KM 90 R

KM 90 R
This professional-grade KombiMotor features a powerful, low-emission engine and 15% more engine power than the KM 56 RC-E.

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

  • Built in the USA
    Indicates products that are built in the United States from domestic and foreign parts and components.

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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.
  • 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.
  • 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!
  • 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.
  • 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.
  • 14 optional attachments available 
    Create a custom yard care system with up to 14 optional attachments – trim, edge, cultivate, prune, clean up and more!
  • 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.
  • 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.


28.4 cc (1.73 cu. in.)
0.95 kW (1.27 bhp)
4.5 kg (9.9 lbs.)
530 cc (18.0 oz.)
Weights shown are for powerheads only.

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.


KM 90 R is rated 4.9 out of 5 by 83.
Rated 5 out of 5 by from Really great tool all around!!! I bought my KM 90 with a Power Scythe and the combination of those two things can cut through a lot of material, leaving a clean cut. The powerhead is easy to start and lightweight for the power and torque it puts out. I'm excited to try out other attachments!!
Date published: 2016-12-04
Rated 5 out of 5 by from This thing is a beast! Quit buying other junk! Starts fast and easy and has plenty of power! Don't have a bad thing to say about it! I am sold on Stihl products and have now purchased a chainsaw and a leaf blower!!! Will be getting the brush knife kit!!! Love Stihl!!!
Date published: 2016-12-03
Rated 4 out of 5 by from Good overall This product is great if you are a one man show. Obviously can use only one attachment so not great if you like to share the work. I have had for just over a year and it has worked well, biggest issue was the bolt to attach and un-attach got stripped.
Date published: 2016-11-08
Rated 5 out of 5 by from Makes lawncare as EZ as 123 When you got the correct tool it makes the job easy. This is the first Stihl product I have owned and as long as it continues to prove itself, it won't be the last. I bought the blower attachment, straight shaft trimmer, and straight shaft edger. When I got this thing home and snapped in the edger I was sold. The power behind the blade made it so easy to edge that I had to pick up my pace to keep with it. Before I knew it I was in the neighbors' yard. I equally love the rest of the attachments. The KM 90R even gets used with the blower attachment to dry my Crewmax Tundra after washing. With summer temperatures over 100 degrees and high humidity, this tool gets the job done much quicker. Also, it makes lawncare a lot funner and more enjoyable.
Date published: 2016-11-05
Rated 5 out of 5 by from Great Product If you are in the market for a great multi tool this is it. I have several attachments , pole saw, brush cutter, hedge trimmer, and edger. It does it all, and is great on fuel and is really easy to start. Highly recommend
Date published: 2016-10-29
Rated 5 out of 5 by from Nice unit with many available attachments I very much like the km90r. starts quick and easy and has plenty of power. My only gripe is the price of the km90r+Line head trimmer attachment over the fs90r when the only real difference that I can see is the split shaft. With that said I would still recommend the km90r to anyone wanting to frequently change out attachments.
Date published: 2016-10-17
Rated 5 out of 5 by from does everything needed great torque ,works quickly, a little heavy although
Date published: 2016-09-15
Rated 5 out of 5 by from Versitile Easy to use and has many attachments. Will be buying more attachments as needed.
Date published: 2016-09-14
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You Will Also Need

For Your Safety


The STIHL KombiSystem - Power and Versatility - Video
Product Instruction Manual (PDF)
Product Safety Manual (PDF)
STIHL Limited Warranty
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