Q: How to adjust the carburetion of the DOLMAR PS-5105 chainsaw?

Before you begin , ensure that the engine is clean and free of debris. Wear appropriate protective equipment (gloves, safety glasses). The carburetion adjustment should be performed on a flat and stable surface. Most importantly, check that the chain does not rotate at idle: this is a crucial safety requirement. Your DOLMAR PS-5105 has three main adjustment screws: the S screw for idle, the L screw for low-speed acceleration, and the H screw for maximum speed. For optimal adjustment, start the engine and let it warm up for 3 to 5 minutes before beginning. Once the engine is warm, you can proceed with the adjustments. Idle adjustment (S screw) : Turn the S screw clockwise to increase the idle speed, or counterclockwise to decrease it. The engine should run smoothly and steadily. Important: the chain must absolutely not rotate at idle. If it does, reduce the idle with the S screw until it stops completely. Maximum speed adjustment (H screw) : Turn the H screw clockwise to increase the maximum speed. Adjust the H screw to the minimum according to the engine's technical specifications. Never exceed the maximum allowed speed. Once the maximum speed is reached, you will notice ignition interruptions: this indicates that the limit speed has been reached. Acceleration adjustment (L screw) : As soon as you operate the throttle, the engine should accelerate from idle to high speed without hesitation. Gradually unscrew the adjustment screw (L) by turning it counterclockwise until the engine accelerates well. After each adjustment, repeat the adjustment operations until you achieve a stable idle without chain rotation, smooth acceleration, and the correct maximum allowed speed. If you encounter difficulties or if the carburetor is clogged, consult an authorized DOLMAR dealer.

Question 1

How to adjust the carburetion of the DOLMAR PS-5105 chainsaw?

Accepted Answer

Before you begin, ensure that the engine is clean and free of debris. Wear appropriate protective equipment (gloves, safety glasses). The carburetion adjustment should be performed on a flat and stable surface. Most importantly, check that the chain does not rotate at idle: this is a crucial safety requirement.

Your DOLMAR PS-5105 has three main adjustment screws: the S screw for idle, the L screw for low-speed acceleration, and the H screw for maximum speed. For optimal adjustment, start the engine and let it warm up for 3 to 5 minutes before beginning. Once the engine is warm, you can proceed with the adjustments.

Idle adjustment (S screw): Turn the S screw clockwise to increase the idle speed, or counterclockwise to decrease it. The engine should run smoothly and steadily. Important: the chain must absolutely not rotate at idle. If it does, reduce the idle with the S screw until it stops completely.

Maximum speed adjustment (H screw): Turn the H screw clockwise to increase the maximum speed. Adjust the H screw to the minimum according to the engine's technical specifications. Never exceed the maximum allowed speed. Once the maximum speed is reached, you will notice ignition interruptions: this indicates that the limit speed has been reached.

Acceleration adjustment (L screw): As soon as you operate the throttle, the engine should accelerate from idle to high speed without hesitation. Gradually unscrew the adjustment screw (L) by turning it counterclockwise until the engine accelerates well.

After each adjustment, repeat the adjustment operations until you achieve a stable idle without chain rotation, smooth acceleration, and the correct maximum allowed speed. If you encounter difficulties or if the carburetor is clogged, consult an authorized DOLMAR dealer.

Question 2

Where is the start button on the DOLMAR PS-6400 chainsaw?

Accepted Answer

On the DOLMAR PS-6400 chainsaw, there is no single start button but rather a starting system made up of several elements located on the side and top of the device. The I/STOP ignition switch (16) is located on the side of the machine and must first be toggled to activate the ignition. The choke lever (17) is located right next to it and is pulled manually until it audibly clicks into place. The start handle (14) that operates the starting cable is also located on the side of the chainsaw.

To start cold, follow this precise procedure:

Place the chainsaw on stable ground and ensure that the chain does not come into contact with any objects.
Push the I/STOP switch from the OFF position to ON to activate the ignition system.
Pull the choke lever until you hear a click confirming it is engaged. This simultaneously activates the semi-automatic throttle governor.
Press the decompression valve (13) if your model is equipped with one to facilitate starting.
Pull firmly on the start handle until you feel resistance, then continue to pull slowly and gradually. Do not pull the cable out more than 50 cm and always gently return it by hand to avoid damaging the mechanism.
As soon as the engine starts, push the choke lever down and hold the rear handle (which releases the governor and allows the engine to run at idle).

For a hot restart, use the same procedure but briefly pull the choke lever (back and forth once) before pulling the start handle, as the engine only needs minimal enrichment of the mixture.

Refer to the complete user manual for more details on carburetor adjustments and essential safety procedures before starting your DOLMAR PS-6400.

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