Name: STIHL MS 391 Chainsaw 20" Bar
Brand: STIHL
SKU: 1140 200 0741
Price: 969 GBP
Availability: InStock

The STIHL MS 391 Chainsaw is an 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.

Displacement cm³	64.1
Power output kW/bhp	3.3/4.5
Power-to-weight ratio kg/kW	1.9
Weight kg ¹⁾	6.2
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

Additional information

Weight	12 kg
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 a broad rpm range.
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	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	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	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	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	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	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	Special catches on the fuel and oil tanks for easy opening and locking without the need for tools.

Shipping & Delivery

Delivery shall be charged at £8.95 including VAT for all orders up to the value of £99.99. Orders to the value of £100.00 or above shall be subject to free delivery.

There will be no pre-advising of delivery unless your items are unavailable. In which case we will phone or email you to arrange an alternative delivery date or discuss your option to cancel. For orders placed on a weekend we aim to deliver on the following Wednesday with the exception of bank holidays, but this is not guaranteed. Shipping costs and options will be displayed in the cart and checkout pages of our website. For more information see our delivery policy page.

Returns & Refunds

We have a 14-day return policy, which means you have 14 days after receiving your item to request a return, To be eligible for a return, your item must be in the same condition that you received it, unused, and in its original packaging. You’ll also need the order confirmation, order number, or proof of purchase. For more information see our returns policy page.