FSA 85

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This battery-powered straight-shaft trimmer delivers the cutting performance needed for professional landscaping tasks. 

Product Description

So powerful and light, it feels like cheating. The STIHL FSA 85 professional trimmer gives landscapers the ultimate tool for working in densely populated and noise-restricted areas. Powered by 36-volt Lithium-Ion battery technology, this trimmer is five times quieter than the STIHL gasoline-powered equivalent. And with no need for gasoline, the trimmer eliminates all fuel costs and has zero exhaust emissions – ideal for use in close quarters and municipalities looking to go green. Better yet, no power cords.

STIHL Lithium-Ion trimmers continue to run at full capacity, even as the battery drains. You can expect nothing less than 100% performance from the FSA 85 until the battery is completely depleted. The trimmer is also balanced and lightweight, delivering excellent cutting performance and low vibration for easy, smooth operation. Its variable speed trigger allows you to control cutting speed on the fly, so you can maneuver easily around delicate plantings. And when you need to spot trim, this trimmer instantly starts up with the pull of a trigger.

Run time may vary based on battery type, charge level and capacity, model, operating style and conditions. Batteries and chargers can be purchased separately or as a combined set with tool.

View Our Usage Chart

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

  • 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).
  • 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.

    See it in action!
  • Hanging Loop
    Hang your cordless trimmer securely on a wall to save space using the loop in the handle housing.

    See it in action!
  • STIHL Electric Motor
    Lightweight and compact, STIHL electric motors require minimal maintenance and feature low noise levels and reduced vibration.
  • Loop Handle
    A thumb screw allows the ergonomic loop handle to be easily adjusted to the desired position without tools.
  • Rubberized Soft Touch Handle 
    Soft rubber texture is both easy to grip and makes the product comfortable to hold for extended periods.  


35 cm (14")
WEIGHT* (w/ Recommended Battery)
w/ AP 300 4.5 kg (9.9 lbs.)
AP Series
RUN TIME (w/ AP 100)
Up to 15 Minutes
RUN TIME (w/ AP 300)
Up to 45 Minutes (Recommended combination)
RUN TIME (w/ AR 1000)
Up to 120 Minutes
RUN TIME (w/ AR 2000)
Up to 160 Minutes
RUN TIME (w/ AR 3000)
Up to 200 Minutes
*Weight without cutting attachment or guard. **Battery and charger sold separately.

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! 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.


FSA 85 is rated 3.6 out of 5 by 40.
Rated 4 out of 5 by from Love all my Stihl products but the line head is awful! I love all of my stihl battery products but the fsa85 line feed head is really poor. I dont mind flipping it over and pulling it out by hand if I have to but most of the time it wont even pull out like that. I have to take the head off and then pull it out and put in back on. As expensive as these products are, I feel stihl should somehow redesign the head unit on this and ship out a new and improved product to loyal customers at once. Other than that it is a great unit. I have this, the hedge trimmers and the blower that all use the same battery. They are great!
Date published: 2019-09-12
Rated 4 out of 5 by from Bad trimmer head The trimmer head is junk no auto feed!Have to manually push down on button and pull on the line. I purchased the pole trimmer first, that was expensive but worth the money. Than I purchased the trimmer so I could use the AP battery. Stihl needs to give all of these customers new redesigned heads!
Date published: 2019-08-31
Rated 5 out of 5 by from Good trimmer for senior citizens! Since I am "older" and not into heavy equipment operations, I really appreciate this trimmer. It is easy to operate and not bulky or too heavy.
Date published: 2019-08-27
Rated 1 out of 5 by from Totally disappointed with this purchase I spent so much money on this thinking this was the best brand name to buy. Wow was I wrong. First time ever I didn't do any homework before I purchased. How can they sell these with zero ability to feed the string. Zero, and the string lasts for crap. I bought the battery for easy use. Its the opposite, I would rather mix gas and pick a brand that actually feeds string, not having to pick it up every 2 mins and push it in with your fingers! Stay away.
Date published: 2019-08-26
Rated 5 out of 5 by from Almost Flawless I Traded in my trusty FS85 on this unit, and have no real complaints with it. It took a little getting used to having a heavy motor on the bottom, but once I got the loop handle adjusted to my liking it is a great tool to use. The only issue I have with it is the trimmer head. Re-spooling is not a problem, it is really easy to do, however it doesn't hold a lot of line
Date published: 2019-08-15
Rated 1 out of 5 by from DO NOT BUY OMG...I've spent hours on this stupid piece of machinery....The line feeder is so bad .Why you ask.1- impossible to coil up the line, you have to hold down the release button and spin another portion of the feeder. Which takes the strength of superman and the dexterity of spider-man. (that's assuming you inserted the line correctly and it holds which frankly you cannot verify or feel certain that the line has been correctly placed)2- It jams all the time and i mean every single time i've used it.3 - The feeder itself is a difficult to remove and service (you have hold the release down and spin the release in some weird origami way.)4- I use the Stihl line and it is not very durable and needs to be constantly fed out which leads you back to point 2. Plus it only hold about 6 feet of line per side.5- This is so poorly engineered it's ridiculous....by a ego trimmer instead
Date published: 2019-07-19
Rated 5 out of 5 by from Convenience Trimmer is excellent in convenience and ease of use. Great for immediate action on trimming and cleanup projects, without the complications of cords or handling fuel. The lightweight promotes use by other family members. A-300 battery has more than adequate capacity, with quick recharge.
Date published: 2019-07-05
Rated 1 out of 5 by from Highly do not recommend this product very underpowered I am a very big fan of Stihl and their products. However this product is a rip off. It is severely underpowered. Also the line fed does not work very well. When I took it back to the dealer he agreed that it is a very underpowered trimmer.
Date published: 2019-06-11
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For Your Safety


FSA 65/FSA 85 STIHL Lithium-Ion Trimmer - Video
How to Wind a STIHL Trimmer Head - Video
Cutting Heads & Blades Selection Chart (PDF)
Download Instructions on How to Rewind Your Trimmer Head (PDF)
Product Instruction Manual (PDF)
Product Safety Manual (PDF)
STIHL Limited Warranty
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