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MS 391 Petrol Chainsaw
SKU: Stihl | MS-1140 200 0747
- Regular price
- £706.21 Ex VAT
- £847.45 Inc VAT
- RRP: £815.84 Ex VAT
- Sale price
- £706.21 £706.21 Ex VAT
- Regular price
-
- £847.45 £847.45 Inc VAT
Free Delivery Over £75 *
Worldwide Shipping from the UK
Trusted UK Arborist Retailer
30-Day Easy Returns
STIHL Approved Dealer
As a STIHL Approved Dealer, we supply genuine UK-spec machines with full manufacturer warranty, professional preparation, and expert aftersales support.
Product information & specifications
STIHL MS 391 Petrol Chainsaw – High-Torque Farm and Estate Saw
Free Spare Chain Available
Worth £20–£40 depending on model
When you add this STIHL chainsaw to your cart, your free matching chain will appear automatically. Simply click "Add Free Item" in the cart to include it with your order.
- Matching chain for this model
- Ideal for quick swaps on the job
- Helps reduce downtime
Your free chain will appear in the cart — just click "Add Free Item" before checkout.
The STIHL MS 391 is a high-torque petrol chainsaw built for demanding agricultural, estate and firewood work. A 64.1cc 2-MIX engine delivers 3.3 kW (4.5 hp) at 6.3 kg without bar and chain, with bar lengths from 35–50 cm (14–20"). The 2-MIX engine delivers strong torque across a wide rev range with lower fuel consumption and reduced emissions compared to conventional 2-stroke designs — ideal for users who need a capable ground saw for regular heavy-duty cutting. In stock at Gustharts as an authorised STIHL dealer, with free UK delivery over £75.
Key Features
- 64.1cc 2-MIX Engine, 3.3 kW – Strong torque for firewood processing, larger timber and sustained farm cutting work.
- 6.3 kg Without Bar and Chain – Well-balanced for a 64cc saw; manageable for extended ground-based use.
- 35–50 cm Bar Compatibility – Covers farm and estate applications from fencing and hedge clearance through to firewood logs and windblown timber.
- Controlled-Delivery Oil Pump with Ematic System – Reduces chain oil consumption while maintaining reliable bar and chain lubrication.
- Long-Life Air Filter System – Pre-separation and HD2 filter for extended service intervals in dusty field conditions.
- Compensator Carburettor – Maintains consistent engine performance as the air filter loads between cleanings.
- Manual Decompression Valve – Reduces pull effort for easier cold and hot starts.
- Side-Mounted Chain Tensioning – Tool-free chain adjustments on site.
- STIHL Anti-Vibration System – Reduces hand-arm vibration for comfort during longer cutting sessions.
- Tool-Free Fuel and Oil Caps – Fast refuelling without tools in the field.
Technical Specifications
Why Choose the STIHL MS 391?
The MS 391 sits above the MS 271 and MS 291 in the STIHL farm and estate range, offering more displacement and torque for users who regularly tackle larger-diameter timber, heavy firewood volumes or sustained daily cutting work. It is not an M-Tronic saw — the compensator carburettor handles filter loading well but does require periodic manual carburettor checks for altitude or fuel changes. For farm and estate users who want reliable heavy-duty performance without stepping into the full professional forestry range, the MS 391 is the natural ceiling in this category.
Complete Your Kit
- Replacement Chainsaw Chains – .325" RS Pro chains compatible with the MS 391
- Chainsaw Guide Bars – 35–50 cm bars for this model
- 2-Stroke Oil and Fuel – STIHL HP Ultra and MotoMix for 2-MIX engines
- Chain Sharpening Tools – filing kits for .325" chain maintenance
- Chainsaw PPE – trousers, helmet, gloves and boots for compliant ground-based cutting
FAQs
How does the MS 391 compare to the MS 291?
The MS 391 is larger at 64.1cc and 3.3 kW versus the MS 291 at 55.5cc and 2.8 kW. It delivers more torque for larger-diameter timber and heavier firewood work, at the trade-off of slightly more weight at 6.3 kg versus 5.6 kg.
What bar lengths are compatible with the MS 391?
STIHL recommend 35–50 cm (14–20") guide bars using .325" RS Pro chain. Gustharts stocks compatible options.
Does the MS 391 have M-Tronic?
No — the MS 391 uses a compensator carburettor rather than M-Tronic electronic engine management. Manual carburettor adjustment may be needed for significant altitude or fuel quality changes.
Is the MS 391 suitable for chainsaw milling?
It can be used with smaller Alaskan mill setups at the shorter end of its bar range, but for serious milling the MS 462 C-M or MS 500i are better matched for sustained load.
Is the MS 391 suitable for homeowners?
It is a heavy-duty ground saw best suited to farm, estate and professional users with regular cutting demands. For occasional domestic firewood use, the MS 271 or MSA 200 C-B are more appropriate.
