Chainsaw MS 500i 28" Light

The Stihl MS 500i is in a class by itself — the world's first chainsaw with electronically controlled fuel injection, and still the benchmark for professional-grade performance in a lightweight package. Built exclusively for forestry personnel and tree service professionals, it pairs a 79.2cc engine producing 6.8 hp with an industry-leading 1.24 kg/kW power-to-weight ratio, meaning you get more cutting power per pound than anything else on the market. Stihl Injection technology continuously reads air pressure, engine temperature, and crankcase pressure to optimize fuel delivery and ignition timing automatically — no choke, no start position, no guesswork. The result is a saw that accelerates from idle to full power in 0.25 seconds, starts reliably in any conditions, and runs at peak performance whether you're working at altitude, in extreme heat, or on a long day of heavy timber. If you're putting in the hours, this is the saw built for it.

Features

• Stihl Injection electronically controlled fuel injection system uses pressure and temperature sensors to continuously optimize fuel quantity and ignition timing, delivering rapid acceleration and consistent performance across all operating conditions without a choke or start position.
• 79.2cc engine produces 6.8 hp with a power-to-weight ratio of 1.24 kg/kW — one of the best in the professional chainsaw segment — allowing extended use without the fatigue of a heavier saw.
• ElastoStart starter handle incorporates a built-in shock absorber that reduces peak compression forces during pulling, significantly lowering starting effort on cold and warm starts.
• Decompression valve temporarily reduces combustion chamber compression during cranking, further reducing pull effort needed to start the engine.
• Quickstop chain brake stops chain rotation in fractions of a second when activated by the operator's hand or by inertia during kickback.
• HD2 air filter features a large washable surface area for extended service intervals and high performance in dusty and dry conditions, providing better engine protection than standard filters.
• Ematic lubrication system with high-output adjustable oiler directs oil precisely to the bar and chain, reducing oil consumption by up to 50% while providing optimal lubrication for longer bars and dry conditions.
• Side-access chain tensioner allows quick and convenient chain adjustment with a bar wrench without repositioning the saw.
• Quarter-turn shroud lock on the air filter cover provides fast tool-free access for field servicing with minimal downtime.
• Master Control Lever combines choke, starting throttle lock, and on/off switch into a single intuitive control.
• MDG 1 diagnostic software allows Stihl dealers to rapidly identify service needs, reducing shop time.
• Anti-vibration system uses precisely calculated buffer elements to minimize engine and chain vibration transferred to both handles, reducing operator fatigue during extended use.
• Toolless fuel and oil caps with retainers open and close quickly without tools and stay attached to the unit to prevent loss in the field.
• Compatible guide bar range: 16 in. to 36 in.

Specifications

• Engine displacement: 79.2cc
• Engine power: 6.8 hp (5.0 kW)
• Power-to-weight ratio: 1.24 kg/kW
• Weight (powerhead only): 13.7 lbs. (6.2 kg)
• Bar length: 28 in.
• Chain pitch: 3/8 in.
• Fuel tank capacity: 26.5 oz. (785 ml)
• Oil tank capacity: 11.0 oz. (325 ml)
• Idle speed: 3,000 RPM
• Compatible bar range: 16 in. to 36 in.