KM 91 R - $309.95 DSRP

Distributor Suggested Retail Price
KM 91 R

DSRP: $309.95


Reserve with STIHL Express for In-Store Pick Up

This professional-grade KombiMotor features a powerful, low-emission engine that delivers 30% longer run times than the previous model.

The KM 91 R KombiMotor gives professional landscapers like you the option to streamline your entire operation. Instead of a pile of tools on the trailer, why not have one dependable engine with a selection of space-saving attachments? That’s exactly what the KM 91 R KombiMotor delivers. It also offers simplified starting with its semi-automatic choke lever, as well as one-touch stop and 30% longer...Read More
Print Spec Sheets
KM 91 R Specifications
DISPLACEMENT 28.4 cc (1.73
ENGINE POWER 0.95 kW (1.27 bhp)
WEIGHT 4.4 kg (9.7 lbs.)
FUEL CAPACITY 710 cc (24.0 oz.)
Model Features
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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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    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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    14 optional attachments available 
    Create a custom yard care system with up to 14 optional attachments – trim, edge, cultivate, prune, clean up and more!
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    Loop Handle
    The loop handle (R) is an adjustable rounded handle mounted on the shaft for support and control. The handle is designed to help control the machine in different positions, ideal for reaching tough spots. The handle is large enough to accommodate a gloved hand comfortably.
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    Quick-Release Coupling
    The quick-release coupling system makes it easy to switch between Kombi attachments. In addition, this feature allows KombiSystem equipment to be dismantled into two parts for easy transport and storage and then re-assembled quickly without tools.

    See it in action!
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    Split Shaft
    A split shaft and special toolless quick-release coupling lets you easily switch between attachments, making the KombiSystem highly versatile as well as easy to transport and store.
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    Anti-Vibration System
    STIHL has a system for minimizing the vibration levels of handheld outdoor power equipment. The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience.
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    Electronic Ignition Module
    The electronic ignition provides reliable starting and because it is fully enclosed, it is protected from moisture and debris for longer service life.
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    Purge Pump Primer
    A small fuel pump delivers fuel to the carburetor when pushed, reducing the number of starting strokes required following extended breaks in operation.
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    Multi-Function Control Handle
    Having easy access to all of the controls on one comfortable handle help makes it easier to complete tasks so the operator’s hand never has to leave the handle.

Important Information
WARNING: Cancer and Reproductive Harm -
ADVERTENCIA: Cáncer y Daño Reproductivo -
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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For Your Safety
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    Black Work Glasses

    The STIHL Black Work Glasses feature scratch-resistant polycarbonate lenses and flexible, ventilated, straight-back temples. They block out 99.9% of the sun’s harmful UV rays and offer a sleek style that looks great in any work environment. They’re also comfortable and feature rubber-tipped temples to help keep them in place while the head is in motion. Check out these and other stylish protective eyewear at our Dealership. Shown with Black Frame / Grey Lens. Available lens colors: Blue Mirror, Grey, Silver Mirror.

  • STIHL Landscaper Series™ Gloves Zoom
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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.
  • STIHL® Pro Mark™  Hearing Protector Zoom
    STIHL® Pro Mark™ Hearing Protector
    Padded stainless steel spring wire headband maintains constant pressure. Easy to adjust. Noise Reduction Rating (NRR): 29. Meets ANSI S3.19-1974 standard.

    Colors available: Camouflage, Orange and Grey

Are You Ready for a STIHL?

