Husqvarna 120 Gas Powered Chainsaw Instruction Manual

1. Introducció

The Husqvarna 120 Gas Chainsaw is a lightweight, efficient, and user-friendly tool designed for various home and garden tasks, including cutting firewood, light felling, and limbing. This manual provides essential information for the safe and effective operation and maintenance of your chainsaw.

Característiques principals:

• 16-inch Bar: Ideal for a range of cutting tasks, recommended for use with bar lengths between 14 and 18 inches.
• Effortless Start-Up: Features an air purge system and combined choke/stop control to facilitate easier starting and reduce the risk of engine flooding.
• Rendiment superior: Powered by an efficient 38-cc, 1.8-HP X-Torq engine, which significantly reduces emissions (up to 60%) and improves fuel efficiency (up to 20%).
• Tecnologia d'injecció d'aire: A centrifugal air cleaning system that expels larger dust and debris particles before they reach the air filter, extending engine life and reducing filter maintenance.
• Tecnologia LowVib: Incorporates dampeners to reduce vibrations, minimizing operator fatigue and enhancing handling comfort.
• Fre de cadena activat per inèrcia: A critical safety feature designed to reduce the likelihood of injury due to kickback.

Figure 1: Husqvarna 120 Chainsaw featuring a 16-inch cutting bar and 38cc engine.

Figure 2: Illustration of the powerful and efficient X-Torq engine, highlighting reduced emissions and increased fuel efficiency.

Figure 3: Chainsaw in use, demonstrating the benefit of LowVib Technology for comfortable operation by reducing vibrations.

2. Informació de seguretat

Operating a chainsaw requires strict adherence to safety guidelines to prevent serious injury. Always wear appropriate personal protective equipment (PPE), including a helmet with hearing protection and face shield, safety glasses, heavy-duty gloves, chainsaw protective pants or chaps, and steel-toed boots.

Understanding Kickback and the Inertia Chain Brake:

Kickback is a sudden, upward and backward motion of the chainsaw that can occur when the tip of the guide bar (known as the kickback zone) contacts an object, or when the wood closes in and pinches the saw chain in the cut. The Husqvarna 120 is equipped with an inertia-activated chain brake designed to stop the chain instantly in such events, significantly reducing the risk of injury.

Always maintain a firm grip with both hands on the chainsaw handles. Ensure your footing is secure before starting any cut. Never operate the chainsaw above shoulder height. Be aware of your surroundings, including other people, animals, and potential obstacles.

3. Configuració

3.1 Muntatge:

Before first use, ensure the guide bar and chain are correctly installed. Refer to the detailed instructions in your product manual for specific assembly steps. Proper installation is crucial for safe and efficient operation.

3.2 Fuel and Oil Mixture:

The Husqvarna 120 uses a 2-cycle X-Torq engine and requires a specific fuel mixture. Mix unleaded gasoline with Husqvarna 2-stroke lubricant at a 50:1 ratio (2% oil). This means 2.6 US fluid ounces of oil per 1 US gallon of gasoline. Always use fresh fuel and store it in an approved container. The chainsaw has a 0.32 US pint (0.15 L) oil tank volume.

3.3 Starting Procedure:

1. Col·loqueu la motoserra sobre una superfície plana i ferma.
2. Activeu el fre de cadena empenyent el protector de mà davanter cap endavant.
3. Press the air purge bulb several times until fuel is visible.
4. Set the combined choke/stop control to the choke position.
5. Pull the starter cord firmly until the engine fires (usually 1-3 pulls).
6. Once the engine fires, move the choke/stop control to the half-choke position.
7. Estireu de nou el cordó d'arrencada fins que el motor arrenqui i funcioni.
8. Blip the throttle to disengage the choke, and the engine will return to idle.

Figure 4: Close-up of the air purge system, which removes air from the carburetor and fuel system for easy starting.

Figure 5: The independent choke/stop switch, designed to prevent accidental flooding and simplify starting.

