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FS 131

FS 131
An improved and powerful bike-handle trimmer made for professional use, featuring great power and efficiency.

Product Description

Landscaping professionals looking for a simplified and convenient trimming solution will love the STIHL FS 131 trimmer. With its low-emission, 36.3 cc engine and a larger fuel tank than the previous model, the FS 131 delivers 30% longer run times. Its bike-handle design includes rubberized grips for enhanced grasp and comfort. The trimmer also features one touch stop and an easy, three-step starting procedure enabled by the semi-automatic choke lever. All of that, plus an improved air filtration and STIHL exclusive IntelliCarb™ technology. The cherry on top? The solid steel drive shaft accepts a wide range of heavy-duty cutting heads, including metal blades.

Model Features

  • Reduced-Emission Engine Technology - Caring for Nature
    The STIHL Inc. “Caring for Nature” seal identifies its powered products that are more environmentally conscious, producing zero or low exhaust emissions. STIHL Inc. defines “low exhaust emissions” as being cleaner than EPA and/or CARB exhaust emission standards.

    More information

  • Built in the USA
    Indicates products that are built in the United States from domestic and foreign parts and components.

    More information

  • Cutting Heads & Blades Selection Chart
    Need help selecting a cutting head or blade for your STIHL trimmer or brushcutter?

    Click here to view the Cutting Heads & Blades Selection Chart (PDF Format).
  • Bike Handle
    When used in conjunction with a harness, the bike handle allows the machine to be easily guided, enabling a smooth horizontal mowing action to cover large areas quickly and efficiently. With soft grips for increased comfort, the bike handle provides greater control and helps reduce operator fatigue.

    See it in action!
  • Shoulder Strap / Carrying System
    Using a shoulder strap or carrying system helps distribute the weight of the equipment for increased operator comfort and improved maneuverability.
  • Multi-Function Control Handle
    Having easy access to all of the controls on one comfortable handle makes it easy to complete tasks so the operator’s hand never has to leave the handle.
  • IntelliCarb™ Compensating Carburetor
    The IntelliCarb™ Compensating Carburetor measures the air pressure on the clean side of the air filter and adjusts the metering diaphragm in the carburetor. This keeps the RPM at a consistent level, even when the air filter begins to clog.
  • Tool-Free Handle Adjustment
    The central wing nut enables easy adjustment without the use of tools. For transportation and space-saving storage, the handle can be rotated 90°.
  • Anti-Vibration System
    STIHL has a system for minimizing the vibration levels of handheld outdoor power equipment. The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience.
  • Upright Translucent Fuel Tank
    Allows operator to easily check fuel level before starting work. Upright position makes it easier to refill.
  • Protected Spark Arrestor Muffler
    Has large baffles which reduce noise level and contains a screen designed to reduce the emission of sparks.
  • Protected Spark Plug
    Protected yet easy to change.
  • Simplified Starting Procedure
    To get started, simply pump the fuel primer, set the choke and pull the starter cord. The built-in stop switch allows the user to turn off the engine with a simple press of the button. When the engine is off, the throttle lock automatically returns to the “start” setting. Your power tool will be ready to be started when you’re ready to get back to work.

    See it in action!
  • Heavy-Duty Steel-On-Steel Clutch
    Centrifugal clutch is designed to reduce slippage.
  • Protected or Enclosed Control Cables
    Eliminate dangling and loose wires.
  • Air Filter Cover
    Easily removed for fast and easy filter cleaning or replacement.
  • Throttle Trigger Interlock
    Must be depressed before the trigger can be activated.
  • Protected Choke Lever/Knob
    Helps prevent damage.
  • High Tech Polymer Housing
    Housings are lightweight, withstand greater impact and are corrosion-resistant.
  • Fully Lined Drive Shaft
    Provides smooth operation and less vibration.


36.3 cc (2.2 cu. in.)
1.4 kW (1.9 bhp)
5.8 kg (12.8 lbs.)
710 cc (24.0 oz.)
*Without deflector and cutting attachment.