KM 91 R is rated 4.7 out of 5 by 22.
Rated 5 out of 5 by from I like my first one, I bought a second. My first KM series is the previous model and STIHL going strong. Bought the second one so I don't have to transport it back and forth to another property. Power and reliability have been good. If I could change one thing it would be the fuel tank vent. When you open it, it lets out a slight mist of fuel, even when the tank is almost empty. Hate the smell of gas on my hands.
Date published: 2018-07-10
Rated 4 out of 5 by from Great Machine with one design flaw I bought this trimmer head with the FS-KM straight shaft trimmer attachment last year, and had no problems with it untill feburary of this year. Now, the power this unit has is awesome. For what I use it for it works great. HOWEVER, when transporting on a trailer rack, if the engine bounces up and down, it WILL break the engine mount for the shaft, therefore allowing the engine to spin when full throttle, thus not having alot of power and torque down at the head. It happened once with a rack I had that didn't have an engine support, so I got a new one with an engine support, and no more than 2 weeks later it broke again, back in the shop for more warranty work. This unit is a great unit for the 'heavy homeowner', not good if you store it on a trailer rack. This is the only major design flaw that I can see, other than that it is an awesome unit.
Date published: 2018-07-03
Rated 5 out of 5 by from Love my KM91R I bought this unit because I needed a hedge trimmer with some reach, but saw the potential with all the attachments that I could handle a lot of jobs with this. The adjustable hedge trimmer works like a champ. With a gas hedge trimmer, I usually needed about an hour to hour and a half to do my hedges (larger yard), and some spots were almost impossible to reach. With the KombiSystem trimmer, it took me 25 minutes. Recently I added the cultivator because our garden got out of hand with weeds. I took the cultivator to it and it looks immaculate. Starting is easy, it runs and idles well. No drama, no fuss. Just works. For my needs, the 91 is JUST enough horsepower. If I had more cultivator work to do, I'd probably want a bit more horsepower than the 91. For hedge trimming it's plenty and then some. I'll be adding an edger, string trimmer, and blower over time. We'll see how they run on it. My biggest suggestion is to look for a good after-market harness. The shoulder strap is usable, but not great. Better than nothing, but a true harness is a better idea.
Date published: 2018-06-11
Rated 5 out of 5 by from PLASTIC GETS HOT I have the 91 r and all in all it's a great power head.The 4 stroke (4mix) runs more like a 4 stroke than a 2 stroke. The throttle Is less responsive than a 2 stroke. And it seems to only have 3 speeds low, medium and high. I dont see any problems with how it runs its just different than I expected. It's easy to start and warms up quick. My only real complaint is that the actual head gets very hot when running which normally wouldn't be a problem but when you turn it sideways to edge sometimes your arm may bump the plastic and it's hot enough that you cannot leave it there for very long without getting burned. The next model they should stand the plastic off of the motor a little taller to keep it from getting the plastics quite so hot. I have not owned it long enough to give a good review about the reliability And durability but I've owned other stihl products and I've been very pleased with how they hold up with through the years
Date published: 2018-06-09
Rated 5 out of 5 by from Great power head This 91 power head is work horse. No matter what attachment I’ve run it powers through, trimmer, edger, tiller, pole saw. 1 small slight problem, it needed a slight adjustment to stay running. The factory setting on the carb was quite lean for emission reasons I’m sure. It would start, but like to die unless you feathered the throttle a bit till it was warm. I made a small 1/8 th inch turn on the L needle and haven’t had an issue since. I’ve used it almost everyday since I’ve bought it 3 weeks ago.
Date published: 2018-05-18
Rated 5 out of 5 by from Enough power without all the weight I had the older KM5? home owner model for 12+ years when it had a fatal fall this spring. We had used it hard and put it away dirty for many years. We did find that when using the cultivator tool, it just did not have enough to dig through the garden dirt without fluffing it first and when using the pole saw would some times bog down. We recently picked up the KM91R. I was a thinking about getting the smaller easy start unit, but decided on the larger engine.I am glad I chose the bigger unit. The difference is night and day.The mulcher plows through the dirt like nothing, the angled hedge attachment (with and without extension) took down a 40 year old vine with ease.Snap on the trimmer and mow down all the tangled weeds in minutes.The pole saw easily takes down 3-4" branches and the blower attachment makes clean up a breeze!The weight difference is negligible compared to the extra power for plowing through tough jobs. I would definitely recommend this for the home owner and professional!
Date published: 2018-05-10
Rated 5 out of 5 by from Great quality Great customer service love stihl products will buy again
Date published: 2018-05-09
Rated 5 out of 5 by from Easy to start, fuel efficient, has a lot of power. I used my Stihl trimmer for the first time 04/10/2018. The unit started on the first pull. I have a brick fence around my yard which means there is a lot of timming to do, front and back side of the fence. The unit worked flawlessly and did not require refueling during the process. It does not bog down and did not require full throttle at any time during the operation. It is a fine piece of equipment. Best trimmer that I have ever owned. Cost a lot more than the ones I had in the past but looks like it is worth it.
Date published: 2018-04-11
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