Adjusting
the
carburetor
NOTE:
The grinding parts are equipped with an electronic ignition to limit the speed. The carburetor also has a fixed jet which
cannot be adjusted.
At the factory the idling speed has been set to approx.
2,300
l/min., but the running-in process
of
a new engine may require
slight readjustment
of
the idling speed.
I
Set the idling speed with a screwdriver (width of blade:
4
mm).
Thescrewdrivershown (A/1) (order number 944340001) hasa
molded-on lug to assist in adjustment.
For correct adjustment
of
the idling speed the following
steps must be carried out:
1.
Start the engine and run it until
it
is warm (about 3
-
5 minutes).
2.
Switch off the engine.
STOP
0
3.
Remove the cover with the air filter.
-
Unscrew the two screws
(B/2)
to the left and right on the cover
(B/3).
CAREFUL!
This exposes the carburetor intake! Dust or
dirt particles that get into the carburetor can ruin the
engine! Make sure your clothing is free of dust and dirt
particles, your tools are clean, and the working area is
clean.
Do
not
lay a cloth or similar material on the
carburetor intake opening!
4.
Starttheengine
I,
5.
Readjust the idling speed.
-
If the cut-off disc is still turning when the engine is running,
unscrew the adjusting screw of the throttle valve (C/4) until
the cut-off disc
is
no longer turning. When the engine is left
running at idling speed, loosen the screw a little.
Now the acceleration from idling speed to maximum speed
must be tested byabruptlyoperating the throttle lever.
If
the
acceleration is too slow, the idling speed jet screw (C/5) must
be loosened slightly (max. 1/8 of a revolution) and the throttle
valve adjusting screw (C/4) tightened slightly.
-
If
the engine cannot be adjusted as described under point
5,
a basic adjustment must be carried out with the engine
switched off.
6.
Basicadjustment
-
@
Carefullyscrew the idling speed jet screw (C/5) to the right (in
a clockwise direction) until it comes to a noticeable stop.
Now unscrew the adjusting screw approx. 1 1/8 of a revolu-
tion to the left (in an anti-clockwise direction).
-
-
Starttheengine.
+$
?+
-
The idling speed and the acceleration can be corrected by
turning the idling speed jet screw (C/5). Turn in the screw to
speed up, and turn out the screw to speed down the engine.
After adjusting the carburetor
it
is
absolutely essential to
replace the cover with the air filter
(B/4).
16
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