you to pull
the starter handle several times to “ventilate the cylinder", the
ignition switch in 0-position.
Assemble the spark plug and make a new starting attempt with
open choke flap and full throttle.
The carburettor has three adjusting screws:
L = Low speed needle
H = High speed needle
T = Throttle adjusting screw
A. Basic setting
Clean the air filter.
Check the spark plug and its electrodes.
Check that the fuel filter is not clogged.
Screw the needles H and L carefully right in.
Then screw the needles out to recommended basic position:
H = 3/4 turn out, L = 1 turn out
Start the engine and warm it up. Adjust the idling speed by means
of the throttle adjusting screw to that speed at which the chain just
starts rotating.
B. Adjustment of L-needle
1. Screw in the L-needle slowly and the speed will increase. Screw
in the needle a little further and the speed will slow down again
as the fuel supply becomes too “lean". Notice the position of the
needle at the highest speed.
2. Open the L-needle again and notice the highest position. Note
that the speed slows down at “richer” supply.
3. Adjust the L-needle to the highest speed position. Then open it
equivalent to 10 min on a clock-face to obtain a somewhat
“richer” supply to aid acceleration.
4. By means of the T-screw, adjust the idling speed to 2.300-2.500
r/min, ensuring that the chain does not rotate when engine is
idling.
5. Give full throttle a couple of times to check that the engine
“responds”. If not, open the L-needle by abt 3 min. Check again.
C. Adjustment of H-needle
At correct adjustment of the H-needle the engine should be four-
stroking. Screw in the H-needle slowly until there is no more four-
stroking. Then screw the needle out equivalent to 10 min on a
clockface.
Check by means of a revolution counter that the high idle speed
does not exceed 11.500 r/min.