FSA 90 R - $299.99 DSRP

Distributor Suggested Retail Price
FSA 90 R w/o battery & charger

DSRP: $299.99


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Professional straight-shaft trimmer powered by a 36-volt Lithium-Ion battery for excellent cutting performance. Batteries & chargers can be purchased separately or as a combined set with tool.

Get the benefits of Lithium-ion technology plus the power of STIHL with the FSA 90 R trimmer. This straight-shaft, battery-powered trimmer is great for landscaping in noise-sensitive or highly populated areas. Conveniently lightweight, the FSA 90 R is both portable and easy to operate. The trimmer’s high cutting speed plus its 15” cutting width will help you trim more in less time. It starts insta...Read More
Print Spec Sheets
FSA 90 R Specifications
WEIGHT w/o Battery 2.8 kg (6.2 lbs.)
w/ AP 300 4.5 kg (9.9 lbs.)
RUN TIME (w/ AP 300) Up to 30 minutes
RUN TIME (w/ AR 900) Up to 120 minutes*
CUTTING WIDTH 35 cm (15")
*Battery and charger sold separately. **Run times using ECOSPEED are substantially longer.
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.

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    STIHL Electric Motor
    Lightweight and compact, STIHL electric motors require minimal maintenance and feature low noise levels and reduced vibration.
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    Hanging Loop
    Hang your cordless trimmer securely on a wall to save space using the loop in the handle housing.

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    Retaining Latch
    All STIHL Battery powered products feature a retaining latch that is designed to prevent the unit from unintentional starts when the battery is inserted.

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    Loop Handle
    A thumb screw allows the ergonomic loop handle to be easily adjusted to the desired position without tools.

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.
WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
ADVERTENCIA: Cáncer y Daño Reproductivo - www.p65warnings.ca.gov
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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  • Quiet Line™ Zoom
    Quiet Line™
    STIHL uses a custom blend of polymers to produce a trimmer line with the best all-around characteristics of abrasion resistance, flexibility over time and temperature ranges, and welding resistance. Quiet Line™ is available in .080” and .095” diameters and comes color-coded so that the diameter can be easily determined.


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FSA 90 R is rated 4.3 out of 5 by 15.
Rated 5 out of 5 by from Light-weight solution My husband has a huge gas-powered trimmer. This one is mine! While he does the brush, I do the rest. It takes me about an hour to do all the trimming for our 300 x 200 foot lot. Because it is so light-weight, I enjoy walking around the yard and garden using it. We bought the best battery available, and it holds a charge for several hours of use. My only issue is restringing the line when it breaks. As with every other weed trimmer, keeping the string in place while reloading can be a challenge.. I use it as an excuse to take a break.
Date published: 2018-07-06
Rated 5 out of 5 by from Quiet, Powerful with long lasting battery This 2 string trimmer is powerful and has a battery that lasts about 1/2 hour of work.
Date published: 2018-07-03
Rated 3 out of 5 by from Battery is a bear to remove for charging. A heavy tool. CONS : a. Battery b. Weight & Balance c. String and head3 stars because the battery is next to impossible to remove with bare hands. So I had to use a force multiplier device aka, tool = water pump pliers = Channeloc Brand. These opened wide enough (3") to grasp the back of the battery to yank the battery out of the poorly designed release clamps. Stihl dropped the ball in the battery release design. I put silicone grease on the tangs without success. This is the biggest complaint I've read from other reviews. A simple bail type handle on the battery or less spring tension or, or... Stihl needs to step up to the plate and fix this ongoing problem. I also have Stihl hedge shears with the same dumb design :-(.Their exist a weight/balance problem too - these tools are heavy! The included shoulder strap is a help. The solution is to buy a Stihl battery belt with shoulder harness. A user wears the battery (and weight) around ones waste. The optional shoulder harness distributes the weight. The belt can hold up to 2 batteries but I just use 1 and change it every 30 minutes or so. Stihl also sells a battery back pack. The battery back pack cost is high, approaching close to $X,XXX.XX yikes!The string is a pain... all strings are a pain. There exist options, just explore what is available.PROS: a. Stihl Brand = quality. b. Quiet. c. Long lasting battery. d. Ease of use - no 2 cycle gas/oil. e. Clean, wipes up with a damp cloth. f. Always starts. g. Does a beautiful job of trimming. h. As powerful as a gas trimmer.Final opinion; I will recommend with reservations. Stihl needs to address the cons.
Date published: 2018-06-19
Rated 5 out of 5 by from battery lasted longer then I thought great item, hard to rewind line on it. It has the power of a gas unit and much more
Date published: 2018-05-27
Rated 5 out of 5 by from Good for what it is If you have a small yard, this item is perfect. but when big jobs come up, like the monkey grass, you have to charge it multiple times.
Date published: 2018-05-04
Rated 5 out of 5 by from Love having a battery trimmer! Absolutely love my battery trimmer. No more yanking and yanking and yanking my stihl gas trimmer. Push a button and away I go. Absolutely in love with it!!!!
Date published: 2018-03-26
Rated 5 out of 5 by from The future is here in this trimmer This trimmer is more powerful than gas and has none of the drawbacks - no smell or fumes, no mixing of fuel, no stale fuel, instant start, runs for hours on one battery and when it runs down, simply put in another - about 5 seconds. Line feed is precise.
Date published: 2018-02-12
Rated 4 out of 5 by from Quite powerful Putting the motor right on the head really makes a difference in terms of how much power is transferred. Compared to an equivalent GreenWorks trimmer, this feels much more like gas and, with the right line, will absolutely decimate most common overgrowths, including younger blackberries. You can definitely bog the motor down if you shove it into a super dense patch of greenery, though.Battery runtime doesn't sound very impressive on paper, but in use, it's more than good enough for a single home. Professional landscapers who use theirs all day every day will probably need to stick to gas or spend a fortune on batteries.I don't find it off-balance personally, but it isn't really lightweight, either. Even if you use the strap, expect some forearm fatigue until you get used to it.I swapped the head out on mine for the DuroCut because I absolutely hate winding spools, and while I'm happy with that decision, the changeout process was pretty difficult. There's no arbor lock on the tool, so they give you a smooth steel pin that you're supposed to insert through the top of the head until it monkey wrenches. It sounds simple enough, but it is physically impossible to insert said pin with your bare hands--I had to pound it in with a hammer, and then getting it back out was even more difficult as not even locking pliers wanted to grip that smooth steel. There's absolutely no reason to machine that thing that tight, plus I guarantee I'll lose that special pin. Next time I'll use a nail.I'd still give it a 5 if all the controls weren't brittle polycarbonate and if it would accept a brush cutter; some of my blackberries aren't that young.
Date published: 2017-12-11
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