The MS 881 Petrol Chainsaw is the world's most powerful production chainsaw, built for high-performance work. A direct replacement for the MS 880, it features the highest displacement (121.6 cc) and engine power (6.4 kW), making it the optimum choice for professional foresters and loggers. Ideal for the most demanding forestry jobs, this chainsaw is excellent for working in extreme conditions when harvesting big timber. It can also be fitted to a saw frame. Fitted with a 2-MIX engine to comply with EU5 emission regulations and an HD2 filter to ensure long service life.
 
The STIHL anti-vibration system reduces the transmission of engine vibrations to the handle area, making the tool more comfortable to hold and reducing fatigue during extended use. The decompression valve allows compressed mixture to escape from the cylinder when starting, protecting the start-up system and reducing the force required on the starter cord. The HD2 filter is made from polyethylene material with up to 70% finer pores than fleece and polyamide filters to trap even very fine dust. It is oil and water-repellent, making it easy to clean.
 
The compensator system in the carburetor ensures that engine performance, exhaust gas quality, and fuel consumption remain virtually constant over a long period, even as the air filter becomes dirty, reducing the need for frequent maintenance. The variable-displacement oil pump allows precise, demand-based oil delivery, reducing oil production by up to 50% in the E position, while providing additional volume when needed for long cutting attachments or dry wood.
 
Side-mounted chain tensioning allows for quick and secure re-tensioning, with the tensioning screw inserted laterally through the sprocket cover. The STIHL Ematic system ensures efficient lubrication of the chain, reducing oil consumption by up to 50%. By switching from summer to winter operation, the intake air is pre-heated over the engine fins, preventing carburetor icing and allowing continued operation in freezing temperatures. The tool-free fuel cap makes refueling and oiling quick and easy with a bayonet closure.