Husqvarna H445 II Parts Manual

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Year 2020

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Husqvarna H445 II Chainsaw Specification

The Husqvarna H445 II Chainsaw is designed for efficient performance and durability, making it suitable for both residential and light professional use. This chainsaw is powered by a 45.7cc X-Torq engine, which delivers high power output while reducing fuel consumption and emissions, aligning with environmental regulations. The engine produces a maximum power output of 2.8 horsepower, providing sufficient cutting power for various tasks.

Equipped with a 20-inch bar, the H445 II is versatile enough to handle medium to large-sized trees and dense wood. The chainsaw features an advanced centrifugal air cleaning system that removes larger dust and debris particles before reaching the air filter, enhancing engine life and reducing maintenance frequency. It includes an adjustable oil pump, allowing the operator to control oil flow depending on application and weather conditions, ensuring optimal lubrication of the bar and chain.

The ergonomic design of the H445 II includes an anti-vibration system that reduces fatigue during extended use, promoting user comfort and control. The saw's body is constructed with durable materials to withstand harsh conditions, while its quick-release air filter facilitates easy cleaning and replacement. The Smart Start technology incorporated into the chainsaw minimizes starter cord resistance, enabling smoother and faster starting.

Safety features include an inertia-activated chain brake that reduces the risk of injury in the event of a kickback. The H445 II also boasts a combined choke/stop control, which aids in preventing engine flooding. Overall, the Husqvarna H445 II Chainsaw combines power, efficiency, and user-friendly features, making it a reliable choice for diverse cutting needs.

Husqvarna H445 II Chainsaw F.A.Q.

How do I properly start the Husqvarna H445 II Chainsaw?

To start the Husqvarna H445 II Chainsaw, first ensure the chain brake is engaged. Prime the engine by pressing the fuel pump bulb several times. Move the choke control to the full choke position and pull the starter handle until the engine fires. Then, move the choke to the half position and pull again until the engine starts. Finally, release the chain brake.

What is the correct fuel mixture for the Husqvarna H445 II Chainsaw?

The correct fuel mixture for the Husqvarna H445 II Chainsaw is a 50:1 ratio of unleaded gasoline to high-quality two-stroke engine oil. This ensures optimal performance and longevity of the engine.

How can I troubleshoot a chainsaw that won't start?

If your Husqvarna H445 II Chainsaw won't start, check the fuel level and ensure it's fresh. Inspect the spark plug for damage or fouling and replace if necessary. Ensure the air filter is clean and free from blockages. Finally, verify that the choke is in the correct position for starting.

How do I maintain the chain tension on my Husqvarna H445 II Chainsaw?

To maintain the chain tension, ensure the chainsaw is turned off and cooled down. Use the chain tensioning screw located on the side of the chainsaw to adjust the tension. The chain should be snug against the bar with slight play. Check the tension regularly to prevent accidents and ensure efficient cutting.

What regular maintenance should be performed on the Husqvarna H445 II Chainsaw?

Regular maintenance includes cleaning the air filter, inspecting and sharpening the chain, checking the chain tension, inspecting the spark plug, and cleaning the cooling fins. Additionally, ensure the fuel mixture is fresh and the chainsaw is properly lubricated.

How do I sharpen the chain on my Husqvarna H445 II Chainsaw?

To sharpen the chain, use a round file and file guide matching the chain specifications. File each cutter at a consistent angle, ensuring equal length and sharpness. Finish by filing down the depth gauges for optimal cutting efficiency. Always follow the manufacturer's guidelines for best results.

What is the recommended bar length for the Husqvarna H445 II Chainsaw?

The Husqvarna H445 II Chainsaw is compatible with bar lengths ranging from 13 to 20 inches, depending on the type of cutting tasks. Choose the bar length that suits your specific needs and follow the manufacturer's recommendations.

How do I clean the air filter on my Husqvarna H445 II Chainsaw?

To clean the air filter, remove the top cover and take out the filter. Wash it in warm, soapy water, rinse thoroughly, and let it dry completely. Reinstall the filter and cover, ensuring a secure fit to prevent dirt from entering the engine.

What safety precautions should I take when using the Husqvarna H445 II Chainsaw?

Always wear protective gear, including gloves, eye protection, ear protection, and chainsaw chaps. Ensure the chain brake is engaged when starting the chainsaw. Be aware of your surroundings and maintain a firm grip on the saw at all times. Follow all safety instructions provided in the user manual.

How can I troubleshoot a chainsaw that stalls during operation?

If the chainsaw stalls during operation, check for blockages in the air filter and clean it if necessary. Ensure the fuel mixture is correct and the fuel is fresh. Inspect the spark plug for fouling and replace it if needed. Also, verify that the carburetor settings are adjusted properly.