McCulloch PROMAC 33 - Manual (Page 10)

ENGLISH - 4
IMPORTANT
Never start or operate unless bar and chain are properly
installed. Before starting always move the saw away from the
fuelling area and place it on a firm, flat surface, the guide bar
to the front.
STARTING A COLD ENGINE
1 Check that the chain brake is in the disengaged position
moving the lever (L) towards the front handle.
Move the stop switch upwards .
2 Slide the choke lever (A) to the CLOSED position (OUT).
Press the primer bulb (C) several times.
3 Depress throttle trigger lock out (S). Depress throttle trig-
ger (G) and then operate throttle advance (P) moving it
backwards.
4 Hold the saw firmly as shown in illustration and pull the
starter rope until the engine fires once.
Beware of moving chain!
5 Move choke lever (A) to the OPEN position (IN). Push the
decompression valve (D) down if your models is fitted with
one.
Pull the starter rope until the engine starts.
Allow engine to warm up for ten seconds for better cutting
performance.
Squeeze the throttle trigger (G) to release the throttle
advance.
If engine fails to start, repeat these instructions.
6 The engine is stopped by depressing the STOP switch to
STOP position.
After lengthy use of the chain at full speed,we recommend
to run the engine for a few seconds at idle speed before
stopping it.
STARTING A WARM ENGINE
Check that the ignition switch is not in the “stop” position
and do not use the throttle lock.
Hold the saw firmly, press valve (D) for decompression and
pull the starter rope.
STARTING A WARM ENGINE AFTER RE-FUELLING
In the fuel tank as run completely dry, procede to start as
with a cold engine.
IMPORTANT
Before using a chain saw read the Operator’s Manual and all
safety precautions carefully.
FELLING TREES
– Make sure that there are no bystanders or animals in the
work area.
– Study the direction of the fall of the tree and then plan your
exit path away from the planned direction of fall.
– Don’t fell trees when there is a strong wind.
1 Clear the tree base of interfering limbs and brush. Clean
the work area from stones or other objects which could
damage the chain. If the tree has large protruding roots,
remove them before felling (see illustrations).
2 A) Cut a felling notch (A) of 45°on the side you want the
tree to fall to a depth of about one third of the trunk
diameter (d). Then make a felling cut (B) about 5 cm
higher than the felling notch on the opposite side of the
tree. Make sure that the felling cut does not go right
through the trunk. A hinge (C) must always be left to
provide control over the direction of the fall.
B) Use wedges to control the moment and direction of the
fall.
3 When the tree starts to fall, walk away along your pre-
planned escape path.
CUTTING FALLEN TRUNKS
4 A) Limbing thick branches. For limbing and bucking
leave the lower limbs to support the log off the ground.
B) Supported at one end only. Begin with a bottom cut
made by the upper side of the bar (A); the depth of the
cut should be about one third of the log diameter.
Finnish with a top cut (B) meeting the first one. With
this technique splitting, cracking can be avoided
C) Supported at both ends. Begin with a top cut about
one third of the log diameter. Then finish with a bottom
cut (B) meeting the first one. this technique avoids the
risk of pinching the bar in the log.
D) If the log is supported along its whole length it may be
cut normally from above. Take care not to touch the
ground with the chain.
• When working on a slope always stand on the uphill.
• When cutting prepared timber, use clamps or chocks to
secure work.
• Use extreme caution when cutting small size brush and
saplings which may catch the chain and pull you off balance.
F. Usage
E. Starting and stopping
G. Carburettor adjustment
We suggest carburetor adjustments are made by an author-
ized servicing dealer.
The carburetor has three adjustment screws:
• L: The needle screw L governs the fuel flow at low speed
and also the acceleration from low to full speed.
To set screw L: close screw L turning it clockwise without
forcing.
Then open screw 1 1/4 full turn (counterclockwise) .
If acceleration is not smooth, open another 1/4 turn to
increase fuel flow .
• H: The needle screw H governs fuel flow at high speed
(throttle valve fully open).
To set hi speed screw H: close screw H turning it clock-
wise without forcing .