Stihl FS 131 Review
For tough land and heavy use: a 36.3 cc, 1.4 kW 4-MIX brush cutter with a bike handle, 5.8 kg and a 420 mm cut — Stihl's semi-pro petrol benchmark.
In short:The Stihl FS 131 is a semi-professional petrol brush cutter with a 36.3 cc 4-MIX engine (a four-stroke that runs on two-stroke mix) producing 1.4 kW, an Easy Start system with automatic decompression, a bike (cow-horn) handle, a 0.71 L fuel tank and a 420 mm cut with a line head. It weighs 5.8 kg without guard or cutting attachment. It suits large plots, thick brambles, scrub and regular heavy clearing.
You'll be sent to the official STIHL website for your country — STIHL isn't sold on Amazon.
Pros
- 4-MIX engine: strong low-speed torque for blades
- Handles thick brambles and scrub with the right blade
- Semi-pro durability for regular heavy sessions
Cons
- Price is a real step up
- Heavier and more machine than a small lawn needs
- Bike handle and power demand a bit more technique
The Stihl FS 131 is where Stihl’s range crosses from “homeowner” into semi-professional. The 36.3 cc 4-MIX engine delivers strong, usable torque — exactly what a brush blade needs to power through brambles, scrub and dense woody growth without bogging down.
What UK dealers specify
UK Stihl dealers list the FS 131 with a 36.3 cc 4-MIX engine producing 1.4 kW, Easy Start with automatic decompression, a bike (cow-horn) handle, a 0.71 L fuel tank, a 420 mm cut with a line head and a weight of 5.8 kg without guard or cutting attachment. Don’t confuse it with the FS 131 R, which has a loop handle. We found no current Amazon.co.uk listing, so buy through a Stihl dealer.
Who it’s for
Big plots, neglected land, thick brambles, and anyone clearing regularly enough that a homeowner machine would wear out. If the FS 70 C-E runs out of grunt on your worst patches, this is the answer. Overkill for a tidy lawn.
Verdict
The benchmark semi-pro petrol brush cutter. Expensive, but if your land genuinely demands it, nothing in the homeowner class comes close.
The semi-pro petrol benchmark — expensive, but if your land genuinely has thick brambles and scrub, nothing in the homeowner class keeps up.
Stihl FS 131 — frequently asked questions
Is the Stihl FS 131 overkill for a normal garden?
Yes. It's a 36 cc semi-pro machine built for brambles, scrub and heavy regular use. For a tidy lawn, a lighter model like the FS 70 C-E or a cordless machine is a better fit.
What is the 4-MIX engine?
4-MIX is Stihl's four-stroke engine that still runs on two-stroke fuel mix (petrol plus two-stroke oil, which also lubricates the valve gear). Stihl designs it for strong low-speed torque and lower exhaust emissions than a conventional two-stroke. See 2-stroke vs 4-stroke.
What blade should I use for brambles on the FS 131?
A 3-tooth or 4-tooth metal blade for brambles and scrub; a circular-saw blade for saplings and woody stems, used with the matching guard and a full harness. See the best brush cutter blades.
Our score
8.7/ 10
The semi-pro petrol benchmark — expensive, but if your land genuinely has thick brambles and scrub, nothing in the homeowner class keeps up.
Who this one is for
Large plots, brambles, scrub and regular heavy clearing — semi-pro use.
Guides that feature it
Price and availability
Details checked on October 26, 2026.
Sources
Specifications: manufacturer sheet and Amazon product page. Prices and availability: Keepa. No product on this site has been physically tested.
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