Husqvarna 545 RX Parts Manual

Husqvarna 545 RX Brushcutter manual cover

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Year 2021

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Husqvarna 545 RX Brushcutter Specification

The Husqvarna 545 RX Brushcutter is designed for professional use, offering a blend of power, efficiency, and ergonomics. It features a robust 45.7cc X-Torq engine that delivers high torque across a wide rpm range, ensuring optimal performance for demanding tasks. The X-Torq technology reduces emissions by up to 75% and increases fuel efficiency by up to 20%, making it an environmentally friendly choice.

The brushcutter is equipped with an ergonomic harness that distributes weight evenly, minimizing strain during prolonged use. Its design includes a high offset post that enhances maneuverability, allowing for precision in tight spaces. The LowVib anti-vibration system reduces fatigue by dampening vibrations, further improving user comfort.

The Husqvarna 545 RX features an adjustable handlebar for personalized ergonomics, accommodating different working postures. The controls are intuitively positioned for ease of use, including a stop switch that automatically resets to the ON position for trouble-free starting. It also includes a bevel gear designed with high torque and cutting equipment parallel to the ground for superior cutting performance.

Durability is a key aspect of the 545 RX, featuring a heavy-duty clutch and a robust construction that withstands tough conditions. The device also includes a combi-guard that can be used with both grass blades and trimmer heads, providing versatility for various applications.

Weighing approximately 8.9 kg (19.6 lbs) without cutting equipment, the Husqvarna 545 RX balances power with manageability. Its fuel tank capacity is 0.9 liters, allowing for extended operation between refills. This brushcutter is ideal for professionals seeking a reliable and efficient tool for large-scale maintenance and landscaping tasks.

Husqvarna 545 RX Brushcutter F.A.Q.

How do I start the Husqvarna 545 RX Brushcutter?

To start the Husqvarna 545 RX Brushcutter, set the choke to the start position, press the primer bulb several times until fuel is visible, pull the starter handle until the engine fires, then move the choke to the run position and pull again to start.

What should I do if the brushcutter doesn't start?

If the brushcutter doesn't start, check the fuel level, ensure the spark plug is clean and properly gapped, verify that the air filter is clean, and make sure the choke is set correctly.

How often should I replace the trimmer line on the Husqvarna 545 RX?

Replace the trimmer line whenever it becomes worn or breaks frequently. Depending on usage, this might be every few weeks or months. Always use the recommended line size for best performance.

What maintenance tasks should I perform regularly on the 545 RX Brushcutter?

Regular maintenance tasks include checking and cleaning the air filter, inspecting the spark plug, lubricating the gear head, and checking the fuel filter. Perform these tasks every 25 hours of operation or as needed.

How do I adjust the carburetor on the Husqvarna 545 RX?

To adjust the carburetor, locate the adjustment screws marked 'L', 'H', and 'T'. Adjust 'L' for low-speed mixture, 'H' for high-speed mixture, and 'T' for idle speed. Refer to the manual for specific settings and ensure the engine is running at operating temperature during adjustments.

What type of fuel should I use for the Husqvarna 545 RX Brushcutter?

Use a high-quality unleaded gasoline with a minimum octane rating of 90, mixed with 2% (50:1 ratio) of high-quality two-stroke oil. Avoid using fuel with more than 10% ethanol.

How do I replace the cutting attachment on the 545 RX?

To replace the cutting attachment, stop the engine and disconnect the spark plug. Use the locking pin to secure the shaft, then unscrew the attachment. Replace it with a compatible cutting tool, ensuring it is securely fastened before use.

What safety precautions should I follow when using the Husqvarna 545 RX Brushcutter?

Always wear protective gear such as goggles, gloves, sturdy footwear, and hearing protection. Ensure the work area is clear of bystanders and obstacles. Follow all safety instructions in the manual to avoid accidents.

How do I store the Husqvarna 545 RX Brushcutter during the off-season?

Clean the brushcutter thoroughly, drain the fuel tank, and run the engine until it stops to clear the carburetor. Remove the spark plug, add a few drops of oil into the cylinder, and pull the starter rope to distribute the oil before replacing the plug. Store in a dry, well-ventilated area.

What should I do if the brushcutter vibrates excessively during use?

Excessive vibration may be caused by a damaged or unbalanced cutting attachment. Stop the engine and inspect the attachment for damage or wear. Replace if necessary. Ensure the attachment is properly balanced and securely fastened.