MS 391

Image of ms391
Our top-of-the-line chainsaw for farm and ranch.

Product Description

STIHL engine technology means low fuel consumption, longer run times and reduced emissions in this high-powered chainsaw. The MS 391 features our newest engine technology that adds fuel efficiency while reducing emissions as compared to other models. Though equal in weight, the MS 391 is more powerful than the MS 311. Add to that an optimal power-to-weight ratio and you have a chainsaw that’s cut out for the big jobs in field, farm and ranch. Felling trees, cutting firewood and cleanup after the storm just got a whole lot easier with the rugged MS 391.

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.

    More information

Specifications

DISPLACEMENT
64.1 cc (3.9 cu. in.)
ENGINE POWER
3.3 kW (4.4 bhp)
POWERHEAD WEIGHT
6.2 kg (13.67 Ibs.)
FUEL CAPACITY
600 cc (20.3 oz.)
CHAIN OIL CAPACITY
350 cc (11.8 oz.)
OILOMATIC® CHAIN
3/8" RS3
GUIDE BAR LENGTHS (Recommended ranges)
40 to 50 cm (16" to 20")
STIHL ROLLOMATIC®
POWER SOURCE
Gas
STIHL recommends #3624 (33 RS3 72) OILOMATIC® saw chain and 20" 3003 008 8921 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

WARNING! The occurrence called “kickback” can cause serious or fatal injury. Always read the instruction manual carefully before using your saw. STIHL uses a green and yellow color-coding system to help you select a powerhead, bar and chain combination that complies with the kickback requirements of ANSI Standard B175.1 (gasoline-powered saws) and §30 of UL 1662/ ANSI Standard B175.1 (electric chainsaws). Ask your STIHL dealer about safe operating procedures and the advantages of the STIHL Quickstop® chain brake, STIHL Quickstop® Plus (Q) additional chain braking feature, STIHL reduced kickback bars and STIHL low-kickback saw chains.

STIHL recommends the use of green reduced kickback bars and green low kickback chains on all STIHL chainsaws.

* 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.

Reviews

MS 391 is rated 4.4 out of 5 by 354.
Rated 5 out of 5 by from Amazing Chainsaw Cuts through logs like butter and is a work horse too.
Date published: 2019-11-11
Rated 5 out of 5 by from Handle bites Make the guide handle out of something useful rather than wet toilet paper
Date published: 2019-11-10
Rated 5 out of 5 by from Bought it 8 years ago Bought this saw 8 years ago after I burned up 3 cheap ones. I was cutting an old 6’ diameter white oak, that had fallen. I got a 20” and a 25” bar. I have to say that I hardly use the 20” bar. The saw finished that job and has started reliably since day one. It does sit for several months, but it cranks with ease. It does get heavy, and last year I bought a 261C as a back up. It’s cut everything I have needed it to with ease. I’ve not had any problems with it. I can’t ask for a better saw for what I use it for.
Date published: 2019-11-10
Rated 5 out of 5 by from Great power for the money I bought this saw for felling some medium size trees (16-24 inches in diameter). I've only used it a few times, but it cuts through red oak no problem. The only thing I didn't like wasn't even a problem with the saw, but the store had it tuned too rich when I bought it. For small trees, it's overkill, but it's a really good saw.
Date published: 2019-11-07
Rated 2 out of 5 by from It floods worse than the rain forest. I've got a ms170 that has been great for 10 years now. Had a Farm Boss for ten years and loved it. Then I had a stupit ideal and traded it in for a ms391. What a mistake. It's so hard to start and if you have your mouth right it floods out. Pull the plug and dry out then try again.
Date published: 2019-11-05
Rated 5 out of 5 by from What a saw I replaced a ms251 that I was tired of replacing bars due to the oiler clogging with this saw. I am impressed with the power of this machine and can say I might get my faith restored in stihl products. This saw cuts and OILS well so I feel it will handle the job I need it to do. I cut firewood for myself and sell it so the machine will get worked hard. I will send another review after a year but don't think my opinion will change.
Date published: 2019-10-30
Rated 4 out of 5 by from nice saw bought this to replace an aging 041.i like it alot,it is awesome on fuel i can easily cut a full pickup truck on one fuel and oil tank. it seems comfortable to use,and decently balanced.i considered going to a ms 362,but couldnt justify the price difference.my only disapointment is i think it could use a little more power,for a 60 cc saw if your cutting dry wood as i am logging tops and ends you can stall the chain.i am pulling a 20 inch bar,just seems like it could use a little more torque.other than that it is a good saw,and i feel i made a good purchase,
Date published: 2019-10-17
Rated 5 out of 5 by from Awesome This thing is awesome! More than enough power & easy to use
Date published: 2019-10-16
  • y_2019, m_11, d_16, h_23
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.2
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_354
  • loc_en_US, sid_ms391, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_stihl

Standard Features

  • Pre-Separation Air Filtration System
    This time-saving technology boosts the efficiency of the engine’s filter system, doubling the time between air filter cleanings. Air drawn into the engine is first separated via centrifugal force, ejecting the heavier dirt particles before being routed to the air filter. This pre-separation means less dirt to be captured by the air filter, resulting in less frequent cleaning and maintenance.

    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.
  • IntelliCarb™ Compensating Carburetor
    The IntelliCarb™ Compensating Carburetor is designed to automatically adjust the air/fuel ratio when the air filter becomes restricted or partially clogged and maintains the engine’s correct RPM. IntelliCarb™ uses air from the clean side of the air filter to control the diaphragm and flow of fuel. As the air filter becomes dirty and less air is available for the carburetor, the IntelliCarb™ system adjusts the fuel flow to compensate for the decrease in air flow. This is in contrast to typical carburetors that utilize this air from the “dirty” side of the air box.
  • 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.
  • Common Features for Chainsaws
    View the features common to many STIHL chainsaws.

We Also Suggest

For Your Safety

Support

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

Share

My Preferred Dealer