Stihl FS 91 R vs DeWalt DCST972X1 String Trimmer Comparison

The Stihl FS 91 R String Trimmer and DeWalt DCST972X1 String Trimmer are two of the best string trimmers on the market. Both offer great value for money and are powerful, durable tools that have been designed to cater to different requirements and price ranges. This comparison will help you choose the right trimmer for your needs. . The Stihl FS 91 R vs DeWalt DCST972X1 String Trimmer Comparison is given below-

Stihl FS 91 R vs DeWalt DCST972X1 String Trimmer Comparison

Here we compare Stihl FS 91 R vs DeWalt DCST972X1 String Trimmer based on the following Parameters.

1. Power and Engine

The Stihl FS 91 R String Trimmer is an efficient tool for trimming grass and weeds, powered by a high-performance 27.2 cc engine that can handle the toughest work. Its dependable, low-emission engine delivers the power to run for long periods of time.

The DeWalt DCST972X1 String Trimmer has all the features required to help you complete your outdoor tasks with ease and efficiency. Equipped with a Brushless motor, it allows you to get more out of your trimmer in the form of more precise control and less vibration, heat, and noise while working in tough conditions.

When comparing power and engine between these two trimmers, the Stihl FS 91 R boasts a powerful 27.2 cc engine that offers plenty of torque, an impressive power output up to 8500 RPMs that allow the user to cut through thick weeds, brush, and grass-like butter.

On the other hand, The DeWalt DCST972X1 is equipped with a brushless motor which provides ample power along with far less heat dissipation when compared to the Stihl trimmer’s carburetor system.

This greater efficiency means you’ll be able to finish projects faster without sacrificing any power output or having to worry about potentially damaging sensitive components due to excess heat generated over time from usage.

2. Usability

The Stihl FS 91 R string trimmer is an incredibly powerful, durable machine that can tackle even the toughest of jobs. With its heavy-duty steel construction, this trimmer provides plenty of power and long-lasting performance.

Its ergonomic design allows for a superior level of comfort and control, while its Easy2Start technology ensures quick and easy starts in any weather conditions. This model also includes a variety of features such as adjustable handle designs, a safety guard blade guard system, and a three-step anti-vibration system to reduce fatigue during use.

The DeWalt DCST972X1 string trimmer is an advanced, professional-grade tool that offers excellent performance and durability. Equipped with a high-efficiency motor and professional-grade construction, this trimmer delivers plenty of power and precise trimming capabilities.

It features an ergonomic design to minimize fatigue while allowing for comfortable control over the cutting line, as well as dual line spools to help you get through your jobs faster. Furthermore, this tool is equipped with QuickLoad™ technology for easy loading of line spools and a string wrench which helps make trimming chores even easier to complete.

3. Features

The Stihl FS 91 R String Trimmer features a powerful two-stroke engine that is designed for maximum efficiency. It also has an adjustable handlebar with ergonomic design for reduced fatigue and enhanced user comfort. The trimmer also comes with an Easy2Start system and AutoCut 5-2 head for fast, precise and reliable trimming. With easy conversion to a hedge trimmer or edger, it’s suited to any trimming task.

Meanwhile the DeWalt DCST972X1 String Trimmer packs advanced features like Brushless Motor technology which allows it to be both more efficient and powerful than standard motor types. It also features a variable speed trigger and aluminum cut-off blade for quick line feeding plus an extended reach design for optimal balance while gripping the trigger switch.

Additionally, its patented in-line handle position with anti-friction control knob enables better maneuverability in tight areas of your garden.

4. Versatility

The Stihl FS 91 R String Trimmer is one of the most versatile trimmers out there. It has a wide range of features that makes it suitable for a variety of tasks, from trimming grass and weeds to edging pathways and more. Its ergonomic design and adjustable handle make it easy to maneuver on any terrain. Plus, its low weight (just over 9 lbs) means that it can be used by both professionals and amateurs alike.

In comparison, the DeWalt DCST972X1 String Trimmer is just as versatile as the Stihl trimmer but with even more power. This trimmer comes with a powerful motor allowing for up to 20% longer run time when using an 18V DeWalt battery.

