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Selection Petrol chainsaws for agriculture and landscaping

MS 391

Top of the range, high torque farmer chainsaw

General

MS 391
More pictures

Great for felling firewood and for building with wood. Long-life air filter service life for very long filter service life, economical 2-MIX engine, and decompression valve for effortless starting.

Versions

Price

* Manufacturer's recommended retail price updated as of 2018. 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

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 level left/right m/s² 3) 4/4
STIHL Oilomatic saw chain type 3/8" RM
Recommended bar length cm/inch 50cm/20"

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

  • 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.

  • 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.

  • Controlled-delivery oil pump Zoom
    Controlled-delivery oil pump

    Different bar lengths, wood types and sawing techniques require different amounts of oil. The controlled-delivery oil pump allows the user to select just the right amount of oil for the job at hand.

  • 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.

  • 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.

  • STIHL anti-vibration system Zoom
    STIHL anti-vibration system

    Precisely calculated buffer zones minimise the transfer of engine and saw chain vibrations to the front and rear handles. The chainsaw therefore runs noticeably smoother. This allows the user to save their strength and work longer.

  • STIHL Ematic System Zoom
    STIHL Ematic System

    Compared to conventional bars without Ematic, the STIHL Ematic system reduces the consumption of chain lubricant by up to 50 %, depending on the type of wood and the cutting attachment used. This system comprises a STIHL Ematic or Ematic S guide bar, a STIHL Oilomatic saw chain and a variable-flow or reduced-flow oil pump. As a result, virtually every drop of chain lubricant is delivered to exactly the right spot.

  • 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-mounted chain tensioning Zoom
    Side-mounted chain tensioning

    Side-mounted chain tensioning makes it easy to tension the chain safely.

  • Tool free fuel caps Zoom
    Tool free fuel caps

    Special caps to open and close the tank cap quickly, easily and without tools.

Additional features

  • STIHL ElastoStart Zoom
    STIHL ElastoStart

    Due to compression pressure, jerky stresses occur when starting internal combustion engines. The damping element in the ElastoStart special starter grip alternately absorbs and releases force according to the compression pattern. The result is smooth, even starting.

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.

Accessories

MS 391

Accessories

    • 2-in-1 file holder Zoom
      2-in-1 file holder

      Practical tool for quickly sharpening the teeth and depth gauge in a single step. Ideal for occasional users. For 1/4" P, 3/8" P, .325", 3/8" and .404" saw chains, integrated file tolerance compensation (only from STIHL).

    Versions

    Price

    * Manufacturer's recommended retail price updated as of 2018. 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 2018. 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 2018. The manufacturer's recommended retail prices are subject to change without notice.

    • DYNAMIC SPECIAL helmet set Zoom
      DYNAMIC SPECIAL helmet set

      Well established helmet set with new visor system, high noise protection and anti-dazzle peak. EN 352, EN 397, EN 1731.

    Technical data
    Ear protection SNR 28 (H:35, M:26,L:16)
    Sound level 108 dBA
    Helmet material ABS (G22)
    Inner fittings 4-Point
    Light penetration 75 %
    Weight 620,5 g

    Versions

    Price

    * Manufacturer's recommended retail price updated as of 2018. The manufacturer's recommended retail prices are subject to change without notice.

    • FUNCTION chainsaw boots Zoom
      FUNCTION chainsaw boots

      Entry level model made of high quality full grain leather, with high grip soles and breathable textile lining. Also protects against moisture, wear and abrasion. Protection according to EN 17249, protection class 1 (=^20 m/s) and EN 20345 S2.

    Technical data
    Leg height 20 cm
    Weight 1) 1,9 kg
    Cut protection class Class 1
    Size 39 - 47

    1) Approx per pair, using size 42

    Versions

    Price

    * Manufacturer's recommended retail price updated as of 2018. 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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