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17
Checking the chain brake
Do not work with the chain saw without rst checking the
chain brake!
Start the engine as described (make sure you have a good
footing, and place the chain saw on the ground in such a way
that the guide bar is free of contact).
Grasp the tubular handle rmly with one hand and hold the grip
with the other.
With the engine running at moderate speed, press the hand
guard (7) in the direction of the arrow with the back of your
hand until the chain brake engages. The chain should stop
immediately.
Immediately release the throttle and release the chain brake.
IMPORTANT: If the chain does not stop immediately in this
test, do not under any circumstances proceed with work.
Contact a MAKITA service center.
C
7
D
8
9
Adjusting the carburetor
(only for EU-countries)
CAUTION:
Do not adjust the carburetor until the machine has been
completely assembled and checked! Do not adjust the
carburetor without a tachometer!
Carburetor adjustment is necessary for optimum engine
performance, for safer and more economical operation.
Adjust the carburetor only with the engine warm, a clean
air lter, and properly installed cutting tool.
Carburetor adjustment may be done only by a MAKITA
service centre. Improper adjustment can cause damage
to the engine.
In order to comply with new emissions legislation, limits have
been placed on the carburetor adjusting screws (H) and (L).
This limitation (to about 180 degrees) prevents an exces-
sively rich mixture. This in turn ensures compliance with
emissions rules as well as optimum engine performance and
economical fuel consumption.
You will need a tachometer (8, part No. 950 233 210) for
optimum adjustment. Exceeding the maximum permissible
speed can lead to overheating and under-lubricating, and
damage to the engine!
Factory setting of adjusting screws (H) and (L): Turned out
almost all the way (counterclockwise).
Use a screwdriver (9, blade width 4 mm, part No. 944 340 001)
to adjust the screws.
For proper adjustment, proceed as follows:
Checking adjusting screw (H)
Before starting the engine make sure that adjusting screw (H) is
turned out counterclockwise until it reaches a noticeable stop.
The limitations do not prevent excessively lean (under-lu-
bricated) running!
1. Start engine and let it warm up (3-5 minutes)
2. Set idle
3. Check acceleration
4. Set maximum permissible speed
5. Check idle speed
2. Set idle
Set the idle speed per the technical speci cations.
Turning the adjusting screw (S) in (clockwise) increases the
idle speed. Turning it out (counter-clockwise) lowers the idle
speed. The cutting tool must not rotate!
3. Check acceleration
When the throttle is pressed, the engine should go smoothly
from idle to high speed.
Turn adjusting screw (L) out (counterclockwise) in small
increments until acceleration is good.
4. Set maximum permissible speed
Set the maximum speed by minimal adjustments of the adju-
sting screw (H) in accordance with the technical speci cations.
Turning the adjusting screw (H) clockwise increases the
speed. Never exceed the maximum permissible speed!
5. Check idle speed
Check the idle speed after setting the top speed (the cutting
tool must not rotate!).
Repeat the adjustment procedure starting at Step 2, until the
engine runs with the correct idle speed, good acceleration,
and maximum permissible speed.
17


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