Product Information
Pros & Cons
Product Description
Tight spaces, dense scrub, or young woodland to maintain? The STIHL FSA 400 K gives you the punch of a pro battery brushcutter with the control of a short shaft. It tackles brush, tall grass and thin saplings fast—without exhaust fumes or pull cords.
Built for daily professional use, it combines constant power with low vibration and smart ergonomics. You set the pace: choose from three speed levels to balance runtime and cutting power, and the LED shows when the energy-saving mode is active.
Where it excels
- Cutting back scrub and wild growth along paths and fences
- Maintaining young plantings and clearing thin stems
- Tall grass and rough areas in noise‑sensitive locations
- Working precisely in confined forest or roadside spots
Why it’s a standout
- Short shaft agility for tight, awkward terrain
- Constant Power delivers stable performance as the battery discharges
- Anti‑vibration system keeps fatigue low on long shifts
- Rugged build: steel drive shaft and aluminum protective shaft
Hands-on handling
The ergonomic bike handle adjusts tool-free for your stance. A sturdy 10-point hanging rail makes storage simple. The metal-mesh air filter cools the motor efficiently and cleans up easily. A distance guard helps you work close without snagging, and the lubrication screw in the drive system simplifies maintenance.
Capacity and key specs
- Nominal voltage: 36 V (ALLPRO/AP system)
- Max. voltage: 40 V
- Input power: 2.60 kW | Power (mechanical, comparable): 2 kW
- Recommended battery: AP 300.0 P
- Weight (without battery): 6.9 kg
- Overall length (without cutting tool): 168 cm
- Standard cutting attachment: Circular saw blade 200-22
- Sound pressure/power: 92 / 110 dB(A)
- Vibration left/right (right‑handed mode): 1.3 / 1.5 m/s²
- Runtime examples (per charge, indicative): AP 300 S: 12–20 min (line), 16–30 min (poly blades), 20–40 min (metal); AP 300.0 P: 15–25 min (line), 25–50 min (metal); AP 500 S: 15–25 min (line), 20–40 min (poly blades), 25–50 min (metal)
- Certified splash protection: IPX4
- Connectivity: Compatible with STIHL Smart Connector 2 A
Tip from gardenmachineshop.com
Match the speed level to the task: use lower speed to extend runtime in grass, then switch up for dense brush or saplings with the 200‑22 blade.
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Specifications
| Brand | STIHL |
|---|---|
| Article number | FA092000045 |
| Barcode / EAN | 198520118203 |
| Nominal voltage (V) | 36 |
| Max. voltage (V) | 40 |
| Input power (kW) | 2.60 |
| Power comparable (kW) | 2 |
| Battery system | ALLPRO/AP |
| Recommended battery | AP 300.0 P |
| Weight without battery (kg) | 6.9 |
| Standard cutting attachment | Circular saw blade 200-22 |
| Overall length without cutting tool (cm) | 168 |
| Sound pressure level (dB(A)) | 92 |
| Sound power level (dB(A)) | 110 |
| Vibration left in right-handed mode (m/s²) | 1.3 |
| Vibration right in right-handed mode (m/s²) | 1.5 |
| Min runtime AP 300 S with line head (min) | 12 |
| Max runtime AP 300 S with line head (min) | 20 |
| Min runtime AP 300 S with poly blades (min) | 16 |
| Max runtime AP 300 S with poly blades (min) | 30 |
| Min runtime AP 300 S with metal tool (min) | 20 |
| Max runtime AP 300 S with metal tool (min) | 40 |
| Min runtime AP 300.0 P with line head (min) | 15 |
| Max runtime AP 300.0 P with line head (min) | 25 |
| Min runtime AP 300.0 P with metal tool (min) | 25 |
| Max runtime AP 300.0 P with metal tool (min) | 50 |
| Min runtime AP 500 S with line head (min) | 15 |
| Max runtime AP 500 S with line head (min) | 25 |
| Min runtime AP 500 S with poly blades (min) | 20 |
| Max runtime AP 500 S with poly blades (min) | 40 |
| Min runtime AP 500 S with metal tool (min) | 25 |
| Max runtime AP 500 S with metal tool (min) | 50 |
| Certified splash protection | IPX4 |
| Connectivity | Compatible with Smart Connector 2 A |
| Constant Power | Yes |
| Power Boost function | Yes |
| Anti‑vibration system | Yes |
| Ergonomic bike handle | Yes |
| Speed control levels | 3 |
Alternatives
No alternatives available at the moment.
More about this product
Highlights
- Recommended battery: AP 500 S
- Rated voltage: 36 V
- Max. voltage: 40 V
- Input power: 2.60 kW
- Power: 2 kW
- Weight without battery: 6.9 kg
Frequently asked questions
Does this accessory fit my machine?
Is this a genuine STIHL product?
Where can I find the operating and safety instructions?
