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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.

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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.
  • 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.
  • Start/Run/Stop Controls on Handle
  • 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.)
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 4.4 out of 5 by 45.
Rated 2 out of 5 by from Loss of power I have trusted stihl products and loved them,except this trimmer!!!! Had the same problem of loss of power ,its been in shop four times and they all say varb was gunked up.Then they go on to say it runs great!! Well why after a hour of being out of shop it will not stay at full throttle??? The products are expensive enough i cant afford to have worked on every year!
Date published: 2017-09-20
Rated 4 out of 5 by from Strong and ready for use A little pricey for most consumers, but overall it has the power to tackle most of what I needed it for. Engine gets a little warm up around the top end (Wish they worked a heat deflector into design) when using as I am a tall person. The push to extend line button did not last long before I had to replace it, fuel filter popped out, and gas cap retention line was poorly designed. The motor is strong and reliable: as well as; quick to start and power through "Most" of my yard with ease.
Date published: 2017-09-20
Rated 4 out of 5 by from Should have bought the higher hp model Overall good performing but did bog down a little in heavy grass/brush. I am going to invest in the blades to see if that improves performance. I almost bought the higher hp model just to be sure but did not want to go way over budget.
Date published: 2017-09-19
Rated 5 out of 5 by from This product is as advertised. This product has a lot of power, but more important is that it starts every time. I have no idea why I waited so long to buy this trimmer.
Date published: 2017-09-08
Rated 2 out of 5 by from Won't stay at high throttle I love stihl so don't think I'm writing this to down on stihl. It's just I have recently bought the brand new fs91r and since day one the weed eater would not stay at high throttle when string extended. And I took it in for repair 3 times before someone found the filter was dark brown. Said it was from ethonal in gas and that I got the bottom of the tank. He said to only use 93 or ethonal free gas. Well seeing as ethonal is not at every gas station I have done 93 and now it's doing it again where it don't want to run when string is out. But the past three weeks after it has ran awesome. But now having same issue as before. Still not as good as my old fs90r I had though.
Date published: 2017-09-07
Rated 5 out of 5 by from Product has great power. Trigger to small i like new choke system the weight of product makes it easy to use. Stihl has made sure our dealer is well trained on products.
Date published: 2017-08-26
Rated 4 out of 5 by from Very good product. This trimmer is the best you purchase for your money. It is professional grade, so if you buy it for your personal yard use it is the last one you will ever have to buy. It zips right on through tall grass and weeds with ease. I bought it because I got tired of the home depot grade and i wanted something that will last for long time and I have no doubt that it will. It starts up with no problems and once it warms up its ready to get the job done. I am very pleased with this investment and the price wasn't to high. I recommend this particular weed trimmer if you need something for your home use and you want it to last,
Date published: 2017-08-23
Rated 4 out of 5 by from Ready for a good day's work. After wearing out an older string trimmer with handlebars, which I liked, my Stihl dealer sold me on a 91-R, which I have used in getting ready for this summer's fire season. The extra volume in the fuel tank has made my work in trail clearing and a clear zone around the house a lot more efficient. I can get through a whole day with just a couple of pauses to re-fuel.It took me a little-head-scratching to figure out a tiny little change in the way the head opened up to replace the trimmer line, and I needed to whack the ground a little harder to make the bump-feed work, but in the end, it was only a bit different from the one I was used to.Overall, a good piece of equipment.
Date published: 2017-08-22
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Standard Features

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

You Will Also Need

For Your Safety

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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