FS 90 R


Distributor Suggested Retail Price DSRP:   $329.95

This low exhaust emission professional trimmer features a straight shaft and versatile cutting head options.

Featuring our proven low-emission engine and a loop handle, the FS 90 R STIHL trimmer is ideal for landscape professionals. Its solid, straight driveshaft works with a variety of cutting attachments—giving you more flexibility in trimming applications.

Print Spec Sheets
FS 90 R Specifications
DISPLACEMENT 28.4 cc (1.73 cu. in.)
ENGINE POWER 0.95 kW (1.27 bhp)
WEIGHT* 5.3 kg (11.7 lbs.)
FUEL CAPACITY 530 cc (18 oz.)
CUTTING SWATH 16.5"
POWER SOURCE Gas
*Weight without cutting attachment or deflector.
Model Features
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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 Plug
    Protected yet easy to change.
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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.
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    Upright Translucent Fuel Tank
    Allows operator to easily check fuel level before starting work. Upright position makes it easier to refill.
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    Purge Pump Primer
    By pressing the bulb, this small fuel pump delivers fuel to the carburetor, reducing the number of starting pulls needed after an extended break between uses.
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    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.
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    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).
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    Built in the USA
    Indicates products that are built in the United States from domestic and foreign parts and components.

    More Information

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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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    Loop Handle (R)
    Loop handle grass trimmers and brushcutters are ideal for trimming between bushes and shrubs and other areas where space is limited.
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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    •2.6 oz. bottle makes 1 gallon mix

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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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    No-Spill® Fuel Containers
    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
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    Exclusive deerhide leather provides fantastic wear properties and excellent sense of touch and feel. Naturally soft leather provides all-day working comfort. Sizes available S, M, L, XL.
  • Basic Hearing Protector - NRR 23 Zoom
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    Padded stainless steel spring wire headband maintains constant pressure. Easy to adjust. Noise Reduction Rating (NRR): 23. Meets ANSI S3.19-1974 standard.

    Available color: Grey

Are you ready for a STIHL?

Rated 4.6 out of 5 by 269reviewers.
Rated 1 out of 5 by GARBAGE - More trouble than useful I purchased an FS90R weed wacker thinking that Stihl would be a better product than say a Home Depot basic weed wacker. I WAS SERIOUSLY WRONG!!! This has been the worst piece of equipment I have ever used especially for a hefty price. - My ancient weed wacker made by a competitor from Home Depot ran circles around Stihl's piece of garbage. And I do mean garbage! I thought the reason the line was breaking was because it's what was included with the unit and possibly old. Purchased new line no difference! Takes forever to wind the spool to begin with then you can use the unit for about 30 seconds, the line breaks and you start all over. I spend more time winding the spool than cutting weeds. Yes I tap to feed but I shouldn't have to tap like I'm tap dancing to get it to work! Using the equipment shouldn't take longer or be harder than the yard work itself! No wonder gardeners charge so much, they have to make up for the time they are fixing their Stihl weed wackers! FYI I was asked to rewrite this review by Stihl because I named the competitor - guess Stihl is afraid of it's competition. September 18, 2016
Rated 5 out of 5 by Very heavy duty, but light wieght to carry This product works as designed and very easy to use. Grass blade attachment helps for thicker and heavy weeds. Very happy with the service form this weed eater. I did allot of research on the product and this was the best fit for my needs. Worth paying the extra money for this Stihl. September 14, 2016
Rated 5 out of 5 by A lot of bang for the buck After using a competitors product for 15 years, I chose to try the FS90R Trimmer since I have been having success with other Stihl products. This one is not different. Power right out of the box. I did have to make a slight idle adjustment at time of purchase to keep it running (we went through four (4) new units), but once that 1/4 turn adjustment was made - it has not missed a beat. It is slightly heavier than what I was used to...but I will gladly trade off for the power to perform.Been using it on a farm with lots of trimming to do. It has performed flawlessly.I would highly recommend it to anyone with a quantity of trimming to get done. September 7, 2016
Rated 1 out of 5 by Stihl lemon I owned this trimmer for 4 years and have maybe 15 hours on the machine and the trimmer blew apart internally. I only used fresh gas and only used Stihl oil at the correct mixture. I took it in to an authorized dealer and when they took it apart the timing gear (plastic) blew apart which then destroyed the engine. Stihl quality is severely lacking. Expensive boat anchor...... September 6, 2016
Rated 5 out of 5 by Very happy with product. Good power. Easy to start. Very pleased with trimmer. Ample power. Easy to use. A bit heavy, but not bad. Would recommend to anyone. September 6, 2016
Rated 5 out of 5 by Great product Bought the FS 90 a few weeks ago and it is awesome September 6, 2016
Rated 5 out of 5 by excellent machine worth each and every penny, powerful, does everything it supposed to do i strongly recommend getting a stihl to everyone i know September 5, 2016
Rated 5 out of 5 by best weed eater I ever had After lots of reviews read shopping and talking to people who do lawn care, I finally purchased a Stihl FS-90R. I only use the MotoMix fuel and keep it empty and run dry when storing for extended periods of time. It always is ready for go and always runs great. While it feels a bit heavier than other ones I've had before, it's better balanced and I'm able to carry it Longer and farther. Should have bought one long ago. September 5, 2016
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