How many horsepower is a Stihl 391?

STIHL MS 391 FarmBoss® Chainsaw

General

Manouvrable, high-torque chainsaw for improved performance and user comfort perfect for preparing firewood. Extremely high torque over a wide range of speeds. Up to 20% less fuel consumption and up to 50% reduction in emissions compared to a STIHL 2-stroke engine of the same power output without 2-MIX technology.

Versions

Price

• Petrol Chainsaw - MS 391 - 50cm/20'' - FarmBoss

  $1,499.00*

*Prices are valid from the 05/09/2022 to 14/11/2022.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.

• Chainsaw Safety Guide

  

  Whether you’re a professional or an occasional user, you can never be too safe when it comes to operating any kind of power tool, particularly high performance tools like chainsaws.

  Chainsaw Safety Guide

Technical data

Technical data

1) Without fuel, without bar and chain

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.

• Chainsaw Safety Guide

  

  Whether you’re a professional or an occasional user, you can never be too safe when it comes to operating any kind of power tool, particularly high performance tools like chainsaws.

  Chainsaw Safety Guide

Features

Standard features

• 
  

  Pre-separation air filtration system

  The innovative long-life air filter system greatly extends the service life of the filter. Air routing removes larger particles of dirt, meaning the actual filter has less to do. So the saw can be used for longer without having to clean the filter.

• 
  

  Decompression valve

  The decompression valve is part of the easy start-system. The valve should be pressed before starting in order to reduce the compression pressure when starting, as well as the effort needed to pull the starter rope. The decompression valve is semi-automatic, meaning that it must be pressed manually before starting, but then closes automatically.

• 
  

  Advanced combustion technology

  Four overflow channels swirl the fuel-air mix before ignition, allowing for optimum combustion and highly efficient performance. The result: lower consumption and high torque across a broad rpm range.

• 
  

  STIHL anti-vibration system

  Intense vibration at the handles of power tools can lead to longer-term effects of blood vessels in the hands and arms. STIHL have therefore developed an effective anti-vibration system where by the oscillations from the machines engine are dampened which significantly reduces vibrations at the handles.

• 
  

  Compensator

  This controller in the carburettor prevents the fuel-air mixture getting richer as the air filter becomes clogged. The correct quantity of fuel is delivered to the carburettor depending on the quantity of air passing through the air filter. This keeps the fuel/air ratio in the combustion mixture constant and hence also the engine power. The filter doesn't need to be cleaned until an appreciable drop in power occurs.

• 
  

  Controlled-delivery oil pump

  The exact chain oil output can be adjusted maunally for varying conditions, allowing for a reduction of up to 50%.

• 
  

  Single-lever master control

  All important functions such as start, choke, throttle and stop are operated via a single lever.

• 
  

  Side-mounted chain tensioning

  The tensioning screw is located on the side of the chain saw through the sprocket cover. Chain side tensioning allows the saw chain to be retensioned effortlessly, avoiding any contact with the sharp chain.

• 
  

  STIHL Ematic-System

  The Ematic chain lubrication system ensures pinpoint lubrication of the saw chain links and guide bar rails. When used with STIHL OILOMATIC saw chain, it will provide maximum lubrication, longer wear and less oil consumption than conventional methods of chain lubrication. The Ematic system can reduce bar oil consumption up to 50%.

• 
  

  Tool free fuel caps

  Special caps on the fuel and oil tanks are designed for easy opening and locking without the need for tools.

Additional features

• 
  

  STIHL ElastoStart

  STIHL ElastoStart reduces the shock caused by the compression of the engine during starting. The compression shock is taken away from the users joints and muscles through a spring or rubber element in the starter handle.

We present some Product Technology features in product technology .

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.

• Chainsaw Safety Guide

  

  Whether you’re a professional or an occasional user, you can never be too safe when it comes to operating any kind of power tool, particularly high performance tools like chainsaws.