Specification
| Bar length | 45-50 cm |
| Bar length | 18-20 " |
| Displacement | 64.1 cm³ |
| Power output | 3.3/4.5 kW/HP |
| Weight | 6.2 kg 1) |
| Power-to-weight ratio | 1.9 kg/kW |
| Weight | 7.33 / 7.45 kg 2) |
| Length with bumper strike | 458 mm |
| Sound pressure level | 105 dB(A) 3) |
| Sound power level | 117 dB(A) 3) |
| Vibration values left/right | 4/4 m/s² 4) |
| Saw chain pitch | 3/8 " |
| CO2 | 653 g/kWh |
1)Without fuel, without bar and chain2)Without fuel, with bar and chain3)K-factor according to DIR 2006/42/EC = 2.5 dB (A)4)K-factor according to DIR 2006/42/EC = 2m / s ²
STIHL MS 391 Petrol Chainsaw – High-Torque Farm and Estate Saw
Free Spare Chain Available
Worth £20–£40 depending on model
When you add this STIHL chainsaw to your cart, your free matching chain will appear automatically. Simply click "Add Free Item" in the cart to include it with your order.
- Matching chain for this model
- Ideal for quick swaps on the job
- Helps reduce downtime
Your free chain will appear in the cart — just click "Add Free Item" before checkout.
The STIHL MS 391 is a high-torque petrol chainsaw built for demanding agricultural, estate and firewood work. A 64.1cc 2-MIX engine delivers 3.3 kW (4.5 hp) at 6.3 kg without bar and chain, with bar lengths from 35–50 cm (14–20"). The 2-MIX engine delivers strong torque across a wide rev range with lower fuel consumption and reduced emissions compared to conventional 2-stroke designs — ideal for users who need a capable ground saw for regular heavy-duty cutting. In stock at Gustharts as an authorised STIHL dealer, with free UK delivery over £75.
Key Features
- 64.1cc 2-MIX Engine, 3.3 kW – Strong torque for firewood processing, larger timber and sustained farm cutting work.
- 6.3 kg Without Bar and Chain – Well-balanced for a 64cc saw; manageable for extended ground-based use.
- 35–50 cm Bar Compatibility – Covers farm and estate applications from fencing and hedge clearance through to firewood logs and windblown timber.
- Controlled-Delivery Oil Pump with Ematic System – Reduces chain oil consumption while maintaining reliable bar and chain lubrication.
- Long-Life Air Filter System – Pre-separation and HD2 filter for extended service intervals in dusty field conditions.
- Compensator Carburettor – Maintains consistent engine performance as the air filter loads between cleanings.
- Manual Decompression Valve – Reduces pull effort for easier cold and hot starts.
- Side-Mounted Chain Tensioning – Tool-free chain adjustments on site.
- STIHL Anti-Vibration System – Reduces hand-arm vibration for comfort during longer cutting sessions.
- Tool-Free Fuel and Oil Caps – Fast refuelling without tools in the field.
Technical Specifications
Why Choose the STIHL MS 391?
The MS 391 sits above the MS 271 and MS 291 in the STIHL farm and estate range, offering more displacement and torque for users who regularly tackle larger-diameter timber, heavy firewood volumes or sustained daily cutting work. It is not an M-Tronic saw — the compensator carburettor handles filter loading well but does require periodic manual carburettor checks for altitude or fuel changes. For farm and estate users who want reliable heavy-duty performance without stepping into the full professional forestry range, the MS 391 is the natural ceiling in this category.
Complete Your Kit
- Replacement Chainsaw Chains – .325" RS Pro chains compatible with the MS 391
- Chainsaw Guide Bars – 35–50 cm bars for this model
- 2-Stroke Oil and Fuel – STIHL HP Ultra and MotoMix for 2-MIX engines
- Chain Sharpening Tools – filing kits for .325" chain maintenance
- Chainsaw PPE – trousers, helmet, gloves and boots for compliant ground-based cutting
FAQs
How does the MS 391 compare to the MS 291?
The MS 391 is larger at 64.1cc and 3.3 kW versus the MS 291 at 55.5cc and 2.8 kW. It delivers more torque for larger-diameter timber and heavier firewood work, at the trade-off of slightly more weight at 6.3 kg versus 5.6 kg.
What bar lengths are compatible with the MS 391?
STIHL recommend 35–50 cm (14–20") guide bars using .325" RS Pro chain. Gustharts stocks compatible options.
Does the MS 391 have M-Tronic?
No — the MS 391 uses a compensator carburettor rather than M-Tronic electronic engine management. Manual carburettor adjustment may be needed for significant altitude or fuel quality changes.
Is the MS 391 suitable for chainsaw milling?
It can be used with smaller Alaskan mill setups at the shorter end of its bar range, but for serious milling the MS 462 C-M or MS 500i are better matched for sustained load.
Is the MS 391 suitable for homeowners?
