MS 390 - All purpose 3.4kW-Petrol chainsaw

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.

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.

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.

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 up to 50%.

The chain brake on your STIHL chainsaw can be triggered automatically or manually. In both cases, the brake band encloses the clutch drum and prevents the chain starting to move even when the throttle trigger is squeezed. The chain brake is applied manually by pressing the front hand guard on your STIHL chainsaw forwards. It is activated automatically whenever a sufficiently strong kickback is encountered.

The tensioning screw reachable on the side of chainsaw through the sprocket cover. This removes the need for contact with the sharp saw chain.

All important functions such as start, choke, throttle and stop are operated via a single lever.

Special catches on the fuel and oil tanks for easy opening and locking without the need for tools.

The excact chain oil output can be adjusted maunally for varying conditions, allowing for a reduction of up to 50%.

STIHL ElastoStart reduces the shock caused by the compression of the engine during starting. The compression shock is taken away from the users joints and muscles through a spring or rubber element in the starter handle.