MS 231 PM3 STIHL chainsaw, extremely suitable for cutting firewood 1) No fuel, blade and chain 2) Coefficient K according to Directive 2006/42 / EC = 2.5 dB (A) 3) Coefficient K according to Directive 2006/42 / EC = 2m / s ² Cubic capacity cm³ 42,6 Power kW / HP 2 / 2,7 Weight kg 1) 4,8 Power to weight ratio kg / kW 2,4 Sound pressure level dB (A) 2) 103 Sound power level dB ( A) 2) 114 Vibrations left / right m / s² 3) 3,9 / 3,9 Step / chain type 3/8 "P, 3/8" P Standard Long-lasting air filtration system The long-lasting air filtration system with cyclone separation ensures significantly longer filter life. Its separation cyclone removes large particles of pollutants, so as not to burden the filter, thus doubling the time until the next cleaning. Anti-vibration system In the long run, strong vibrations in the handles of machines can cause problems with the perspiration of the fingers and hands. To prevent this problem, STIHL has developed a high quality anti-vibration system. In machines with anti-vibration system, the transmission to the handles of the oscillations produced by the motor and the component is significantly reduced. Pressure compensator The STIHL pressure compensator, a regulator built into the carburetor, ensures that engine performance, exhaust quality and fuel consumption remain almost constant over an extended period of time, despite progressive air pollution. ErgoStart System Easier to start than ever. In the new ErgoStart system, there is an additional coil spring between the starter pulley and the crankshaft, which compresses against the compression pressure exerted on the piston. When the spring force exceeds the compression pressure, the crankshaft will start to rotate, starting the engine. The machine starts smoothly and comfortably, without annoying fluctuations in the required power. Ematic Chain Lubrication System The STIHL Ematic-System consists of an Ematic blade, an Oilomatic chain and an adjustable or reduced flow oil pump. The special construction of the blade and the chain ensures that every drop of oil reaches where it really needs lubrication. Thus oil consumption can be reduced by up to 50%. Multi-function lever The basic functions of the machine, such as cold and hot start, operation and stop, are controlled by a single lever. This makes handling extremely easy and safe, as the operator does not have to move his right hand away from the handle. Tank cap that opens without tools Special secured plugs for the fuel tank and the oil tank. In machines with such plugs, the tank and the oil tank open and close quickly, with minimal force and without tools. Lateral chain tensioner With the side tensioner, the chain is stretched from the side, through the bell cap. This avoids the contact of the hands with the sharp chain and the support nails of the chainsaw. Carburetor preheating system STIHL chainsaws with carburetor preheating can be relied on even during the colder months of the year: With winter setting, preheated suction air passes around the carburetor. This prevents the carburetor from freezing. A simple move is enough to switch between summer and winter mode. Optional HD2 - New filter New HD2 filter: The new HD2 high density polyethylene filter has 70% thinner pores than nonwoven and polyamide filters, capturing even the finest dust. In addition, it repels water and oil and for this reason it is very easy to clean. The replacement filter is removed and installed without tools.