Checking The Safety Chain Brake; Adjusting The Carburetor - Makita DCS 330 TH Owner's And Safety Manual

Checking the chain brake
Do not work with the chain saw without first 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 firmly with one hand and hold the rear
handle with the other.
With the engine running at moderate speed, press the hand
guard (L/6) 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 for repair.

Adjusting the carburetor

Important information:
The carburetor of this tool is fitted with limiter caps which restrict
the range of adjustment and prevents over-rich mixture
settings. This ensures providing good engine power and
efficient fuel consumption.
Before installing the limiter caps, the manufacturer performs
the „Basic Adjustment" procedure.
Optimum perfornance can only be achieved if the carbure-
tor is adjusted correctly. For this work, which should be
carried out by an expert, the engine must be warmed up
and the air filter clean.
It is urgently recommended to use a revolution indicator (8)
(accessorie, not delivered with the chain saw) in order to
achieve a correct adjustment of the carburetor. Adjust the
carburetor using a 0.16" (4 mm) screwdriver.
The screwdriver shown (7) (accessorie, not delivered with the
chain saw) has a molded-on lug to assist in adjustment.
Before adjusting the carburetor the engine must be warmed
up for a period of 3-5 min.
For adjusting the carburetor correctly the following
steps must be carried out:
1. Check adjustment
2. Start engine
3. Set idle speed
4. Adjust speed
5. Check idling speed
6. Check acceleration
7. Check max. speed or output
8. Repeat adjustment procedure starting with step 3, until
idling speed, max. speed and acceleration are reached
with the adjustment made.
9
10
11
Adjustment instructions (step 1)
Before initial operation make sure that the adjusting screws
(9 and 10) have not been set in all the way. Limiter caps do
not protect the engine from leaning.
Turn the two adjusting screws (9 and 10) counter-clock-
wise as far as they will go.
STOP
Start the engine and let it warm up (step 2).
Set idle speed (step 3)
If the chain turns when the engine is idling, unscrew the
throttle-valve stop screw (11) until the chain stops. If the
engine runs unevenly, screw the screw (11) back in.
Idling speed should be 2,800 rpm.
7 8
HL
IDLE
STOP
6
C
D
25