Additionally, its unique design includes an adjustable head angle as well as a rubber grip on the handle for added comfort. With this combination, professionals or hobbyists can easily trim in tight or hard-to-reach areas without losing control or sacrificing precision.

When it comes down to it, both of these string trimmers offer great versatility while getting the job done right no matter what kind of terrain you’re working on.

The Stihl model is perfect for those who need a lightweight and easy-to-maneuver trimmer with plenty of features while being budget-friendly; whereas, the DeWalt model offers superior power and precision at a slightly higher price point – making it ideal for professional use or larger jobs.

Stihl FS 91 R vs DeWalt DCST972X1 String Trimmer Pros and Cons

The Pros and Cons are given below-

Stihl FS 91 R String Trimmer


  • High performance engine with excellent power to weight ratio for superior cutting and extended use
  •  Easy to start with no priming or choke controls needed
  •  Easy to maneuver with superb ergonomics and an adjustable handlebar
  •  Capable of tackling tough jobs despite its light weight


  •  Semi-mesh guards require cleaning more often than solid guards
  •  Fewer accessories available compared to the DeWalt DCST972X1 String Trimmer

DeWalt DCST972X1 String Trimmer


  • Heavy duty motor delivers enough power for larger jobs while still remaining lightweight and easy to maneuver
  •  Durable solid guards protect the user from debris that may fly out from near trimmer head
  •  Adjustable handlebars provide better ergonomic grip and can be converted between straight shaft and curved shaft models as needed
  • Comprehensive accessory system allows you to customize your trimmer as needed


  • Slightly heavier than Stihl FS 91 R String Trimmer due to its heavier motor

Stihl FS 91 R vs DeWalt DCST972X1 String Trimmer Final Verdict- Which is better and why?

The final verdict on the Stihl FS 91 R String Trimmer vs DeWalt DCST972X1 String Trimmer Comparison is that each trimmer is designed for a particular purpose. The Stihl trimmer is designed for larger, more commercial jobs while the DeWalt trimmer is better for residential needs.

The Stihl has a more powerful motor making it suitable for tougher jobs while the DeWalt is lighter and easier to maneuver between obstacles. The DeWalt also has a longer run time and adjustable speed settings providing greater control and precision when using it in sensitive areas.

Ultimately, if you’re looking for a more commercial job then the Stihl would be better, but if you are going to do residential work then the DeWalt may be the better choice as its lighter weight makes it easier to use around obstacles.


Q1. What type of engine does the Stihl FS 91 R String Trimmer have?

A1. The Stihl FS 91 R String Trimmer has a low-emission 27.2cc 4 Mix® engine.

Q2. How does the DeWalt DCST972X1 String Trimmer compare to the Stihl FS 91 R?

A2. The DeWalt DCST972X1 comes with a Quiet 56V brushless motor and delivers power equivalent to a 32cc gas engine.

Q3. What is the maximum speed of the Stihl FS 91 R String Trimmer?

A3. The maximum speed of the Stihl FS 91 R String Trimmer is 9,500 rpm.

Q4. What type of cutting head does the DeWalt DCST972X1 include?

A4: The DeWalt DCST9721X1 includes an automatic quick feed line advancement system and a bump-feed line trimmer head with 65ft of string trimmer line included for easy line advancement when needed.

Q5. What is the ergonomic design for Stihl FS 91 R or DeWalt DCST972X1?

A5: The Stihl FS 91R features an adjustable loop handle that can be rotated to your desired height for improved grip while trimming and reduced fatigue along with an adjustable rear handle angle that allows you to adjust it just as easily as you would adjust your lawnmower blades. Whereas, the DEWALT DCST972X features an adjustable auxiliary handle which helps in better grip and reduced stress from vibrations, providing improved comfort while operating and completing projects faster with less effort than traditional string trimmers on market today


I hope you like reading on Stihl FS 91 R vs DeWalt DCST972X1 String Trimmer Comparison.

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