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String Trimmers

HUSQVARNA 525L

 
 
 
 
 
 
 
 
 
 
 
1.21 hp
Output shaft power1
18.1 in
Cutting width
9.7 lbs
Weight (excl. cutting equipment)
 
HUSQVARNA 525L - 966 78 17‑01
Included
  • Trimmer head
    T35 M10
Not Included
  • Harness
  • Saw blade
  • Grass blade
Shipping & Returns

Husqvarna aims to deliver orders promptly, so changes or cancellations are not accepted once an order is placed.

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Husqvarna offers a refund for online purchases if you are not satisfied, minus any shipping or restocking fees.

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Warranty

At Husqvarna, we're committed to ensuring your satisfaction. Our warranty covers any defects in material or workmanship under normal use during the warranty period.

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Light and easy-to-use grass trimmer

Stay on the cutting edge of your professional maintenance work. The Husqvarna 525L is a robust, durable trimmer that’s intended for daily use by hardworking landscapers. Easy to maintain and service, this straight shaft trimmer features pro-grade components and intuitive controls. Plus, our patented X-Torq® engine means more power and less fuel consumption and emissions compared to conventional engines.

Features

Specifications

Compare specifications and features with similar Husqvarna products.
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HUSQVARNA 525L
966 78 17‑01
Capacity

Cutting width

18.1 in
HUSQVARNA 525L
966 78 17‑01
Dimensions

Weight (excl. cutting equipment)

9.7 lbs

Product size length

70.43 in

Tube diameter

0.94 in

Product size height

8.74 in

Product size width

9.53 in

Tube length

58.386 in
HUSQVARNA 525L
966 78 17‑01
Engine

Output shaft power

1
1.21 hp

Cylinder displacement

25.4 cm³

Maximum rpm output shaft

6,500 rpm

Fuel tank volume

17.25 fl oz

Fuel tank volume

0.51 l

Clutch engagement speed (±120)

4,000 rpm

Electrode gap

0.03 in

Fuel Consumption

600 g/kWh

Idling speed

3,000 rpm

Maximum power speed

8,500 rpm

Spark Plug

NGK BPMR8Y

Torque, max.

1.2 Nm

Torque, max. at rpm

6,000 rpm
HUSQVARNA 525L
966 78 17‑01
Equipment

Gear ratio

19

Drive gear angle

30 °

Harness

Not included

Saw blade

Not included

Trimmer head

T35 M10

Grass blade

Not included
HUSQVARNA 525L
966 78 17‑01
Sound and noise

Sound power level, guaranteed (LWA)

107 dB(A)

Sound pressure level at operators ear

98 dB(A)
HUSQVARNA 525L
966 78 17‑01
Vibration

Equivalent vibration level (ahv, eq) front handle

3 m/s²

Equivalent vibration level (ahv, eq) rear handle

2.8 m/s²
HUSQVARNA 525L
966 78 17‑01
Lubricant

Lubricant type (Engine)

Husqvarna 2 stroke or equiv. at 50:1
HUSQVARNA 525L
966 78 17‑01
Emission

Exhaust emissions (CO average) EPA

281 g/kWh

Reviews

Services

Owner support

Manuals, handbooks, spare parts, guides, and related information for 525L can be found in the product support.
Product support for 525L
Disclaimer:
  • 1Output shaft power: Petrol products - Net power rating as per ISO 8893, Battery products measured comparable to petrol products

Frequently asked questions

What is the fuel mix ratio for the Husqvarna 525L?

The Husqvarna 525L requires a 50:1 gasoline to 2-stroke oil ratio. For optimal engine life and performance, it is recommended to use Husqvarna XP+ 2-Stroke Oil or a high-quality JASO FD certified oil mixed with 89 octane unleaded gasoline (maximum 10% ethanol).

How does the Husqvarna 525L compare to the Stihl FS 91?

While both are professional-grade trimmers, the Husqvarna 525L (9.7 lbs) is significantly lighter than the Stihl FS 91 (12.8 lbs), reducing operator fatigue during long shifts. The 525L features the X-Torq® engine for lower emissions, while the FS 91 utilizes a 4-Mix engine. Landscapers often choose the 525L for its superior power-to-weight ratio and intuitive "Smart Start" technology.

What size trimmer line does the Husqvarna 525L use?

The Husqvarna 525L comes standard with the T35 Tap’n Go head and is optimized for .065 inch - .105 inch diameter trimmer line. Using Husqvarna Titanium Force™ line provides maximum durability and cutting efficiency for professional landscaping tasks.

Can the Husqvarna 525L be used with a brush blade?

Yes. While it comes with a trimmer head, it is compatible with Husqvarna grass blades and brush blades (like the 4-tooth grass blade) with the appropriate mounting hardware and guard.

How do I start the Husqvarna 525L after it has been sitting?

The 525L is equipped with a Smart Start® engine and an air purge bulb. To start, press the air purge bulb 6 times until fuel is visible, set the choke to the "on" position, and pull the starter cord. Once the engine fires, move the choke to the halfway point and pull again. The auto-return stop switch automatically resets to the "ON" position for easier subsequent starts.

What makes the 525L "Professional Grade" compared to consumer models?

Unlike residential trimmers, the 525L features a commercial-grade 2-stage air filter, a forged 3-piece crankshaft, and a heavy-duty bevel gear designed for all-day use. These components allow the 525L to maintain high torque under load, ensuring a longer product lifespan in demanding environments compared to standard homeowner units.

Is the Husqvarna 525L shaft compatible with attachments?

The Husqvarna 525L features a fixed straight shaft designed for maximum durability and weight reduction in professional trimming applications. It is not a "detachable" shaft system. For a multi-purpose tool that accepts hedge trimmer or edger attachments, professionals should look at the Husqvarna 525LK or other LK-series combi-tools.

How often should I clean the air filter on the 525L?

For professional use in dusty conditions, the air filter should be inspected daily and cleaned every 25 hours of operation. The 525L’s easy-access cover allows for quick maintenance. Replacing the filter every season (or more frequently in high-debris environments) ensures the X-Torq® engine maintains peak fuel efficiency and power.

Does the Husqvarna 525L have high vibration levels?

No. The 525L is engineered with LowVib® technology, utilizing effective anti-vibration dampeners that absorb engine and cutting-attachment vibrations. This reduces the physical strain on the operator’s arms and hands during extended commercial use, making it one of the most ergonomic professional trimmers in its class.

What is the warranty for the Husqvarna 525L for commercial use?

When purchased for professional or commercial use, the Husqvarna 525L typically carries a two-year limited warranty. However, users can often extend their engine protection by purchasing Husqvarna-brand pre-mixed fuel at the time of equipment purchase. Always check with your local authorized dealer for current regional warranty programs.

About string trimmers

Dependable, lightweight and well-balanced, Husqvarna has the best battery string trimmer and gas trimmer lineup for homeowners and commercial landscapers.

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