Selection Chainsaws and Telescopic Pole Pruners

MS 391

Top of the range, high torque farmer chainsaw

General

MS 391
More pictures

Easy-to-manage, high-torque chainsaw for improved performance and user comfort when harvesting wood or sawing firewood. High torque over a wide range of speeds. Up to 20% less fuel consumption and up to 50% lower emissions compared with the previous model without 2-MIX technology.

Versions

Price

* Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change 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.

Technical data

MS 391

Technical data

Recommended bar length cm/inch 50cm/20"
Displacement cm³ 64.1
Power output kW/bhp 3.3/4.5
Weight kg 1) 6.2
Power-to-weight ratio kg/kW 1.9
Sound pressure level dB(A) 2) 105
Sound power level dB(A) 2) 117
Vibration values left/right m/s² 3) 4/4
STIHL Oilomatic saw chain pitch/type 3/8" RM

1) Without fuel, without bar and chain
2) K-factor according to DIR 2006/42/EC = 2.5 dB (A)
3) K-factor according to DIR 2006/42/EC = 2m / s ²

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.

Features

MS 391

Standard features

  • Reduced-emission engine technology Zoom
    Reduced-emission engine technology

    2-stroke engine with stratified charge. A fuel-free layer of air is created between the burned charge in the combustion chamber and the fresh charge in the crankcase, reducing the amount of fuel lost during the charge cycle. This results in more power with a lower weight, up to 20% lower fuel consumption than regular 2-stroke engines and significantly reduced exhaust emissions.

  • Advanced combustion technology Zoom
    Advanced combustion technology

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

  • Compensator Zoom
    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.

  • Pre-separation air filtration system Zoom
    Pre-separation air filtration system

    STIHL long-life air filtration systems with pre-separation achieve perceptibly longer filter life compared with conventional filter systems. Air drawn in is swirled. The larger, heavier particles are ejected. The pre-cleaned air is routed to the air filter via the pre-separator duct.

  • Decompression valve Zoom
    Decompression valve

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

  • Anti-vibration system Zoom
    Anti-vibration system

    Intense vibration at the handles of power tools can lead to long-term effects on blood vessels in the hands and arms. STIHL has therefore developed an effective anti-vibration system whereby the oscillations from the machine's engine are dampened which significantly reduces vibrations at the handles.

  • Ematic chain lubrication system Zoom
    Ematic chain lubrication 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 by up to 50%.

  • Variable-displacement oil pump Zoom
    Variable-displacement oil pump

    Allows a precise, demand-based delivery of oil. It's possible to reduce oil production by up to 50% in the E position. For very long cutting attachments or very dry wood, an additional volume of oil can be added by the user. similar to illustration.

  • Single-lever master control Zoom
    Single-lever master control

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

  • Side chain tensioner Zoom
    Side chain tensioner

    The tensioning screw can be found on the side of the chain saw through the sprocket cover. This removes the need for contact with the sharp saw chain.

  • Tool free filler caps Zoom
    Tool free filler caps

    Special catches on the fuel and oil tanks for easy opening and locking without the need for tools.

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.

Accessories

MS 391

Accessories

    • Rollomatic E 3/8" (10 teeth) Zoom
      Rollomatic E 3/8" (10 teeth)

      The body of made of 3 eletrically-welded metal plates, the middle plate is extensively hollowed out. Low weight, high stability.

    Technical data
    Groove width 1,6 mm
    Number of teeth 10
    Pitch 3/8 Inch

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • Rollomatic E 3/8" (10 teeth) Zoom
      Rollomatic E 3/8" (10 teeth)

      The body of made of 3 eletrically-welded metal plates, the middle plate is extensively hollowed out. Low weight, high stability.

    Technical data
    Groove width 1,6 mm
    Number of teeth 10
    Pitch 3/8 Inch

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • Rollomatic E 3/8" (10 teeth) Zoom
      Rollomatic E 3/8" (10 teeth)

      The body of made of 3 eletrically-welded metal plates, the middle plate is extensively hollowed out. Low weight, high stability.

    Technical data
    Groove width 1,6 mm
    Number of teeth 10
    Pitch 3/8 Inch

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • Rapid Micro (RM), 3/8" 1.6 mm Zoom
      Rapid Micro (RM), 3/8" 1.6 mm

      Good all-round comfort chain with low vibration levels, smooth cutting behaviour and low chatter.

    Technical data
    Drive link gauge 1,6 mm
    Pitch 3/8 inch

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • Rapid Micro (RM), 3/8" 1.6 mm Zoom
      Rapid Micro (RM), 3/8" 1.6 mm

      Good all-round comfort chain with low vibration levels, smooth cutting behaviour and low chatter.

    Technical data
    Drive link gauge 1,6 mm
    Pitch 3/8 inch

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • Rapid Micro (RM), 3/8" 1.6 mm Zoom
      Rapid Micro (RM), 3/8" 1.6 mm

      Good all-round comfort chain with low vibration levels, smooth cutting behaviour and low chatter.

    Technical data
    Drive link gauge 1,6 mm
    Pitch 3/8 inch

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • Filing kit Zoom
      Filing kit

      Includes file holder with round file, flat file and file gauge in a sturdy case.

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • 2-in-1 EasyFile Zoom
      2-in-1 EasyFile

      Practical tool for quickly sharpening the teeth and depth gauge in a single action. Ideal for occasional users. For .325", 3/8" and 3/8" P saw chains. Includes round and flat files.

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • HP Super two-stroke engine oil Zoom
      HP Super two-stroke engine oil

      Semi-synthetic oil with low-ash additives for clean low-smoke burning. 'Low-smoke oil' performance class: JASO-FD, ISO-L-EGD. Fuel/oil ratio: 50:1. Particularly recommended for STIHL 4-MIX engines.

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • SynthPlus chain oil Zoom
      SynthPlus chain oil

      Semi synthetic high performance lubricant is made from high grade base oils (refined oils) which prevents resinification during prolonged downtimes. Outstanding protection against wear.

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • MotoMix Zoom
      MotoMix

      STIHL MotoMix is our patented premixed fuel, specially blended for ultimate performance. This 50:1 mixture is a combination of premium non-ethanol, high-octane motor fuel and our highest quality STIHL HP Ultra oil. It also stays fresh in your equipment over extended storage periods.

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • Chainsaw case Zoom
      Chainsaw case

      Made of durable plastic. For safe storage and transport of all chainsaws with bar lengths up to 45cm / 18".

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change without notice.

    • Carry bag for chainsaws Zoom
      Carry bag for chainsaws

      Made from sturdy nylon. For safe storage and transport of all chainsaws with bar lengths up to 45cm / 18". With small additional pocket.

    Versions

    Price

    * Manufacturer’s recommended retail price updated as of February 2014. The manufacturer’s recommended retail prices are subject to change 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.

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