MS 391 FarmBoss®

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.

• FUNCTION 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	$172.00*	Save and compare
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• 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	--.--**	Save and compare
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• 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	$51.90*	Save and compare
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• 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.

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

  Versions	Price
  3/8" Rapid Micro (RM), 1,6 mm, 50 cm	--.--**	Save and compare
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• 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	$89.95*	Save and compare
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• 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	$51.90*	Save and compare
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• 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*	Save and compare
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• 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
  50cm/20" 1,6mm/0.063" 3/8"	$90.00*	Save and compare
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• 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	--.--**	Save and compare
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• Filing Vice - L 700

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

  Versions	Price
  Stump Vice - S 260 - Small	$37.30*	Save and compare
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• Filing Kit

  The complete Kit for saw chain maintenance.

  Versions	Price
  File Kit - 3/8	$42.30*	Save and compare
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• 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	$17.95*	Save and compare
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