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38 – English
1
Empty the fuel tank.
2
Remove the following:
• cylinder cover
• air filter
• clutch cover
• chain and guide bar
• starter assembly
• cable guide
3
Disconnect the fuel hose from the carburettor.
4
Fuel tank – removal
WARNING!
The fuel used in chainsaws is
harmful if inhaled, may cause
skin irritation and is highly flam-
mable.
Disconnect the pushrod from the carburettor by
first carefully prising up the spring over the end of
the rod, where it connects to the throttle lever (A).
Then press the throttle lever forwards (B) while
pressing the throttle pushrod backwards (C) and
lifting it off the lever. Withdraw the throttle pushrod
from the tank and lift it upwards without pulling it
through the rubber inlet manifold.
C
A
B
Repair instructions
Fine adjustment of idling speed T
• The idling speed is adjusted using the screw
marked T.
• If adjustment is necessary, screw in the idling
screw T until the chain starts to turn. Then screw it
out until the chain stops moving.
• The idling speed is correctly set when the engine
runs smoothly in all positions and there is a clear
margin to the speed at which the chain starts to
move.
High speed jet H
• The high speed jet H influences the saw power
output and engine speed. If the H jet is set too
weak the saw will over-rev, which could cause
engine damage.
• Run the saw at full throttle for about 10 seconds.
H=1.
• Then screw out the H screw 1/4 turn. H=1 1/4.
• Run the saw again at full throttle for about 10
seconds and listen to the difference in the engine
note. Repeat this procedure again with the H
screw screwed out another 1/4 turn. H=1 1/2.
• You have now run the saw at settings H ± 0, H =
+1/4 and H = +1/2 from the factory setting. At full
throttle the engine will sound different at each
setting.
• The H screw is correctly adjusted when the saw
“burbles” a little at full throttle without any load.
• If there is a lot of smoke from the silencer and the
saw does not run smoothly then the setting is too
rich.
• Screw in the H screw to the setting that sounds
right.
NOTE!
For optimum adjustment, a tachometer
should be used. The recommended maxi-
mum speed should not be exceeded.
Carburettor – correct adjustment
• When the carburettor is correctly adjusted the saw
should accelerate without hesitation and the
engine will burble a little at full throttle without any
load.
• The chain must not turn when idling.
• If the L screw is set too weak this can make the
saw difficult to start and cause poor acceleration.
• If the H screw is set too weak the saw will produce
less power, poor acceleration and there is a risk of
engine damage.
• If either the L or H screws are set too rich it will
cause acceleration problems or too low working
speed.