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FS 91 R

FS 91 R
A professional trimmer packed with features for simplified and convenient trimming.

Product Description

Fulfilling the demanding landscaper’s trimming needs, the STIHL FS 91 R trimmer is the well-rounded choice for professionals. It features a low-emission engine and large fuel tank which provides 30% longer run times than the previous model. With its rubberized loop handle, this straight-shaft trimmer delivers a comfortable grip of product, the maneuverability needed to navigate obstacles and the power to cut them down. The FS 91 R trimmer also has a simplified three-step start procedure that saves users time, and a superior air filter benefitting you in the long run.

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

  • 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.
  • Protected Spark Arrestor Muffler
    Has large baffles which reduce noise level and contains a screen designed to reduce the emission of sparks.
  • 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.
  • Adjustable Front Handle
    Adjusts for comfort.

Specifications

DISPLACEMENT
28.4 cc (1.73 cu. in.)
ENGINE POWER
0.95 kW (1.27 bhp)
WEIGHT*
5.5 kg (12.1 lbs.)*
FUEL CAPACITY
710 cc (24.0 oz.)
CUTTING SWATH
16.5"
POWER SOURCE
Gas
*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 engine products with the Caring for Nature logo are cleaner than EPA Standards for exhaust emissions.

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.

Reviews

FS 91 R is rated 4.3 out of 5 by 176.
Rated 5 out of 5 by from Great trimmer Just purchased this FS 91 R trimmer and used it for the first time today. Works great, runs very smooth! it is well balanced with the shoulder strap that comes with it. When looking for another trimmer I was advised by family members to get a Stihl and glad I did! The neighbors on either side of me have Sthil trimmers and leaf blowers, so now I am the third member of the Sthil club! Highly recommend this product!
Date published: 2019-07-15
Rated 5 out of 5 by from Works well, cuts through the tough stuff I'm very happy with my trimmer, it even works its way through the viney weeds like a champ.
Date published: 2019-07-15
Rated 5 out of 5 by from Awesome trimmer! Just picked up the 91 R a few weeks ago. Used it for about 3 hours a day for about 4 days, and I have to say thoroughly impressed. Very strong for very thick heavy brush and thick weeds. But can also do good for thin weeds around houses or landscaping. Very smooth and easy running, quiet and awesome sounding (quiet) I was a little skeptical on how I would like the 4 mix engine, but after using it I’m amazed by it!! I was stuck between this and the 111 r, but with the 91 you could use a brush cutter, and also a solid steel shaft. It Cut down 6 foot hay weeds down with ease and will not bog down at all. Only problem is it’s a little short for me but for some others it might not be. Stihl is the only way to go!!!
Date published: 2019-07-13
Rated 4 out of 5 by from Great trimmer but it’s heavy so be ready! Cannot stop this machine it’s a great trimmer but it is heavy! Will run 3 or 4 hours according to how you run it on a tank of fuel! Highly recommend this product but if your looking to do steep banks or cutting for extended times it’s alittle on the heavy side.
Date published: 2019-07-11
Rated 5 out of 5 by from This trimmer is great I've owned different models of stihl trimmers in the past. I added this one to my collection. works great. has the power I am looking for and need
Date published: 2019-07-11
Rated 3 out of 5 by from Loses power Can't maintain a good fast speed starts to lose power even if the string is not that long but it gets the job done
Date published: 2019-07-08
Rated 5 out of 5 by from 2 acres i,ve been hitting my 3/4 acre and had no problem. My cousin has 3 acres across the street. I knocked out 2/3 of the 4 feet tall weeds with the power of the fs 91 r. Love it and recommend it to any home owner that wants to get the job done fast and complete.
Date published: 2019-07-05
Rated 5 out of 5 by from High quality product that performs well. This trimmer works exceptionally well. Easy to start and comfortable to use. It cuts very well. The one complaint that I have is the string that came loaded on it. It has a "memory" from being tightly wound and after a while would not feed automatically. If it was taken apart and rethreaded, the string was so coiled up it was almost unusable. I finally replaced it with other string. See pictures.
Date published: 2019-07-01
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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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Support

Read what our customers say about STIHL Trimmers
STIHL Trimmers & Edgers, the Right Tools for the Job - Video
How to Wind a STIHL Trimmer Head - Video
Cutting Heads & Blades Selection Chart (PDF)
FS 91 R Instruction Manual (PDF)
Download Instructions on How to Rewind Your Trimmer Head (PDF)
Product Safety Manual (PDF)
STIHL Limited Warranty
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