STIHL MS 391 18-20″ Petrol Chainsaw

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In Stock
  • Home Delivery
  • Aftercare Package
  • Finance Available
Highlights:
  • 64.1 cc
  • 4.5 hp / 3.3 kW
  • 6.4 kg
  • 3/8″ Chain
  • 2 Mix Engine
  • Decompression valve
  • Home Delivery
  • Aftercare Package
  • Finance Available
SKU: N/A Category: Brand:
Description

Stihl MS 391 Petrol Chainsaw

Professional-level petrol chainsaw built for heavy woodcutting and demanding use with powerful performance, efficiency, and comfortable handling. Designed to be a reliable workhorse for harvesting timber, processing large volumes of firewood, and everyday agricultural or forestry tasks.

Overview

• High-torque 64.1 cm³ STIHL 2-MIX engine delivering strong power and efficient performance with up to 20 % lower fuel consumption and 50 % reduced emissions compared with previous models.
• Designed for consistent cutting performance across a range of speeds, ensuring smooth and effective operation in tough conditions.
• Ideal choice for serious landowners, farmers, forestry workers and anyone needing a rugged saw for heavy-duty tasks.

Key Features:

• Advanced STIHL 2-MIX engine for powerful cutting and fuel efficiency
• Ematic chain lubrication system significantly reduces oil consumption and delivers lubrication where it’s needed most
• Side-mounted chain tensioning for quick, tool-free adjustments
• Variable-displacement oil pump to tailor lubrication to conditions
• Anti-vibration system for reduced fatigue during long cutting sessions
• Tool-free fuel and oil caps for fast refuelling
• Compensator system maintains power and performance even as the air filter gets dirty
• Manual decompression for easier starting

Strong, reliable and easy to operate, this chainsaw suits a range of woodcutting tasks from felling medium-sized trees to cutting firewood or timber processing. Its ergonomic design and efficient lubrication systems make extended jobs more manageable and cost-effective.

Additional information
Machine Power Type

Petrol

Machine Class

Domestic, Professional

Machine Category

Chainsaws

Options

Tool Only NO Bar & Chain, 16" Bar & Chain, 18" Bar & Chain, 20" Bar & Chain

Chainsaw Bar Size

,

Technical Info

Technical Info

Technical dataValue
Displacement cm³64.1
Power output kW/bhp3.3/4.5
Weight kg 1)6.2
System weight kg 2)7.28 / 7.51 / 7.68
Power-to-weight ratio kg/kW1.9
Sound pressure level dB(A) 3)105
Sound power level dB(A) 3)117
Vibration values left/right m/s² 4)4/4
STIHL Oilomatic saw chain pitch/type3/8″ RM
Oil pumpNot adjustable
Tank volume l0.60
Chain pitch3/8″
Chain tensioningSide chain tension
Sprocket – number of teeth7
FilterRound cartridge filter
Bumper spikeSteel claw
CylinderChrome
Oil tank volume cm3350
SprocketSprocket profile
Anti vibration systemStandard AV-System
Filler capTools
EPA Certified fuel consumption l/h1.779
CO2 g/kWh755
Speed at maximum power Um9.500
EPA Certified fuel consumption glh0.47
Warranty

Warranty

STIHL AS System, AI Line and AK System cordless products are not covered under warranty when used by Professional Users (including Hire, Rental and Construction Industry, Farm and Estate).

* Subject to product registration and annual servicing (otherwise 2 years)
** Whole handlebar mechanism

Further info available here: https://www.stihl.co.uk/stihl-warranty-policy.aspx

Product TypeYears DomesticYears Professional
Standard21
All batteries and chargers for cordless products shown in the current STIHL Sales Catalogue21
STIHL High Pressure Cleaners32
Extension of Domestic warranty from 2 to 3 years when purchased with 5 litres of MotoMix. Domestic customers can now extend warranty cover of selected machines, when purchased along with 5L of MotoMix.2 to 3
Ignition modules – There is a 2 year warranty on ignition modules.2
Spare Parts11
2, 3, 4, 5, 6 and R Series Lawnmowers5*3 Months
R4, T4, T5 & T6 Series Ride-on Mowers5*3 Months
MB 4 RTP, MB 655 RS5*1
7 Series Lawn mowers5*1
Lawn Scarifier5*3 Months
Tillers and Shredders23 Months
Lawn mower Deck 2, 3, 4, 5, 6 & R Series10*3 Months
Mono Handlebar 2, 3, 4, 5, 6 & R Series10**3 Months
Mono Handlebar 7 Series10**5**
iMOW®5*5*
Delivery

Delivery

We offer a free click & collect option for all our products, with a choice of collecting from Dorchester, Tiverton or Chard. Please click here for full address details.

For all non-large items, we also offer national delivery throughout the UK mainland, excluding Scottish Highlands, Islands and Northern Ireland.

For some of our larger products, unfortunately national delivery is not an option. Therefore, we only offer free click & collect or our own delivery service to the following area postcodes; TQ, EX, TA, BS, BA, SP, BH, DT.

The delivery options available and associated costs are determined by the product type/size and customer location, which will be calculated at check-out, before processing your order.

Delivery time scales vary depending on our stock levels, your choice of delivery method and delivery location. Any potential delays will be communicated with yourself as soon as we are aware.

If you have any questions or queries about an order you would like to place with us, please do not hesitate to contact us.

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