First ever chainsaw with STIHL Injection Technology. The best power-to-weight ratio on the market, and the simplest operation. Ideally suited to arboriculture and harvesting and processing large timber. All thanks to its unique lightweight design and outstanding acceleration. New bumper spikes, HD2 filter, captive nut on the sprocket cover for easy chain change, controlled-delivery oil pump, and tool-free fuel cap for safe and easy filling with fuels and lubricants. STIHL Injection (i)STIHL injection technology enables the MS 500i to achieve extremely high performance with extraordinarily low displacement and low weight. The saw uses innovative technology to achieve rapid acceleration from 0 to 100 km/h in an unbelievable 0.25 seconds. The powerful saw is ready to use right away. Sensors measure air pressure and internal and external temperature, and pass information on to the control unit. This can use the identified values to determine the optimum fuel quantity and ignition timing.Best power-to-weight ratioIts revolutionary chainsaw engine technology, and resulting intelligent lightweight construction result in the best power-to-weight ratio on the market. The optimised design – with lightweight sprocket cover, more compact engine unit, flywheel with a low design height, and a reduced-weight crankshaft adapted to the low weight of the flywheel – makes work significantly more comfortable. The MS 500i is ideal for heavy timber felling, cutting into lengths, and pruning.Decompression valveThe 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.Sensor-controlled fuel meteringIn addition to the external temperature sensor, the MS 500i also has a pressure and internal temperature sensor in its engine. This measures the environmental pressure on start-up, and during operation it checks the engine temperature and pressure in the crankcase. The electrical voltage generator delivers the required speed information. The control unit processes these values, meaning that the system adapts to the conditions of use. The fuel is then dosed at the optimum level, quickly resulting in perfect running characteristics.Very easy to start, whether starting from cold orThe starting process is perfect, with no need for a start position, and easy access to the purger.STIHL 2-MIX-Engine1-in-4 channel technology. The economical STIHL 2-MIX engine with 1-in-4channel technology features a high torque over a wide speed range. The chainsaw provides fuel savings of up to 20% compared to STIHL two-stroke engines in the same performance class without 2-MIX technology. Exhaust emissions are reduced by up to 50%.Anti-vibration systemIntense 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.HD2 filter with radial sealThe new HD2 air filter, made from PET material and featuring a radial seal, prevents the intake of fine dust particles. The hermetic seal increases the service life of the engine and reduces wear.Captive nutsWhen changing the cutting attachment, you will not risk losing the nuts on the sprocket. The MS 261 is the first STIHL chainsaw to be equipped with the captive nuts. A great advantage for all users.Plunge guideMarking has been added to the fan housing to assist with plunge cuts. This ensures better directional control and safe use of the machine during plunge cutting.Optimised bumper spikesThe tooth length of the bumper spikes has been adjusted to account for the radial contours of trees. The saw bites into wood even better when cutting lengths and felling.Side chain tensionerThe tensioning screw can be found on the side of the chain saw through the sprocket cover. This removes the need for contact with the sharp saw chain.STIHL ElastoStartSTIHL ElastoStart reduces the shock caused by the compression of the engine during starting. The compression shock is taken away from the user's joints and muscles through a spring or rubber element in the starter handle.Tool free filler capsSpecial catches on the fuel and oil tanks for easy opening and locking without the need for tools.Optimised sprocket coverThe flatter, narrower sprocket cover with integrated slide rails reduces effort when pruning and ensures outstanding chip removal.STIHL Ematic with new oil pump systemThe new oil pump system allows a higher volume of oil to be delivered. This is especially useful in dusty conditions or when using a long guide bar.
MS 500i Powerful chainsaw with electronically controlled fuel injection
Displacement cm³ 79.2 Power output kW/bhp 5/6.8 Weight kg 1) 6.2 System weight kg 2) 7.47 / 7.78 Power-to-weight ratio kg/kW 1.2 Sound pressure level dB(A) 3) 106 Sound power level dB(A) 3) 119 Vibration values left/right m/s² 4) 4.2/4 Oil pump Adjustable Tank volume l 0.78 Chain pitch 3/8" Chain tensioning Side chain tensioner Sprocket - number of teeth 7 Filter Cartridge filter HD2 Bumper spike Steel spike Cylinder 4 channel / chrome Oil tank volume cm3 325 Sprocket Rim sprocket Anti vibration system Full AV-System Filler cap Tool-free tank cap Starting system ElastoStart / manual fuel pump (purger) / non-return ignition / decompression valve / stop button EPA Certified fuel consumption l/h 2.707 CO2 g/kWh 707