Stihl MS 500i chainsaw - 25" 3/8" bar - professional - felling
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Stihl MS 500i chainsaw - 25" 3/8" bar - professional - felling
The Stihl MS 500i is a latest-generation professional chainsaw with electronic fuel injection, designed for demanding felling and forestry work on large diameters, guaranteeing high performance and immediate response.
Three Main Advantages
Innovative electronic injection: ensures lightning-fast acceleration and optimal engine management without manual adjustments.
High performance on large diameters: ideal for demanding felling and deep cuts.
Constant power: maintains high performance even under stress and in difficult conditions.
Stihl MS 500i chainsaw - 25" 3/8" bar - professional - felling
The STIHL MS 500i chainsaw is ideal for forestry work. Its high power and easy handling allow for effective work with large logs. Thanks to its lightweight design and dynamic handling, the chainsaw is excellent not only for felling and cutting, but also for limbing.
The MS 500i is the world's first chainsaw with electronic fuel injection. Innovative STIHL Injection technology ensures optimal engine performance and excellent starting regardless of altitude and ambient temperature. Sensors measure air pressure, interior and exterior temperatures, and transmit this information to the control unit. Using these values, the control unit can optimally determine the fuel quantity and ignition timing. This ensures fuel metering by opening and closing the valve. STIHL Injection offers rapid acceleration with extremely high performance and low weight:
- The chain accelerates from 0 km/h to 100 km/h in 0.25 seconds.
- The MS 500i achieves the best power-to-weight ratio on the market: a unique 1.24 kg/kW.
- Electronic fuel injection takes place in the proven STIHL 2-MIX engine, which delivers high performance with low fuel consumption. To reduce muscle and joint fatigue, the chainsaw is equipped with STIHL ElastoStart. The HD2 air filter, captive nuts on the sprocket cover, adjustable oil pump, tool-free fuel cap, and lateral chain tensioning complete the high-quality features.

EASY AND SAFE TENSIONING. The lateral chain tensioner allows for quick, easy, and safe chain tensioning and replacement. The tensioning screw is operated from the side through the sprocket cover.
HIGH PERFORMANCE AND COMPACT DESIGN. The electronic injection system's control unit constantly calculates the correct fuel supply and ideal ignition timing, while injection occurs directly into the crankcase via the injector. Sensors measure air pressure, internal and external temperatures and transmit the information to the control unit. The latter is able to optimally determine the fuel quantity and ignition timing using the measured values. This allows the tool to deliver more power while maintaining a weight and size comparable to those of non-injected engines.

QUICK AND EASY OPENING AND CLOSING. Thanks to the tool-free opening and closing cap, the oil and fuel tanks can be opened and closed in just a few simple steps thanks to the bayonet closure.
REDUCED OIL CONSUMPTION. The STIHL Ematic system consists of the STIHL Ematic or Ematic S guide bar and the STIHL Oilomatic chain. It ensures that the chain oil reaches where it's needed for lubrication. This can reduce oil consumption by up to 50%. If you often work in dusty environments or use longer guide bars, the new oil pump system allows you to quickly and easily increase the amount of oil at any time.
EFFORTLESS STARTING. The decompression valve makes starting the device easier. During starting, some of the compressed mixture can be released from the cylinder by opening the valve. This protects the starting system and reduces the force required on the starter cord.
EXTREMELY ENERGY-EFFICIENT. The STIHL 2-Mix engine not only reduces exhaust emissions, but also fuel consumption and the resulting operating costs. This 2-stroke engine requires little maintenance and uses fuel efficiently even at high performance. The fuel is a mixture of gasoline and engine oil. The STIHL 2-Mix engine complies with the stringent European Stage V emissions directive.
Technical data
- CO2
- 706 g/kWh
- Displacement
- 79.2 cm³
- Power
- 5 kW
- Power
- 6.80 HP
- Power-to-weight ratio
- 1.24 kg/kW
- Length of the bar
- 63 cm
- Groove length
- 1.60 mm
- Chain pitch
- 3/8"
- Unit weight without fuel
- 6.3 kg
- System weight without fuel
- 7.88 kg
- Length of the device with claw stop
- 468 mm
- Sound pressure level
- 106 dB(A)
- Sound power level
- 117 dB(A)
- Left vibration value
- 4.2 m/ s²
- Right vibration value
- 4 m/ s²
Fabrizio's usage tips and suggestions
The Stihl MS 500i with a 25" bar and 3/8" chain is a top-of-the-line professional chainsaw, designed for demanding felling and forestry work on large diameters. It is the first chainsaw with electronic fuel injection, designed to offer lightning-fast acceleration and consistent performance.
🔸 Always check the chain before starting: With such a powerful machine, it is essential to have a sharp and well-tensioned chain to work safely and get the most out of it.
🔸 Enjoy acceleration but with control: The engine response is immediate thanks to the electronic fuel injection. Always start decisively but without sudden jerks, especially on the first turns.
🔸 Ideal for large diameters: The 25" bar is perfect for large fellings. Work with technique and always plan the cut, especially on large plants.
🔸 Always check the lubrication: With long and demanding cuts, make sure the chain is always well oiled to avoid overheating.
In short, the Stihl MS 500i is an extremely powerful, innovative and responsive professional chainsaw, perfect for large-scale felling and intensive work where top-level performance is required.
We always check the product before shipping, so we can be sure that it reaches you ready to use and in perfect working order.
For any technical information or usage suggestions, please contact us : we're always ready to advise you on the best options for your field work. You'll be thrilled!
Greetings from Masera
Questions & Answers Stihl MS 500i Chainsaw - 25" 3/8" Bar - Professional - Felling
What type of work is the MS 500i suitable for?
It is designed for professional felling and cutting of large diameters, ideal for intensive forestry work.
What does it mean that it has electronic injection?
It is the first chainsaw with this system: it automatically manages the fuel supply without a carburetor, improving response and performance.
Is this a heavy chainsaw to use?
It is well balanced for its category, but remains a powerful machine designed for experienced operators.
What type of chain does it have?
Fits 3/8" pitch chain, ideal for fast, deep cuts on large wood.
Is it also suitable for non-professionals?
It can also be used by non-professional expert users, but it is a powerful machine and requires good practice and attention
What maintenance does it require?
Regular cleaning of the air filter, chain check, lubrication and general checks to maintain high performance over time.


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