Stihl MS 391 Petrol Chainsaw 20"

£758.00
  • Compensator (constant engine power)
  • Single-level master control (start, choke, throttle, and stop)
  • Anti-vibration system (improved comfort and reduced injury risk)
  • Tool-free filler caps
  • Variable-displacement oil pump (precise, demand-based delivery of oil)

Product Description

The STIHL MS 391 is a high torque petrol chainsaw designed for heavy agricultural use. Its impressive performance is ideal for harvesting large quantities of wood or sawing firewood.

The machine’s high torque comes from its advanced combustion technology, which incorporates four overflow channels that swirl the fuel-air mix before ignition, resulting in high levels of torque as well as reduced fuel consumption.

Performance is further enhanced by the MS 391’s innovative compensator, which generates constant engine power, while ensuring reliability for the toughest cutting jobs.

The 4.5 bph STIHL 2-MIX engine also produces up to 50% lower emissions and around 20% lower fuel consumption compared to non-2-MIX technology, making this chainsaw powerful, economical, and friendlier to the environment.

Finally, the MS 391 is comfortable and easy to use due to its simple maintenance, single-lever master control, user-friendly grips, and tool-free filler caps.

STIHL chainsaws are renowned across the world for their reliability and excellent performance. That’s why this MS 391 petrol chainsaw features:

  • Advanced combustion technology (higher torque and lower fuel consumption)
  • An economical and low-emission STIHL 2-MIX engine
  • Compensator (constant engine power)
  • Single-level master control (start, choke, throttle, and stop)
  • Side chain tensioner (removes need to come into contact with the chain)
  • Anti-vibration system (improved comfort and reduced injury risk)
  • Pre-separation air filtration system (longer filter life)
  • Ematic chain lubrication system (lowers oil consumption by up to 50%)
  • Tool-free filler caps
  • Variable-displacement oil pump (precise, demand-based delivery of oil)
  • Decompression valve (easy starting)

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.

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

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 broad rpm range.

Technical Specs

  • CO² 755 g/kWh
  • Item Weight 6.2 kg
  • Tank Volume 0.60 l
  • Bar Length 40-50 cm
  • Displacement 64.1 cm
  • Sound Pressure Level 105 dB(A)
  • Vibration Value (Left/Right) 4/4 m/s2
  • EPA Certified Fuel Consumption 1.779 l/h

Features in depth

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.

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.

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

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

Side chain tensioner

You can tension the chain quickly with the easily accessible chain tensioner on the side of the machine.

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%.

Stihl MS 391 Petrol Chainsaw 20"

£758.00
  • Compensator (constant engine power)
  • Single-level master control (start, choke, throttle, and stop)
  • Anti-vibration system (improved comfort and reduced injury risk)
  • Tool-free filler caps
  • Variable-displacement oil pump (precise, demand-based delivery of oil)