We wish this wasn’t the case, but such is life sometimes. It also bears mentioning that, while the Stihl FS 91 R does feature a 4-stroke engine, it still requires premix fuel. So, for whatever it’s worth, you’ll have to stop less often for refueling, but you’re not getting the best fuel economy with this model. The Stihl FS 91 R finished in 7th place here. An initial efficiency test, whereby we ran 8 oz of fuel through each model, proved that most of our string trimmers could run for longer on the same amount of fuel. Granted, the FS 91 R was not the most fuel-efficient model we tested.
STIHL BROOM FULL
And, with a full tank, the Stihl FS 91 R will last for just over an hour before you’ll need to stop to refuel. Making fewer trips back to the truck to refuel will ultimately save you time, and consequently, money. Referring back to that tradeoff, here’s the good news: 24 oz. Of course, many pros will throw on ear protection, so this complaint could be a minor one depending on who uses it. Far and away the loudest model we tested, this string trimmer would benefit from a better muffler. The FS 91 R measured 106 dB(A) at the ear and 80 dB(A) at 50 ft. Noise is another complaint we had with this model, and it comes as something of a surprise, as Stihl generally handles sound output very well. While the trimmer weighs in at 12.1 lbs on an empty tank, practically speaking, you’ll start your day lugging around almost 14 lbs. It has the largest tank of any of the models we tested at 24 oz, but that kind of fuel capacity adds a lot of weight with a full tank of gas. On the other hand, Stihl makes some tradeoffs with this model. And this trimmer feels comfortable enough: it has the rubberized handles, an easy-to-access throttle, and an appropriately long shaft that won’t force too many people to lurch around the yard. The Stihl lineup has a reputation for comfortability, among other things. On the one hand, Stihl sinks a lot of effort into designing tools that lawn care Pros keep coming back to, and with good reason. The truth is that we’ve got a bit of a mixed bag here. To say that the ergonomics of the Stihl FS 91 R could use a lot of work would be overstating the case by a large margin. So, where’s the proverbial chink in the armor here? Let’s take a look at the many things that this piece of equipment does right, and the few things that could use some refinement.
In typical Stihl fashion, this trimmer offers a lot of Pro-level performance and runtime. Today, we’re taking another gander at our 4th-place finisher, the Stihl FS 91 R String Trimmer. One of the things we like to do after a shootout is to go back to each individual model we tested and take a closer look at it. If that sounds like something you’d be interested in, you can read about the testing procedures and results here. We wanted to see which brand offered the best performance, ergonomics, features, runtimes, and value. While the work doesn’t really slow down at this time of the year in Florida, those of us who review tools for a living had a great opportunity to put 10 of the OPE industry’s best string trimmer models up against each other.
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