FC 91

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A professional, curved-shaft edger with high blade speed, a low-emission engine, and more.

Product Description

Add a professionally landscaped look to sidewalks, walkways and driveways with the STIHL FC 91 edger. With its large 710 cc fuel tank and low-emission engine, this professional edger delivers 30% longer run times than the FC 90. It features a vertical pleated air filter for better filtration and STIHL-exclusive IntelliCarb™ technology for maximum RPMs when air filter begins to clog. It also features one touch stop and a simplified starting procedure enabled by the semi-automatic choke lever. It’s a must-have for high-volume landscaping professionals.

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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  • Stop Switch
    With the Stop Switch, the equipment’s ignition is always ready for starting. Products with this feature shut off easily by pressing and holding down the switch. When the switch is released, it returns to the start position automatically, reducing the number of steps needed to start the product.
  • Adjustable Depth Wheel
    The feature allows the user to easily adjust the wheel to the desired cutting depth for creating precision cuts.
  • Skid Plate
    All STIHL edgers come equipped with a skid plate to protect the gearbox during use.
  • "Open" Guard Design
    The professional “open” guard design helps minimize clogging, allowing for more efficient cutting.


28.4 cc (1.73 cu. in.)
0.95 kW (1.27 bhp)
710 cc (24.0 oz.)
20.3 cm (8.0 in.)
25.4 mm (1.0 in.)
1:1.235 8,100 rpm
6.0 kg (13.2 lbs.)
*Dry weight.

Important Information

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.


FC 91 is rated 4.5 out of 5 by 15.
Rated 5 out of 5 by from FC91 Edger Right Tool for Large Residential Jobs I considered other brands and also lesser powered Stihl Models, but bought the FC91 with no regrets.I have lots of edging to do on my property, probably 800 feet and the yard is bermuda so it grows over the sidewalks fast and tough. The FC91 powers through without bogging down. It makes quick work of the edging job.The only thing I would suggest.... the FC91 is fairly heavy. Get the harness.
Date published: 2019-08-29
Rated 5 out of 5 by from The Best Can't beat the power and ease of use, best edger on the market!!
Date published: 2019-07-23
Rated 5 out of 5 by from Gets the job done Excellent trimmer that does it all. Upgrading next season & can’t wait to see what the extra power from other units can do
Date published: 2019-06-10
Rated 2 out of 5 by from Runs very rough on first use. Need to find time to take it in. Right off the bat it runs very rough. Hard to keep it running. It is like the choke is stuck on. When it finally winds up it works good, but then the issues start when you let off.The chainsaw I bought with it is amazing, but I think this is a bad apple.I assume they will adjust it for free being it is brand new.
Date published: 2019-06-03
Rated 5 out of 5 by from Great product This is my first STIL product and it works great, easy starting and adjustments are easy.
Date published: 2019-02-11
Rated 1 out of 5 by from FC91 trimmer fell apart in under 90 days A true piece of crap— overpriced, and fell apart in less than 90 days. Don’t waste your money with Stihl.
Date published: 2018-12-02
Rated 4 out of 5 by from FC91 It’s on the expensive side for the average home owner but quality is worth the money. And again my application is not your typical home, 10 acres of heavy rocks and weeds so I needed more than just cutting tall grass. I ran through a full spool of the line that came with the product in a single 4hr cutting session. Replaced it with their carbon fiber line and cut for three more days without replacing the line yet (about 12 full hours). My only regret is not getting the handlebars. I did notice tight muscles in my lower back after this extended cutting this fall season. The handlebars might have reduced some of that stress.
Date published: 2018-09-20
Rated 5 out of 5 by from Retiree This product starts easy and runs smoothly through numerous uses so far. After cutting through some heavy sidewalk grass overhang, this edger has zipped through each and every successive use. It gives a professional finish to my lawn.
Date published: 2018-08-28
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Standard Features

  • Common Features for Edgers
    View the features common to many STIHL edgers.

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For Your Safety


FC 91 Instruction Manual (PDF)
STIHL Trimmers & Edgers, the Right Tools for the Job - Video
STIHL Limited Warranty
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