MS 500i Petrol Chainsaw: Powerful 5.0 kW chainsaw with electronically controlled fuel injection
STIHL MS 500i: Pioneering chainsaw with fuel injection
The innovative MS 500i chainsaw from STIHL is the world’s first chainsaw with electronically controlled fuel injection. Its agile, performance-optimised engine accelerates very quickly. Thanks to its extremely successful lightweight design, this tool achieves an impressively low power-to-weight ratio of 1.24 kg/kW. This high-torque machine is a powerful solution for use in professionally harvesting large timber.
The MS 500i features a simple start-up sequence as well as very good starting behaviour under all usage conditions. Sensory fuel metering guarantees that the mixture is directly adapted to the oxygen content of the air. Like the MS 462, this saw can be very easily pivoted and – thanks to its new bumper spikes and sprocket cover – can be guided close to tree trunks.
Exterior design of STIHL guide bars are subject to change. Technical specifications remain the same.
Features
The pictures shown are sample photos. The actual appearance of the equipment features and their specific attachment to the product may differ from the pictorial representations, but will have the same functionality.
STIHL INJECTION
HIGH PERFORMANCE IN COMPACT DESIGN. The electronic fuel injection control unit continuously calculates the correct fuel supply and the ideal ignition time, and injection is performed directly into the crankcase via the injection valve. Additionally, 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. This means that your tool offers more power from a similar weight and installation space compared to engines without injection.
MANUAL DECOMPRESSION
EFFORTLESS START-UP. The decompression valve makes it easier to start your tool. When starting, you can allow some of the compressed mixture to escape from the cylinder by opening the valve. This protects the start-up system and reduces the amount of force required on the starter cord.
SENSOR-BASED FUEL MEASUREMENT
FOR OPTIMISED RUNNING CHARACTERISTICS. During work, your chainsaw uses a pressure and temperature sensor on the engine to measure the fuel. The control unit processes the values measured by the sensor so that the system adapts to the operating conditions. The optimised measurement of the fuel also achieves the best possible running behaviour.
SIMPLIFIED START
NO NEED FOR A START POSITION. Thanks to electronic fuel injection, your chainsaw does not need a start position. In addition, the manual fuel pump is easily accessible, making the start-up process even easier.
STIHL 2-MIX ENGINE
HIGHLY POWER-EFFICIENT. With the STIHL 2-MIX engine, you can reduce exhaust emissions and fuel consumption, and therefore operating costs. This 2-stroke engine is low-maintenance and uses fuel efficiently even at high power levels. Use a mixture of petrol and engine oil as fuel. The STIHL 2-MIX engine complies with the strict EU Stage V emissions directive.
STIHL ANTI-VIBRATION SYSTEM
FOR MORE PLEASANT WORK. Vibrations can occur when you put your tools through their paces, and these are particularly noticeable in the grip area. The buffer and spring elements of the STIHL anti-vibration system reduce the transmission of engine vibrations to the handle area and therefore to your body. The result is that your tool is more comfortable to hold and your work is much less tiring.
CAPTIVE NUTS
When changing the cutting attachment, you will not risk losing the nuts on the sprocket.
PLUNGE GUIDE
Marking 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 SPIKES
FOR A FIRM GRIP ON THE TREE. The rounded arrangement of the bumper spike teeth matches the radial contours of trees. This means that your chainsaw will bite even better into the wood when cutting to length and felling.
SIDE-MOUNTED CHAIN TENSIONING
FOR SIMPLE AND SECURE RE-TENSIONING. Side-mounted chain tensioning allows for protected, easy and quick chain tensioning and replacement. The tensioning screw is inserted laterally through the sprocket cover.
TOOL-FREE FUEL CAP FOR OIL AND FUEL TANKS
QUICK AND EASY TO USE. With tool-free fuel cap, you can open and close oil and fuel tanks in just a few simple steps, thanks to a bayonet closure.
OPTIMISED SPROCKET COVER
SAVES YOUR ENERGY. The optimised sprocket cover is narrower and flatter than the previous model. This improvement enables effortless delimbing and excellent chip removal. It has integrated slide rails and a guide edge, making it easier to guide the power tool along the trunk.
STIHL EMATIC SYSTEM
REDUCES OIL CONSUMPTION. The STIHL Ematic system comprises a STIHL Ematic or Ematic S guide bar, a STIHL Oilomatic saw chain and a controlled-delivery oil pump. It ensures that the chain oil gets to where it is needed for lubrication. This allows you to reduce oil consumption by up to 50%. If you often work in dusty conditions or if you use long guide bars, you can quickly and easily increase the oil quantity at any time with the new oil pump system.
Technical details
| Displacement | 79.2 cm³ |
| Power output | 5/6.8 kW/HP |
| CO2 | 706 g/kWh |
| Weight | 6.2 kg 1) |
| Weight | 7.57 / 7.88 kg 2) |
| Bar length | 50-63 cm |
| Power-to-weight ratio | 1.24 kg/kW |
| Bar length | 20-25 ” |
| Saw chain pitch | 3/8 ” |
| Length with bumper strike | 468 mm |
| Sound pressure level | 106 dB(A) 3) |
| Sound power level | 119 dB(A) 3) |
| Vibration values left/right | 4.2/4 m/s² 4) |
1)Without fuel, without bar and chain2)Without fuel, with bar and chain3)K-factor according to DIR 2006/42/EC = 2.5 dB (A)4)K-factor according to DIR 2006/42/EC = 2m / s ²