Important Information

WARNING! Improper use of any trimmer/brushcutter can cause serious or fatal injury. Read, understand and follow all safety instructions in your instruction manual. To reduce the risk of injury from blade contact, circular saw blades may be used on FS brushcutters that have a limitstop, a bicycle handle and double shoulder harness and not on FS brushcutters with a "J" handle or loop handle. Other rigid blades may be used on FS brushcutters having a bicycle handle, a "J" handle or a loop handle equipped with a barrier bar. To reduce the risk of eye injury always wear proper eye protection. Always use the appropriate deflector for the type of cutting attachment, as explained in your instruction manual.

Note: STIHL recommends use of fuel with no more than 10% Ethanol content. Using fuel with greater than 10% Ethanol content may cause damage to your equipment and may void your STIHL warranty. Learn More…

WARNING! Improper use of any power tool may cause serious or fatal injury. Read, understand and follow carefully the operating and safety instructions in your instruction manual before using such products.

STIHL products sold through U.S. STIHL Dealers are for distribution in the United States only.


FS 131 is rated 4.8 out of 5 by 59.
Rated 4 out of 5 by from Detest the new choke system I regret buying an FS 131. The gearbox on my FS 110 failed. It was the second one and the trimmer was 13 years old, so I decided to buy a new 110. However, after I got to the store I thought that maybe I should opt for a larger trimmer. With the wet weather of the past few years the grass and brush is much heavier, and I’m doing a lot more mowing with the trimmer, in areas that have remained too wet for a lawn mower. The new choke system was explained to me and it seemed simple enough. Big mistake on my part. I loathe and detest that system. The manual says to press the fuel pump bulb at least 5 times. Don’t I wish that 5 times were enough. I have now run through 28 tanks of gas, and have found that for semi-reliable starting I need to press the bulb 12 times. I timed the process, 50-60 seconds in 80 degree weather. How long will it take when the bulb is stiff in 40 degree weather? There have been a few times when I the bulb never filled with fuel (noticeable because the bulb is easier to press and rebounds quickly), even with 12 presses. Yet the engine started. Every time I go to start the engine I feel that I should emulate Dorothy, i.e. click the heels of my RedWing boots 3 times and say something like “Please start.” I have not had a successful warm start. Normally when I go out to trim I plan on working for a few hours, especially when I’m at a distance from the house. Twice I have gone through a tank of gas, shut down long enough to refill the tank, and then tried to re-start the engine. Because I had run the fuel tank dry I pressed the bulb 5 times after fuel appeared in the bulb. I hated to do the 12 I do for a cold start. The choke was set to the warm start position. If I did as the manual suggested, cranking until the engine runs, I would still be out in the field. I eventually gave up and returned to the house. The second time I tried this I left the choke knob in the open position but did the bulb presses. Again, the engine would not start. With the FS 110 this was not a problem. I would simply leave the choke open, lock the throttle, and pull the cord. At the moment the warm start is not a big problem because as warm and humid as it has been I really wasn’t eager to continue with a second tank. But that will change as the weather cools. It’s not like I don’t know anything about trimmers. I bought my first Stihl, an FS 90, in 1989. I replaced that with the FS 110 in 2006. So I have been using Stihl trimmers for many years. With all kinds of attachments—the string head, the polycut head, grass blade, brush blade, and power scythe. Until I got this 131 I never had reason to gripe. But I am really dissatisfied with the 131, at least with the starting process. What was so difficult about locking the throttle and setting the chock lever to start, and then opening the chock when the engine started. It was simple and reliable. Maybe I got a bum unit, but I am stuck with it now. I certainly would not recommend buying a trimmer with this starting system unless there was an agreement for a no questions asked return if necessary after the buyer had the opportunity to use it for several tanks of gas. All that being said, please note that I am not unhappy with the performance of the trimmer. My trimmer gets used a lot. And as noted above, with the wet weather it is getting used more often, and under much more difficult cutting conditions. Once the trimmer starts, something I am never sure of happening, it works and works hard. Other