MS 171

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A lightweight, fuel-efficient chainsaw with reduced-emission engine technology.

Product Description

The STIHL MS 171 is part of the lightweight generation of STIHL chainsaws with reduced emission technology – a significant benefit for users because it saves fuel even as it cuts exhaust emissions. The MS 171 also has the STIHL pre-separation air filter, which can extend filter life up to five times over previous models.

Model Features

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

    More information

  • Anti-Vibration System
    STIHL has developed 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.
  • Side-Access Chain Tensioner
    The side-access chain tensioner makes it much more convenient for the user to adjust the saw chain with a bar wrench as opposed to the typical location of the guide bar adjustment screw.
  • Translucent Fuel Tank
    Allows operator to easily check fuel level before starting work.


31.8 cc (1.94 cu. in.)
1.3 kW (1.7 bhp)
4.3 kg (9.5 lbs.)
280 cc (9.5 oz.)
180 cc (6.1 oz.)
3/8" PMM3
GUIDE BAR LENGTHS (Recommended ranges)
30 to 40 cm (12" to 16")
STIHL recommends #3610 (61 PMM3 55) OILOMATIC® saw chain and 16" 3005 000 3913 Ematic™ guide bar combination. The actual listed guide bar length can vary from the effective cutting length based on which powerhead it is installed on.

Important Information

* The actual listed guide bar length can vary from the effective cutting length based on which powerhead it is installed on.

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.


MS 171 is rated 4.1 out of 5 by 218.
Rated 5 out of 5 by from Very good saw for home use I have put this saw through a lot of work and it’s been awesome. Very dependable would highly recommend for medium level work.
Date published: 2019-11-07
Rated 5 out of 5 by from Perfect utility chainsaw Very pleased with the purchase of this saw. Lots of power and performance in a lightweight package. Perfect for tree maintenance, cutting firewood, and clearing shooting lanes on hunting grounds. I recommended it to a friend who also bought one. No regrets.
Date published: 2019-11-05
Rated 4 out of 5 by from Very good, light purpose saw I've had my MS171 for two years. Wanted to put it thru the paces before commenting. First, it is a light duty limbing, small diameter bucking saw. Use it for that and anyone should be pleased. Mine has been bullet proof in it's dependability. Starts, even after prolonged periods, on the third or fourth pull. I run VP 50:1 93 octane fuel exclusively and Stihl bar oil. It is cleaned regularly. I have cut/bucked/limbed over 30 trees, mostly hackberry and cedar. I also have a local tree service dump their mixed hardwoods on my property to be bucked and split. Usually 4-5 25 foot boom truck loads a season. I burn wood and free wood, dirty, mixed variety or otherwise, is good wood, especially in January and February. My 50cc saws do the bigger stuff, but the 171 is a good little saw for it's intended purpose. And the older I get, the more use it seems to get....Oh yeah, if you have to ride overgrown fence rows, the 171 is handy as a shirt pocket. Very pleased with my purchase and service from my dealer.
Date published: 2019-11-03
Rated 1 out of 5 by from Overall worthless I was misled by Stihl salesman, the 171 is a limb saw. He said medium duty, multipurpose. The chain was worn out in one use, the saw overall is junk. I have use Stihl products over 20 years and will not reccomend what Stihl makes now to anyone.
Date published: 2019-10-29
Rated 4 out of 5 by from Great little saw This is my first Stihl product. I the past I have owned a Poulon Pro and a Craftsman chainsaw . I purchased this saw after a storm broke my 45' tall elm tree in half. It isn't really the right saw for this job - I should have bought a bigger saw but had a budget to stay under. The saw started up easily each time. We ran four tanks of fuel through it and cut limbs that were over a foot in diameter. This little saw gave us no problems and seemed to punch well above its weight. The vibration dampening works well; I never felt the vibration "tingle" after running it for an extended amount of time. It didn't cut as fast as I liked and it bogged down at times, but if I just let the saw work, it would get though the toughest, thickest logs we had.
Date published: 2019-10-28
Rated 4 out of 5 by from hard starting, but cuts easily good saw, but harder to start than the other Stihl products I have owned.
Date published: 2019-10-23
Rated 4 out of 5 by from MS 171 notes Bought this after hurricane Michael Oct 2018 to trim and remove tree damage. Saw worked well and cut everything OK. It is a lightweight saw, so if you want to cut a big oak, better go get a bigger with Stihl. Recommend you use pre-mix gas/oil.
Date published: 2019-10-11
Rated 4 out of 5 by from great lightweight saw saw handles great for trimming and general cutting of trees. The lightweight saw wont wear you down.
Date published: 2019-10-09
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Standard Features

  • Common Features for Chainsaws
    View the features common to many STIHL chainsaws.

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