It is a heavy-duty ground saw best suited to farm, estate and professional users with regular cutting demands. For occasional domestic firewood use, the MS 271 or MSA 200 C-B are more appropriate.
Specification
| Bar length | 45-50 cm |
| Bar length | 18-20 " |
| Displacement | 64.1 cm³ |
| Power output | 3.3/4.5 kW/HP |
| Weight | 6.2 kg 1) |
| Power-to-weight ratio | 1.9 kg/kW |
| Weight | 7.33 / 7.45 kg 2) |
| Length with bumper strike | 458 mm |
| Sound pressure level | 105 dB(A) 3) |
| Sound power level | 117 dB(A) 3) |
| Vibration values left/right | 4/4 m/s² 4) |
| Saw chain pitch | 3/8 " |
| CO2 | 653 g/kWh |
1)Without fuel, without bar and chain2)Without fuel, with bar and chain3)K-factor according to DIR 2006/42/EC = 2.5 dB (A)4)K-factor according to DIR 2006/42/EC = 2m / s ²
STIHL Warranty
STIHL offer a 1 year professional warranty or 2 year domestic warranty with all of their machines.
The following exceptions apply:
- AK System, AS System and AI Line cordless products aren't covered under warranty when used by professionals
- AP System machines, batteries and chargers - 2 year professional warranty
- Pressure washers - 2 year professional warranty or 3 year domestic warranty
- Mowers, tillers, shredders, scarifiers & iMOW machines - See STIHL's website here
Extend your Stihl warranty by an additional year when purchasing a STIHL Smart Connector with selected machinery from the petrol and cordless range. Extends your petrol warranty from 1 to 2 years AND 2 to 3 years on select cordless tools.
STIHL offer a 1 year professional warranty or 2 year domestic warranty with all of their machines.
The following exceptions apply:
- AK System, AS System and AI Line cordless products aren't covered under warranty when used by professionals
- AP System machines, batteries and chargers - 2 year professional warranty
- Pressure washers - 2 year professional warranty or 3 year domestic warranty
- Mowers, tillers, shredders, scarifiers & iMOW machines - See STIHL's website here
Extend your Stihl warranty by an additional year when purchasing a STIHL Smart Connector with selected machinery from the petrol and cordless range. Extends your petrol warranty from 1 to 2 years AND 2 to 3 years on select cordless tools.
Delivery & Returns
UK Delivery
Fast, reliable delivery from our UK warehouse.
- Free UK delivery on eligible orders over £75 +VAT. Long, heavy or oversized items may incur an additional delivery charge, shown at checkout.
- UK Standard Delivery from £3.60 + VAT
Estimated delivery: 2–4 working days - Next Working Day Delivery – £6.00 + VAT
Order before 3:00pm (Monday–Friday) for next working day delivery
All UK orders are dispatched Monday–Friday and sent via a tracked courier service.
International Delivery
We ship worldwide from the UK.
- Europe from £10.00
Estimated delivery: 2–7 working days - Rest of the World from £12.00
Estimated delivery: 2–11 working days
Shipping costs and delivery times are calculated at checkout based on destination and order contents.
Customs, Duties & Taxes
International orders may be subject to local import duties, taxes, or customs charges.
When UPS is selected at checkout, applicable duties and taxes are included in the total price. For other shipping services, duties and taxes may be charged separately on delivery and are the responsibility of the recipient.
Customs processing times may affect delivery estimates.
Returns
30-Day Return Policy
- Items can be returned within 30 days of delivery
- Products must be unused and in original condition
- Return postage costs apply unless the item is faulty or incorrect
For full details, please visit our Shipping & Returns page.
UK Delivery
Fast, reliable delivery from our UK warehouse.
- Free UK delivery on eligible orders over £75 +VAT. Long, heavy or oversized items may incur an additional delivery charge, shown at checkout.
- UK Standard Delivery from £3.60 + VAT
Estimated delivery: 2–4 working days - Next Working Day Delivery – £6.00 + VAT
Order before 3:00pm (Monday–Friday) for next working day delivery
All UK orders are dispatched Monday–Friday and sent via a tracked courier service.
International Delivery
We ship worldwide from the UK.
- Europe from £10.00
Estimated delivery: 2–7 working days - Rest of the World from £12.00
Estimated delivery: 2–11 working days
Shipping costs and delivery times are calculated at checkout based on destination and order contents.
Customs, Duties & Taxes
International orders may be subject to local import duties, taxes, or customs charges.
When UPS is selected at checkout, applicable duties and taxes are included in the total price. For other shipping services, duties and taxes may be charged separately on delivery and are the responsibility of the recipient.
Customs processing times may affect delivery estimates.
Returns
30-Day Return Policy
- Items can be returned within 30 days of delivery
- Products must be unused and in original condition
- Return postage costs apply unless the item is faulty or incorrect
For full details, please visit our Shipping & Returns page.
