Stihl MS 391 Farm Boss® Chainsaw
Stihl MS 391 Farm Boss® Chainsaw
Petrol Chainsaw 50cm/20'' bar
A manouvrable, high-torque chainsaw for improved performance and user comfort perfect for preparing firewood. Extremely high torque over a wide range of speeds. Up to 20% less fuel consumption and up to 50% reduction in emissions compared to a STIHL 2-stroke engine of the same power output without 2-MIX technology.
STIHL anti-vibration system
Intense vibration at the handles of power tools can lead to longer-term effects of blood vessels in the hands and arms. STIHL have therefore developed an effective anti-vibration system where by the oscillations from the machines 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 - 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.
Controlled-delivery oil pump
The exact chain oil output can be adjusted manually for varying conditions, allowing for a reduction of up to 50%.
Decompression valve
The decompression valve is part of the easy start-system. The valve should be pressed before starting in order to reduce the compression pressure when starting, as well as the effort needed to pull the starter rope. The decompression valve is semi-automatic, meaning that it must be pressed manually before starting, but then closes automatically.
Pre-separation air filtration system
The innovative long-life air filter system greatly extends the service life of the filter - air routing removes larger particles of dirt, meaning the actual filter has less to do so the saw can be used for longer without having to clean the filter.
Advanced combustion technology
Four overflow channels swirl the fuel-air mix before ignition, allowing for optimum combustion and highly efficient performance. The result: lower consumption and high torque across a broad rpm range.
