Product Information
Pros & Cons
Product Description
Tackling overgrown grass, brush and young saplings in noise‑sensitive areas? The STIHL FSA 400 gives professionals fast progress with low fatigue. Its powerful EC motor, large 520 mm cutting circle and ergonomic bike handle help you clear large areas efficiently while staying in full control.
Built for daily professional use, it combines rugged construction with smart energy management. Three-step speed control lets you match power to the task and extend runtime, while the STIHL anti‑vibration system keeps the machine comfortable through long shifts.
Where it excels
- Rapid clearance of tall, dense grass around verges and embankments
- Removing brush and wild growth along fences and tracks
- Forming and maintaining sight lines and paths
- Light pruning of small trees in young stand maintenance
Why it makes your work easier
- Big 520 mm sweep for fewer passes on open ground
- Three-speed control to save energy when full power isn’t needed
- Ergonomic bike handle for natural, rhythmic mowing on large areas
- Anti‑vibration system for noticeably less fatigue
In the field
Adjustment is quick and tool‑free via the clamping knob on the bike handle. The metal mesh air filter keeps the motor cool and is easy to clean. A robust housing, steel drive shaft, durable aluminium shaft and a greasing screw on the drive system all support a long service life. The unit hangs neatly on the 10‑point rail when stored, and it’s compatible with the STIHL Smart Connector 2 A for fleet tracking.
Power and key specs
- Battery system: ALLPRO/AP
- Nominal voltage: 36 V (max. 40 V)
- Power input: 2.60 kW; equivalent power: 2.0 kW
- Cutting circle: 520 mm
- Standard attachment: BrushCut 300‑3 / AutoCut 46‑2
- Overall length without cutting tool: 179 cm
- Weight without battery: 7.1 kg
- Sound pressure/sound power: 83 / 96 dB(A)
- Vibration left/right: 2.4 / 1.6–1.8 m/s²
- IPX4 splash protection; compatible with Smart Connector 2 A
- Typical runtimes per charge (application dependent): AP 300 S: 12–20 min (line), 16–30 min (plastic blades), 20–40 min (metal); AP 300.0 P: 15–25 / 20–40 / 25–50 min; AP 500 S: 15–25 / 20–40 / 25–50 min
Tip from gardenmachineshop.com
Use speed level 2 for most trimming and bump to level 3 only in heavy brush—this noticeably extends runtime without slowing your workflow.
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Specifications
| Brand | STIHL |
|---|---|
| Article number | FA092000044 |
| Barcode / EAN | 198520118197 |
| Battery system | ALLPRO/AP |
| Nominal voltage (V) | 36 |
| Max. voltage (V) | 40 |
| Power input (kW) | 2.60 |
| Equivalent power (kW) | 2 |
| Recommended battery | AP 300.0 P |
| Weight without battery (kg) | 7.1 |
| Cutting circle (mm) | 520 |
| Standard cutting attachment | AutoCut 46-2 / BrushCut 300-3 |
| Overall length without cutting tool (cm) | 179 |
| Sound pressure level dB(A) | 83 |
| Sound power level dB(A) | 96 |
| Vibration left (m/s²) | 2.4 |
| Vibration right (m/s²) - value 1 | 1.6 |
| Vibration right (m/s²) - value 2 | 1.8 |
| Min. runtime AP 300 S with line (min) | 12 |
| Max. runtime AP 300 S with line (min) | 20 |
| Min. runtime AP 300 S with plastic blades (min) | 16 |
| Max. runtime AP 300 S with plastic 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 (min) | 15 |
| Max. runtime AP 300.0 P with line (min) | 25 |
| Min. runtime AP 300.0 P with plastic blades (min) | 20 |
| Max. runtime AP 300.0 P with plastic blades (min) | 40 |
| 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 (min) | 15 |
| Max. runtime AP 500 S with line (min) | 25 |
| Min. runtime AP 500 S with plastic blades (min) | 20 |
| Max. runtime AP 500 S with plastic blades (min) | 40 |
| Min. runtime AP 500 S with metal tool (min) | 25 |
| Max. runtime AP 500 S with metal tool (min) | 50 |
| Anti‑vibration system | STIHL anti‑vibration system |
| Speed settings | 3-step |
| Motor type | EC motor |
| Protection rating | IPX4 |
| Connectivity | Compatible with Smart Connector 2 A |
| Handle | Ergonomic bike handle (double handle) |
| Air filter | Metal mesh filter |
Alternatives
No alternatives available at the moment.
More about this product
Highlights
- Nominal voltage: 36 V
- Max. voltage: 40 V
- Electrical power input: 2.60 kW
- Mechanical power: 2 kW
- Recommended battery: AP 500 S
- Weight without battery: 7.1 kg
Frequently asked questions
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