  Chainsaw Safety Guide

Accessories

Accessories

• • 
    

    Service Kit - MS 271 / MS 291 / MS 311 / MS 391

    Extend the working life of your product with STIHL convenient self-service kits. Inclusive of air filter, fuel filter and spark plug. Suitable for: MS 271 / MS 291 / MS 311 / MS 391
    *While stocks last

  Versions

  Price

  • Service Kit - MS 271 / MS 291 / MS 311 / MS 391 $39.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 
    

    FUNCTION 270° Chaps

    For occasional chainsaw applications. Anthracite and high visibility orange with denim look, 65% polyester, 35% cotton, elastic strap for enhanced comfort, light and breathable, Y-threading of closures for fast fitting and removal, reflective STIHL logo on right, extended cut protection area, EN 381, protection class 1 (=ˆ 20 m/s).

  Versions

  Price

  • Protective Chaps - Chainsaw - Function - 90cm $195.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 
    

    Multispray

    Multi function spray that cleans a number of tools and leaves a protective film that does not harden on the surface and thereby protects against corrosion. Rotating parts are lubricated. An essential all-rounder for every workshop. 400ml spray can.

  Versions

  Price

  • Multispray - 400ml $18.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 
    

    Guide bar leveler

    Tool for removing burrs from the guide bar. Ergonomically shaped plastic holder with flat file made of hardened tool steel.

  Versions

  Price

  • Guide Bar Dresser $59.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 
    

    Rapid Micro Comfort (RMC), 3/8"

    Based on the high-chain Rapid Micro. Comfort saw chain with low vibration, soft cutting behaviour and low chatter.

  Technical data	Value
  Chain pitch	9.32mm/3/8"
  Drive link thickness	1.6mm/.063"

  Versions

  Price

  • 3/8" Rapid Micro (RM), 1,6 mm, 50 cm $54.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 
    

    Chainsaw Case

    Made of durable plastic. For safe storage and transportation of petrol and electric chain saw models: MS 170, 171, 181, 201 T, 192 C-E, 211, 230, 231, 251, 240 C-M, 250, 261, 362, MSE 140, 180, (not MSE-C versions). Not suitable for MS 441.

  Versions

  Price

  • Chainsaw Case - Woodsman $100.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 
    

    Filing Vice - S 260

    Lightweight and convenient design. Easy to drive into the wood and fix the guide bar. Includes practical belt bag.

  Versions

  Price

  • Stump Vice - L 700 - Large $60.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 
    

    STIHL Moisture Meter

    The STIHL moisture meter is lightweight and easily fits in your pocket. It has an easy to read screen with a wristband for safe holding. A simple on-off button and a removable sensor cover.

  Versions

  Price

  • STIHL Moisture Meter $34.95*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 
    

    Rollomatic E - 3/8" - 11 Z

    High-quality standard with excellent cutting and piercing power. Main application: For high demands in professional applications during felling and bucking on chainsaws medium to high capacity. Rail body: Three-welded metal plates. The middle is cut out over a large area. This high stability at very favorable weight. Saw chain runs over exchangeable, robust bearing sprocket with 11 teeth, which must not be lubricated. Extremely robust Stern storage with 6 rivets.

  Versions

  Price

  • Guide Bar - Rollomatic E - 3/8" .063" - 50CM/20’’ $100.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 
    

    STIHL VarioClean

    Water based, alkaline detergent specifically for dissolving and removing organic oil residues and for cleaning air filters and housings. The detergent is biodegradable. Avoid contact with the eyes and keep out of reach of children.

  Versions

  Price

  • VarioClean - 500ml $20.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 
    

    Filing Vice - L 700

    Large and robust design. Can be easily driven into the wood.

  Versions

  Price

  • Stump Vice - S 260 - Small $40.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 
    

    Filing Kit

    The complete Kit for saw chain maintenance.

  Versions

  Price

  • File Kit - 3/8 $49.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

• • 

    Varioclean Special Cleaner

    Multipurpose biodegradable machine and parts cleaner. Water based, biodegradable, alkaline detergent specifically for dissolving and removing organic oil residues and for cleaning air filters and housings.

  Versions

  Price

  • Varioclean - 500ml $20.00*

  *Prices are valid from the 05/09/2022 to 14/11/2022.
  STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.

• Chainsaw Safety Guide

  

  Whether you’re a professional or an occasional user, you can never be too safe when it comes to operating any kind of power tool, particularly high performance tools like chainsaws.

  Chainsaw Safety Guide

Documents

Owners manuals and safety brochures

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