Husqvarna 525HF3S Operator's Manual
![Husqvarna 525HF3S Trimmer manual cover](/images/rXytFoxfrXlagxYkuhIGmDvw/thumbs/thumb175x175.webp)
To start the Husqvarna 525HF3S Trimmer, ensure the trimmer is on a flat surface, switch on the ignition, set the choke to the start position, press the primer bulb 6 times, then pull the starter rope until the engine fires.
Use a 50:1 ratio of unleaded gasoline to two-stroke oil. Ensure the gasoline is at least 89 octane and the oil is designed for air-cooled engines.
The air filter should be checked and cleaned every 25 hours of operation or more frequently if used in dusty conditions.
Regular maintenance includes checking and cleaning the air filter every 25 hours, inspecting the spark plug every 100 hours, and checking the fuel system regularly for leaks.
Check the fuel level and quality, inspect the spark plug for wear and correct gap, ensure the air filter is clean, and confirm the primer bulb is functioning properly.
Ensure you are using the correct trimmer line diameter and type. Avoid striking hard surfaces, and do not cut grass that is too thick or wet.
Check for damaged or unbalanced cutting attachments, loose parts, and ensure the engine is securely mounted.
To replace the trimmer line, remove the trimmer head cover, remove the old line, and thread new line through the holes, ensuring equal lengths on both sides. Reattach the cover securely.
The correct spark plug gap for the Husqvarna 525HF3S Trimmer is 0.6-0.7 mm (0.024-0.028 inches).
Drain the fuel tank, clean the trimmer thoroughly, remove the spark plug and add a few drops of oil into the cylinder, then pull the starter rope several times to distribute the oil. Store in a dry, cool place.