Stihl MS 661 MAGNUM

Stihl MS 661 MAGNUM


The Stihl 661 Magnum chainsaw is a professional-grade powerhouse designed for tackling the toughest felling, de-limbing, and bucking jobs with ease. Powered by gas, this chainsaw embodies robust dependability, making it the go-to choice for professionals across various industries.

Stihl MS 661 Power and Performance

The MS 661 MAGNUM® stands as a testament to professional-grade power, relying on a gas-powered source that unleashes a robust 16.5-pound powerhead. Its recommended 25-inch OILOMATIC® chain enables precision and efficiency in felling, de-limbing, and bucking sizable trees.

Stihl MS 661 Engine Features

Featuring a non-electronic design, the chainsaw boasts a fuel-efficient engine that minimizes operational costs while ensuring reliability. A low-maintenance air filtration system adds to its efficiency, catering to extended use in various conditions.

Stihl MS 661 Cutting Abilities

With its STIHL anti-vibration management system and compatibility with extended guide bars, the MS 661 MAGNUM® showcases enhanced handling and reduced operator fatigue. Its prowess extends across forestry, municipal, and professional tree services.

Benefits of Using the Stihl 661 Magnum

  • Reduced-Emission Engine Technology The chainsaw's commitment to environmental responsibility is underlined by the "Caring for Nature" seal, surpassing EPA and/or CARB exhaust emission standards, emitting zero or minimal exhaust emissions.
  • HD2 Air Filter A washable HD2 air filter embodies extended life and reduced maintenance costs, providing optimal engine protection even in dusty and dry environments, and allowing for longer run times between cleanings.

Practical Applications of the Stihl 661 Magnum

  • Decompression Valve Simplified starting is facilitated by the decompression valve, easing the effort required during ignition by temporarily reducing compression in the combustion chamber.
  • Anti-Vibration System STIHL's anti-vibration system minimizes handheld equipment vibration levels, ensuring operator comfort and reducing fatigue during prolonged use.

Maintenance Tips for the Stihl 661 Magnum

  • Adjustable Automatic Oiler The chainsaw's adjustable automatic oiler allows for customized lubrication of the guide bar and saw chain, adapting to varied cutting conditions and bar lengths.
  • Side-Access Chain Tensioner Enhanced user convenience is offered by the side-access chain tensioner, simplifying saw chain adjustments with a bar wrench.

Additional Features

The MS 661 MAGNUM® boasts fuel and oil caps with retainers, keeping them securely attached for added user convenience. The STIHL ElastoStart™ starter handle, equipped with a built-in shock absorber, reduces the force required when pulling the starter cord, smoothing out the cranking process.


The Stihl 661 Magnum emerges as a pinnacle of power, reliability, and environmental consciousness, catering to the diverse needs of forestry, municipal, and professional tree service professionals.


  1. What is the weight of the MS 661 MAGNUM?
    The MS 661 MAGNUM® weighs approximately 16.5 pounds, showcasing a robust yet manageable build for professional-grade operations.
  2. Does the MS 661 MAGNUM come with an adjustable chain tensioner?
    Yes, the MS 661 MAGNUM® features a side-access chain tensioner, providing users with the convenience of adjusting the saw chain using a bar wrench for different cutting conditions and bar lengths.
  3. How does the STIHL anti-vibration system benefit users?
    The STIHL anti-vibration system minimizes handheld equipment vibration levels. This vibration reduction significantly reduces operator fatigue during extended use, ensuring a more comfortable and efficient working experience.
  4. What makes the MS 661 MAGNUM environmentally conscious?
    The MS 661 MAGNUM® is designed with reduced-emission engine technology, emitting zero or minimal exhaust emissions. It exceeds EPA and/or CARB exhaust emission standards, demonstrating a commitment to environmental responsibility.
  5. Are there variations in guide bar lengths available for the MS 661 MAGNUM? Yes, the MS 661 MAGNUM® offers flexibility with guide bar lengths. The recommended guide bar length is 25 inches, but there might be other available lengths to suit diverse cutting requirements and preferences.

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    Reviews (5)

    April 3, 2023

    Lots of power

    I've owned this saw for 2 years and have cut a lot of wood with it and I have used it for my alaskan sawmill as well

    April 9, 2023

    Love this saw, simple design.

    I just special ordered this saw at my dealer, just a basic non electronic design ive been looking for. The saw feels perfectly balanced with a 25" bar and chain, weighing in at only 2 pounds heavier than my ms461 the power to weight is a perfect balance.

    April 10, 2023

    Dependable powerful

    Bought this a year ago because I needed to saw the handle a 3-ft bar and it's been tearing apart everything from pine to Red oak does very good job

    April 12, 2023

    Powerful saw, day in day out

    I bought my first 661 in 2016. After running Stihl for professional logging for many years, I was recommended to the 661 by a colleague. I had run many in the 70 and 80 cc range, but this 92cc saw is a whole new level. Since my first one in 2016, I have bought three more. They are very tough as well as powerful. Great for felling big trees off the stump, but not too heavy for delimbing. I run a 20” bar because I use it all day for everything. I recommend this for the professional. It is not a weekend worrier saw, very strong and will throw you if you are not holding on the correct way...not a toy

    Roy L
    April 16, 2023

    Best saw I’ve ever used!

    I originally went to buy the new 462c because of it being lighter and almost as much horsepower. My dealer didn’t have one so I decided to try the 661c. Man am I glad I did! It’s the baddest rig I’ve ever used, makes me look forward to running a saw. Its bad fast and you can’t choke it down with a 25 inch bar. Runs a 32 inch bar like it’s nothing. I have since used a brand new 462c side by side with it and it’s not close to the 661. It is slightly lighter but not really much felt difference but the 661 runs off and leaves it on power and torque. I had a pile of logs and would make 2 cuts with each right after the other. Both had brand new identical chains except the 661 had a 25 and the 462 had a 20. The extra power of the 661 is well worth the very slight weight difference. Both are very nice saws but I’d never trade the 661. It’s the goat of chain saws.