MS 171

MS 171
A lightweight, fuel-efficient chainsaw with reduced-emission engine technology.

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.

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

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  • 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.
  • Toolless fuel and oil caps with retainers
    Simply lift the lever and twist the caps to remove or tighten. There‘s no need to use a tool to tighten or loosen.


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 depending upon which powerhead it is installed.

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 4.3 out of 5 by 86.
Rated 2 out of 5 by from Extra light duty!!! For the novice only!!! Let me start by saying I have used chainsaws for over 40 years, I am no novice. This saw is as expected from Sthil, a very well put together power head, starts easy (hot or cold) has great ergonomics, very lightweight and easy to handle. Everything I looked for. I have a large model for felling and cutting to length,but the older I get it has become too heavy for limbing. I bought the MS171 for that purpose. It has not preformed as expected. The chain will not stay adjusted nor will it stay sharp. I have taken it back to the authorized dealer to be checked out to no avail. Next step is to modify an aftermarket bar and chain to make it preform as it should. For that reason I have to give the saw low marks.
Date published: 2016-12-17
Rated 5 out of 5 by from So far so good Used twice, both times a lot of cutting of small trees and saw performed well. Suggest to buy chain sharpening kit, as chain became dull after all of the cutting. Easy to re-sharpen chain, took less than ten minutes and chain was sharp again. Have all Stihl lawn support equipment and I am very satisfied with their performance as well.
Date published: 2016-11-09
Rated 5 out of 5 by from Light weight with plenty of power I am a first time stihl chainsaw buy and i love it easy starting with plenty of power. The price was great and i will recommend this saw to anyone.
Date published: 2016-11-09
Rated 5 out of 5 by from i love my ms171 the saw is good and light to use amd great to use to cutting firewood
Date published: 2016-11-05
Rated 5 out of 5 by from A great saw at a big box store price Bought this saw 2 years and about 6 gallons of fuel ago as a limber saw to relieve the ms291 from light duty work. Well, the ms171 as been used a lot where the bigger saw should of been used(didn't feel like cleaning two saws). I can go on for awhile about how great this saw is. The biggest reason for this review is for the folks looking at a big box store saw, this saw is worth the very few extra dollars over the big box store chainsaw. I have had them saws and you will not regret buying one of these. Great power, very light, easy on fuel and my wife doesn't mind using this saw. Happy wife, happy life!p.s. we heat our home with wood, so poor performing saws are no longer tolerated.
Date published: 2016-11-04
Rated 5 out of 5 by from the ms171 is a great chainsaw for the price we bought our home 11 years ago, there are 3 old massive mulberry trees on the property that need to be pruned every September, the job is JY normus due to the size and age of the trees, I have bought 4 saws (counting the stihl I got a week ago) since I've lived here, I always thought stihl was one of the better brands, but for whatever reason assumed they were to expensive since I only needed it once a year, but last week decided to get the ms171 because the other 3 saws I have used were all worthless chainsaws that lasted about a year (if that!!) I was surprised when I saw the price at the stihl dealer, it's actually not the most expensive on the list of the 4!!!!!! and the performance is amazing, easy to start, powerful, and so on... stihl makes a great saw, I just wish I had got one years ago. thanks stihl
Date published: 2016-10-09
Rated 3 out of 5 by from Works very well once it gets started. From cold start it is difficult to start As per the instructions when starting from a cold start I find that the choke should be on for at most one or two pulls before switching ti off. If you continue with choke, it floods very rapidly. Nothing about this in the directions in the owner's manuel. Once started up, it does a fine job.
Date published: 2016-10-06
Rated 5 out of 5 by from Great on fuel, amazing limbing and brush saw I run a small excavation/tree service, and the first day this saw got used, it was ran 9hrs, getting shut off only for fuel and lunch. Ran all day on less than a third gallon of fuel. I allways run Stihl Platinum 2-stroke oil, and Stihl Woodcutter bar oil. I own 7 Stihl chainsaws, and the all get used heavily. These saws are a BARGAIN for what you pay, compared to how much they do, and how long they last. I will be buying a second one very shortly, because my guys love that saw! Extremely light, and efficient.
Date published: 2016-09-29
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Standard Features

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

You Will Also Need

For Your Safety


Chainsaw Safety and Maintenance - Video
Product Instruction Manual (PDF)
Product Safety Manual (PDF)
STIHL Limited Warranty
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