STIHL MS 391 Petrol Chainsaw – 50cm / 20" Bar
The STIHL MS 391 is a high-performance petrol chainsaw designed for demanding applications such as felling, firewood processing, agricultural maintenance, and estate work. Supplied here with a 50cm / 20" guide bar, this version offers increased cutting reach for larger timber while retaining the power and balance needed for professional or heavy-duty domestic use.
With a 64.1cc STIHL 2-MIX engine, the MS 391 combines strong torque and cutting performance with improved fuel efficiency and reduced emissions. Its robust build and durable components are supported by a long-life air filter system, anti-vibration technology, and side chain tensioning for ease of use in the field.
Whether you're clearing windblown trees or processing hardwood, the MS 391 delivers trusted STIHL reliability and versatile performance in a rugged, user-friendly package.
✅ Key Benefits:
Supplied with a 50cm / 20" guide bar – extended reach for large timber and heavy felling
64.1cc 2-MIX petrol engine – powerful, fuel-efficient, and emissions compliant
Long-life air filter – extended service intervals with effective filtration
Anti-vibration system – improved comfort during prolonged use
Side chain tensioner – fast, easy chain adjustments on site
Tool-free fuel/oil caps – quick and convenient refuelling
Ideal for forestry, firewood, and agricultural estate use
🛢️ Fuel Note:
This chainsaw runs on a petrol/oil mix (50:1) using high-quality 2-stroke engine oil. STIHL recommends MotoMix® or E10 unleaded petrol with STIHL HP Ultra oil for optimum engine care.
| Brand | Stihl |
|---|---|
| Weight (kg) | 6.2 |
| Sound pressure level (dB(A)) | 105 |
| Sound power level (dB(A)) | 115 |
| Displacement (cm³) | 64.1 |
| Vibration level left / right (m/s²) | 4.0 / 4.0 |
| STIHL cordless power system | 2-MIX |
| Power output (kW / hp) | 3.3 / 4.5 |
| Bar length (cm / inches) | 50 / 20 |
| Saw chain pitch | 3/8" |
| Drive link gauge (mm) | 1.6 |
| STIHL Oilomatic saw chain type | RM |
| Weight-to-power ratio (kg / kW) | 1.9 |
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