Stihl MS 391 Petrol Chainsaw
£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
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
£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)