Checking The Chain Lubrication; Adjusting The Carburetor - Dolmar PS-33 Instructions D'emploi

Checking the chain lubrication

D

Adjusting the carburetor

2
E
Carburetor adjustment is necessary for optimum engine
performance, for safer and more economical operation.
The engine should be warm, the air filter clean, and the
chain properly tensioned. Have carburetor adjustment
done by an authorised DOLMAR service centre.
The carburetor is factory-adjusted for the air pressure at sea
level. At other elevations or under other conditions of weather,
temperature, or humidity, or when breaking in a new engine, it
may be necessary to make slight adjustments to the carburetor.
You will need a tachometer (E/1) (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!
If not using a tachometer, do not go below the specified
basic setting of the main nozzle (H). Doing so may cause
engine damage due to overheating and insufficient
lubrication!
Adjust the carburetor using a 4 mm screwdriver. The screw-
driver shown (E/2) (part No. 944 340 001) has a molded-on
lug to assist in adjustment.
Before undertaking the adjustment, run the engine for 3-5
minutes to warm it up, but not at high speed!
For proper adjustment, proceed as follows:
1. Basic setting (engine off)
Start engine and let it warm up.
2. Set idle
3. Set maximum permissible speed
4. Check acceleration
5. Check idle speed
Repeat steps 2-5 until you get the right idle speed, good
acceleration and maximum permissible speed.
Never work with the chain saw
lubrication. Otherwise the service life of the chain and guide
bar will be reduced.
Before starting work check the oil level in the tank and the oil
feed.
Check the oil feed rate as described below:
- Start the chain saw.
- Hold the running chain saw approx. 15 cm above a trunk or
the ground (use an appropriate base).
If the lubrication is sufficient, you will see a light oil trace because
oil will be flung off the sawing device. Pay attention to the
direction the wind is blowing and avoid unnecessary exposure
to the oil spray!
1
F
1. Basic setting
Carefully turn the adjusting screws for the main nozzle (H)
and idle nozzle (L) clockwise until you feel a stop.
Turn adjusting screws (H) and (L) 1 turn counter-clockwise.
2. Set idle
Set the idle speed per the technical specifications.
Turning the adjusting screw (speed) in (clockwise) increases
the idle speed. Turning it out (counter-clockwise) lowers the
idle speed. In no case should the chain move.
3. Set maximum permissible speed
Set the maximum speed by minimal adjustments of the
adjusting screw (H) in accordance with the technical
specifications. Turning the adjusting screw (H) clockwise
increases the speed, turning it counter-clockwise reduces the
speed.
4. Check acceleration
When the throttle is pressed, the engine should go smoothly
from idle to high speed.
If this is too slow, turn the adjusting screw (L) in small (max.
1/8 turns) increments counter-clockwise.
5. Check idle speed
Check the idle speed after setting the top speed (the chain
must not move).
Repeat the adjustment procedure starting at Step 2, until the
engine runs with the correct idle speed, good acceleration,
and maximum permissible speed.
withoute sufficient chain
speed
H
L
15