Description
The STIHL FSB-KM curved-shaft strimmer attachment converts a compatible STIHL petrol KombiEngine into a lightweight grass trimmer for lawn edges, borders and difficult-to-reach spaces.
Its curved shaft provides good control around trees, flower beds, fences, paths and garden furniture, while the supplied STIHL AutoCut C 6-2 mowing head uses a convenient tap-to-feed line system. The FSB-KM is an attachment only: a compatible KombiEngine is required and sold separately.
Important: The FSB-KM is compatible only with the STIHL KM 56, KM 94 and KM 111 KombiEngines. It is not suitable for STIHL KMA cordless KombiMotors or the KM 131 R.
Key benefits of the STIHL FSB-KM
- Curved shaft: Provides manoeuvrable handling when trimming around borders, trees, walls and other obstacles.
- AutoCut C 6-2 mowing head: Twin-line mowing head with tap-to-feed line advancement for straightforward grass trimming.
- Lightweight attachment: Weighs approximately 0.7 kg, helping to keep the complete KombiSystem manageable during detailed work.
- Compact 77 cm length: Well suited to smaller gardens, confined areas and precise finishing work.
- Quick attachment changes: Connects to a compatible STIHL KombiEngine through the KombiSystem coupling.
- Ideal for light grass maintenance: Suitable for lawn edges, borders and areas missed by a lawn mower.
Which STIHL KombiEngines fit the FSB-KM?
The FSB-KM has a more limited compatibility range than many other STIHL KombiTools. Check your power unit before ordering.
| STIHL power unit | FSB-KM compatibility |
|---|---|
| STIHL KM 56 RC-E | Compatible |
| STIHL KM 94 R-CE | Compatible |
| STIHL KM 111 | Compatible |
| STIHL KM 131 R | Not compatible |
| STIHL KMA 80 R | Not compatible |
| STIHL KMA 120 R | Not compatible |
| STIHL KMA 135 R | Not compatible |
| STIHL KMA 200 R | Not compatible |
For help checking your existing engine, contact the Masseys garden machinery team before ordering.
STIHL FSB-KM technical specifications
| Manufacturer | STIHL |
|---|---|
| Model | FSB-KM |
| Product type | Curved-shaft strimmer KombiTool attachment |
| Supplied mowing head | STIHL AutoCut C 6-2 |
| Approximate attachment weight | 0.7 kg |
| Approximate overall length | 77 cm |
| Manufacturer part number | 4137 740 5008 |
| GTIN / EAN | 0886661449866 |
| Compatible power units | STIHL KM 56, KM 94 and KM 111 KombiEngines |
| Power unit included | No – compatible KombiEngine required |
What is the STIHL FSB-KM best used for?
The FSB-KM is designed primarily for lighter grass trimming and detailed finishing work, including:
- Trimming lawn edges and borders.
- Cutting grass around trees and posts.
- Maintaining areas beside fences and walls.
- Working between flower beds and garden features.
- Reaching grass that a lawn mower cannot cut.
- Maintaining narrow or restricted garden areas.
For sustained mowing over larger areas, thicker vegetation or customers using a cordless KMA motor, consider the STIHL FS-KM straight-shaft strimmer attachment instead.
STIHL FSB-KM or FS-KM?
| Feature | STIHL FSB-KM | STIHL FS-KM |
|---|---|---|
| Shaft design | Curved shaft | Straight shaft |
| Standard mowing head | AutoCut C 6-2 | AutoCut C 26-2 |
| Best suited to | Light grass, lawn edges and confined areas | Larger areas and more regular grass trimming |
| Handling | Compact and lightweight | Longer reach and more substantial cutting setup |
| Engine compatibility | KM 56, KM 94 and KM 111 only | Compatible with a wider selection of STIHL KombiEngines |
Browse the complete STIHL KombiSystem range or read our STIHL KombiSystem buying guide to compare power units and attachments.
Why buy the STIHL FSB-KM from Masseys?
Masseys is an authorised STIHL dealer based in Woodville, Swadlincote. Our experienced garden machinery team can help you confirm attachment compatibility and choose the correct STIHL KombiEngine, mowing head and cutting line for your work.
- Genuine STIHL KombiTool attachment.
- Practical compatibility advice before purchase.
- Local garden machinery workshop and aftersales support.
- Collection from our Swadlincote store.
- Access to the wider STIHL garden machinery range.
STIHL FSB-KM frequently asked questions
Which engines are compatible with the STIHL FSB-KM?
The STIHL FSB-KM is compatible only with the STIHL KM 56, KM 94 and KM 111 petrol KombiEngines.
Can I use the FSB-KM with a STIHL KMA cordless KombiMotor?
No. The FSB-KM is not compatible with STIHL KMA cordless KombiMotors, including the KMA 80 R, KMA 120 R, KMA 135 R and KMA 200 R. Consider the STIHL FS-KM attachment for a compatible alternative.
Does the FSB-KM include a KombiEngine?
No. This listing is for the FSB-KM attachment only. A compatible STIHL KM 56, KM 94 or KM 111 KombiEngine is required.
Which mowing head is supplied with the FSB-KM?
The FSB-KM is supplied with a STIHL AutoCut C 6-2 twin-line mowing head. The cutting line can be advanced by tapping the mowing head on the ground while it is rotating.
What is the difference between the FSB-KM and FS-KM?
The FSB-KM has a lightweight curved shaft and smaller AutoCut C 6-2 head, making it particularly suitable for precise work in confined spaces. The FS-KM has a straight shaft, larger AutoCut C 26-2 head and wider engine compatibility, making it a better option for larger areas and more regular trimming.
Is the FSB-KM suitable for brambles and heavy scrub?
The FSB-KM is primarily intended for grass trimming and light garden maintenance. For dense vegetation, heavy weeds or sustained clearing work, choose a suitable straight-shaft brushcutter attachment and confirm that it is approved for your KombiEngine.
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