3.4 Chain Tensioning:

A properly tensioned chain is essential for safe and effective cutting. The chain should be snug against the underside of the guide bar, but still able to be pulled around by hand. A simple tensioning system allows for quick adjustments. Refer to your full manual for detailed instructions on checking and adjusting chain tension.

4. Instruccions de funcionament

Always ensure the chain brake is disengaged before beginning to cut. Hold the chainsaw firmly with both hands, ensuring a balanced stance. Allow the chain to reach full speed before entering the wood.

4.1 Cutting Techniques:

• Enganxament: Cutting a fallen tree or log into shorter sections. Always ensure the log is stable and supported to prevent rolling or pinching the chain.
• Limbing: Removing branches from a fallen tree. Work from the base of the tree towards the top, cutting smaller branches first. Be cautious of branches under tension.
• Light Felling: For small trees, plan your felling direction carefully. Clear the area around the tree and ensure an escape route. Make a directional notch on the side of the tree in the direction of fall, then make the felling cut from the opposite side.

The LowVib technology in your Husqvarna 120 reduces vibration levels, minimizing operator fatigue during extended use and allowing for easier handling. This contributes to more precise and comfortable cutting.

5. Manteniment

Regular maintenance ensures the longevity and safe operation of your Husqvarna 120 chainsaw.

5.1 Neteja del filtre d'aire:

The Air Injection centrifugal air cleaning system helps keep the air filter cleaner for longer. However, regular inspection and cleaning of the air filter are still necessary. A dirty air filter can reduce engine performance and increase fuel consumption. Clean the filter with warm soapy water and allow it to dry completely before reinstallation.

Figura 6: Cutaway view illustrating the Air Injection Technology, which expels dust and debris for prolonged engine life.

5.2 Automatic Oiler:

The chainsaw is equipped with an automatic oiler that lubricates the chain and guide bar during operation. Regularly check the chain oil level and refill as needed with quality bar and chain oil. Never operate the chainsaw without chain oil, as this can cause severe damage to the bar and chain.

5.3 Chain Sharpening:

A sharp chain is crucial for efficient and safe cutting. A dull chain will cause the saw to work harder, produce fine sawdust instead of chips, and increase the risk of kickback. Sharpen the chain regularly or replace it when necessary. Refer to your full manual for detailed chain sharpening instructions.

5.4 Bugia:

Inspect the spark plug periodically. Clean or replace it if it is fouled, worn, or damaged. A properly functioning spark plug ensures optimal engine performance.

6. Solució De Problemes

Aquesta secció tracta els problemes habituals que podeu trobar amb la vostra motoserra.

6.1 Engine Not Starting:

• Comprovació de combustible: Ensure there is fresh, correctly mixed fuel in the tank.
• Air Purge: Confirm the air purge bulb has been pressed until fuel is visible.
• Posició d'estrangulació: Verify the choke/stop control is in the correct starting position.
• Bujía: Inspeccioneu la bugia per si hi ha brutícia o danys. Netegeu-la o substituïu-la si cal.
• Inundacions: If the engine is flooded, remove the spark plug, pull the starter cord several times to clear excess fuel, and then reinstall the plug and attempt to start without choke.

6.2 Poor Cutting Performance:

• Cadena apagada: Esmola o substitueix la cadena.
• Incorrect Chain Tension: Adjust the chain tension as described in the Setup section.
• Insufficient Chain Oil: Check the chain oil reservoir and refill if low.

For more complex issues, consult a qualified service technician or refer to the comprehensive troubleshooting guide in your full product manual.

7. Especificacions

8. Garantia i assistència

8.1 Product Warranty:

Husqvarna offers an extended warranty on select handheld products when purchasing 96 fluid ounces of Husqvarna pre-mixed fuel at the time of your product purchase. This can extend your warranty from 2 years to 5 years. Please retain your proof of purchase for both the chainsaw and the qualifying fuel.

8.2 Atenció al client:

For technical assistance, spare parts, or warranty claims, please contact Husqvarna customer support or visit your nearest authorized Husqvarna service dealer. Always refer to your complete product manual for detailed warranty terms and conditions.