FS 91 R - $329.95 DSRP


Distributor Suggested Retail Price FS 91 R DSRP:  $329.95

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

Demanding landscapers can save time using the STIHL FS 91 R professional trimmer. With its larger fuel tank than the FS 90 R, this model provides 30% longer run times, as well as a three-step start procedure to get to work faster. Thanks to its superior air filtration and low-emission engine, the FS 91 R is a dependable tool with great maneuverability and power. Its rubberized loop handle is desig...Read More
Print Spec Sheets
FS 91 R 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.)
POWER SOURCE Gas
*Without deflector and cutting attachment.
Model Features
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    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

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

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    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.
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    Adjustable Front Handle
    Adjusts for comfort.
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    Fully Lined Drive Shaft
    Provides smooth operation and less vibration.
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    High Tech Polymer Housing
    Housings are lightweight, withstand greater impact and are corrosion-resistant.
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    Protected Choke Lever/Knob
    Helps prevent damage.
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    Start/Run/Stop Controls on Handle
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    Throttle Trigger Interlock
    Must be depressed before the trigger can be activated.
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    Air Filter Cover
    Easily removed for fast and easy filter cleaning or replacement.
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    Protected or Enclosed Control Cables
    Eliminate dangling and loose wires.
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    Heavy-Duty Steel-On-Steel Clutch
    Centrifugal clutch is designed to reduce slippage.
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    Protected Spark Arrestor Muffler
    Has large baffles which reduce noise level and contains a screen designed to reduce the emission of sparks.
Standard Features
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    Common Features for Trimmers
    View the features common to many STIHL trimmers.

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.
Click to view the STIHL Limited Warranty Time Periods
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    STIHL recommends a mix of 50:1 high-quality 89 octane or higher unleaded gasoline to STIHL engine oil. This same mix ratio should be used during break-in.

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    The latest advance in gasoline can technology is here with No-Spill® fuel containers. Featuring a special treated body for low permeation, thumb-button flow controls for easier pouring, and a wide and stable base design to reduce upsets, No-Spill® fuel containers help ensure that the gasoline goes into your tank, not on the ground or into the air. Fill even smaller-sized tanks without spilling – flow stops automatically when the tank becomes full. With 1¼-gallon, 2 ½-gallon and 5-gallon sizes available, you’re sure to find one that fits your needs. Ask your local STIHL Dealer about No-Spill® fuel containers. Don’t settle for anything less.

    Meets California Air Resources Board Phase II requirements for sale or use in California. No-Spill® gasoline cans are tested and certified to ASTM F-852-99 standard specification for portable gasoline containers for consumer use and our diesel and kerosene cans are tested and certified to ASTM F-976-02 standard specification for portable kerosene and diesel containers for consumer use.

For Your Safety
  • STIHL® Pro Mark™  Hearing Protector Zoom
    STIHL® Pro Mark™ Hearing Protector
    Padded stainless steel spring wire headband maintains constant pressure. Easy to adjust. Noise Reduction Rating (NRR): 29. Meets ANSI S3.19-1974 standard.

    Colors available: Camouflage, Orange and Grey
  • Patterned Frame Glasses Zoom
    Patterned Frame Glasses
    Experience professional-grade protection from the harsh sun with the Patterned Frame Glasses from STIHL. Offering 99% UV protection, the glasses meet ANSI standard Z87.1+ and feature comfort-cushioned nose pads and polycarbonate impact-resistant lenses. They’re also lightweight and slip-resistant. Stop by our showroom to check out the Patterned Frame Glasses, as well as all of our protective eyewear!
  • High Performance PRO Gloves Zoom
    High Performance PRO Gloves
    Elastic slip-on cuffs. Padded palm and knuckle guards. Reinforced PVC grip overlays. Sizes: M, L, XL

STIHL Dealer Days are Ending Soon!

FS 91 R is rated 4.6 out of 5 by 20.
Rated 5 out of 5 by from Power to cut through the toughest weeds The unit is easy to start and has the power to cut through the toughest weeds.
Date published: 2017-05-15
Rated 5 out of 5 by from POWERFUL!!! I bought the FS 56 RC-E last week and it wasn't enough for my yard so I came in on day 7 to Farmers Service In Isle Of White Co, VA, GREAT people there, and traded up to the FS 91 R and I'm glad I did! This thing is much more protected being the professional series, and much more powerful! I added the duracut head and it takes everything down without bogging down! The negative reviews are from those that don't know how to respool a line head and start a trimmer that's not from a box store. These things are bulletproof! Buy the 6 pack of oil or the motomix and it will double the warranty from 2yrs to 4yrs! A MUST BUY YOU WONT BE DISAPPOINTED!!!!
Date published: 2017-05-12
Rated 5 out of 5 by from FS 90R After a year of ownership, This trimmer performs perfectly every time. I use it to clear tough brush and small trees on our little farm and I definitely use it outside its design specifications. I've seen a few low rated reviews, and I'm wondering what they did wrong. If there is an issue with this trimmer, It's because you didn't read the manual FIRST! The original string included with it was garbage in the stuff I cut, But a roll of heavier stuff from STIHL took care of it. Battling 3 acres of Wysteria with this thing and it never choked under load. The end of a 1 year ownership leaves me with only one question... What do I get next? I'm thinking about a chainsaw.... Gotta get those sweetgum trees down somehow.
Date published: 2017-05-10
Rated 5 out of 5 by from Excellent trimmer This is a great trimmer! I highly recommend it! Those who have issues with it probably shouldn't be using ANY trimmer.
Date published: 2017-05-07
Rated 1 out of 5 by from Should have bought another E??O trimmer!!! I bought my first Stihl trimmer and wished I hadn't!!. I even bought the more expensive "professional" series unit. I recently retired my other brand trimmer after 6 years of uninterrupted service. I have a 1.5 ace lot with 60+ trees. I went to my neighborhood ACE hardware and they only carried Stihl. Within 30 minutes of my 2 hour use of this new trimmer I had to take apart the auto bump feed trimmer head to rewrap the line about 10 times. After 2 hours of pure disappointment ???, standing in the middle of my property, I called ACE hardware and told them I was not happy and wanted to return it, and they said they would NOT take the unit back!! I never had any issues with the line feed mechanism on my ECHO, but if you use this Stihl product you will be better served getting on your knees and cutting the grass from around the trees with a pair of scissors... WHAT A WASTE OF MONEY.
Date published: 2017-05-07
Rated 5 out of 5 by from Great power & fuel economy This trimmer will cut 12"+ grass /weeds with ease. Fuel economy is great. Fairly light heavy duty trimmer. If you are not strong enough a shoulder strap is included. Saves time on big overgrown jobs. Very versitile cutting head options. This should be just as good or better than the FS 90 it replaced. I expect to get many good years out of the ol girl. If u are looking for a pro trimmer look no further!!!! Thanks Stihl!!!
Date published: 2017-05-06
Rated 5 out of 5 by from Value forward product Stihl machines could be considered pricey upfront but these product will carry their value. They continue to run as the day they were first primed.
Date published: 2017-05-05
Rated 5 out of 5 by from A real hard working tool My wife and I have used this trimmer to keep our place in the hill country of Texas. I do most of the heavy trimming along the river, trails and roads. I have had no problems starting or maintaining this trimmer and I work hard days at a time over the last year. So far it has preformed great. My wife uses it as well around the yard. A couple of pulls and she is up and running. We are very satisfied with our purchase.
Date published: 2017-05-01
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