than the initial 3 tanks of fuel, the break-in period, the trimmer has usually been operated at full throttle on thick, heavy, generally wet grass and brush. I can’t say that I’ve seen an increase in efficiency of fuel use. The 110 would run through a tank of gas in about 1 hour. I’m getting anywhere from 1 hour to 1 hour and 20 minutes with the 131. The longer run times were in the beginning when I wasn’t running full throttle. I suspect that I haven’t seen much increase in run time because this trimmer is running at full throttle for longer periods of time. As for the anti-vibration system, is there one on the 131? The manual states that the anti-vibration elements should be checked before starting work, but there is nothing in the manual to indicate where these anti-vibration elements can be found. My hands would get tingly when running the 110, but that would usually happen with the 2nd or 3rd tank of gas. That is something that I have not been able to do with the 131.
Date published: 2019-07-15
Rated 5 out of 5 by from First impressions: very positive Potent little machine that has thus far exceeded my expectations. glad that I went with this model (as opposed to lessor or competitive models). Harness and handlebars are a plus.
Date published: 2019-07-10
Rated 5 out of 5 by from all you could ask for Plenty of power, starting is very easy and the one button off switch is nice. I use the 31-2 fix cut head with .105 line and works great.
Date published: 2019-07-09
Rated 5 out of 5 by from Great brush cutter I bought this to keep the woods back from the yard does a spectacular job I’ve had it for a year now ,a have only good to say about it
Date published: 2019-07-08
Rated 2 out of 5 by from To hard to start when hot. Not the power I expected for this machine and this money diapointed Does not my expectations I have bought it so it is mine but I still need another I keep 2 I will not concider a SthilI did give the dealer shop a chance they said this was all it was going to do
Date published: 2019-07-02
Rated 5 out of 5 by from My husband was absolutely thrilled with his surprise gift! My husband has been going crazy cutting down all the weeds, brush and small trees that he can in his spare time ever since he got his new gift. He loves it!
Date published: 2019-06-12
Rated 5 out of 5 by from This product has great features I am enjoying the power and comfort of the trimmer. The shoulder harness is great. It makes it a lot easier to use and balance.
Date published: 2019-06-04
Rated 2 out of 5 by from Bad egg? I love Stihl products they have been excellent dependable tools for me. Ever since early 20’s when logging I’ve owned Stihl they were dependable when you were deep in the woods or at the landing. I currently own a 800 mag blower, ms310 saw, 181 saw and have the ( fs131 that’s when I got disappointed ) I don’t know if I got the bad apple in the bushel or what- it started fine and from idle to 1/2 throttle it doesn’t miss a beat but from 1/2 throttle to full it starts sputtering and the rpm doesn’t get any higher I’ve taken it in twice and I’ve only used it 3x. I use it at home and at church that’s it. That would be like the gas pedal on my car once you have it half way down it doesn’t go any faster and starts missing. They changed the carburetor out now it’s hard to start and the rpm is not as high as the previous carburetor so I just figured they turned it down but it still kinda coughs. I would trade it in on the 240 if they let me. I can’t stand operating a piece of equipment your not happy with. E-mail me Stihl. “ please”.
Date published: 2019-05-04
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Optional Accessories

  • Gearbox Attachments
    Gearbox attachments are available for this model. View the interchangeable gearbox chart to find out which attachments work with this model.
  • Straps and Harnesses
    They distribute the load from your hands to your shoulders. They also help reduce operator fatigue and make it easier to use trimmers, brushcutters and clearing saws for extended periods.
  • Trimmer Line
    There's high-performance STIHL trimmer line for every operating condition. 
  • Trimmer Heads & Blades
    Many trimmer heads and blades are available. Find out which ones to use with this model in this chart.  

Standard Features

  • Common Features for Trimmers
    View the features common to many STIHL trimmers.

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For Your Safety


Read what our customers say about STIHL Trimmers
How to Wind a STIHL Trimmer Head - Video
Cutting Heads & Blades Selection Chart (PDF)
FS 131 Instruction Manual (PDF)
Download Instructions on How to Rewind Your Trimmer Head (PDF)
Product Safety Manual (PDF)
STIHL Limited Warranty
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