The STIHL MS 500i R is revolutionary for professional users. 

It was the first chainsaw on the worldwide market with a wrap-handle design and electronically controlled fuel injection. An excellent power-to-weight ratio and ergonomic design make this saw a versatile tool for felling, bucking, or delimbing operations in multiple positions.

FEATURES

• MS-Wrap Handle (R) - Saw can be used in multiple positions for felling or limbing with hands in the proper positions.
• Sensor-Controlled Fuel Metering - Sensor-controlled fuel metering delivers the right amount of fuel.
• Extended Chip Deflector on Sprocket Cover - The deflector helps to route chips, dust, and debris downward and away from the operator.
• Quick Acceleration - Quick acceleration helps deliver excellent cutting performance.
• New Generation MDG 1 Diagnostic Software - This product's diagnostic software allows dealers to quickly identify what service might be needed.
• Quarter Turn Lock on the Air Filter Shroud - The quarter-turn shroud lock provides quick access, so users can quickly and efficiently service the chain saw with minimal down time on the job.
• Simplified Starting Procedure - Saves the user time and reduces the chance of flooding the engine when starting.
• HD2 Air Filter - The HD2 air filter on this unit is washable, providing extremely long filter life and lowering maintenance costs. The large surface area allows for longer run times between cleanings and high performance even while operating in dusty and dry conditions. 
• High Power-to-Weight Ratio - This feature allows users to get more done by minimizing fatigue.
• STIHL ElastoStart™ - The ElastoStart™ starter handle is an exclusive feature of STIHL. It is a starting grip with a built-in shock absorber that helps reduce the effort when pulling on the starter cord. The ElastoStart™ starter grip noticeably reduces the sudden peak forces (compression) normally felt during cranking. The forces which occur at the grip after the first compression stroke are smoothed out.
• Ematic™ Lubrication System - The Ematic™ guide bar, when used with STIHL OILOMATIC® saw chain, will provide proper lubrication and less oil consumption than conventional methods. The system works because two ramps, strategically placed in the guide bar rail, help contain the flow of oil and direct all lubrication to the sliding faces of the bar and chain links as well as the rivets and driver holes, which in turn can reduce bar oil consumption up to 50%.
• STIHL Quickstop® - STIHL chainsaws are equipped with a chain stopping system designed to reduce the risk of injury in certain kickback situations. It is called a STIHL Quickstop® chain brake. The STIHL Quickstop® chain brake is designed to stop the rotation of the chain if activated by the operator’s hand or by inertia if the saw kicks back with sufficient force. The STIHL Quickstop® chain brake can be activated by inertia, stopping the chain within fractions of a second in some working positions.
• Lightweight Sprocket Cover with Captive Bar Nuts - For efficient saw chain maintenance, the sprocket cover is lightweight and the captive bar nuts are held securely in place.
• High Output Adjustable Oiler - When used with STIHL OILOMATIC ® saw chain and STIHL Ematic ™ guide bars, the high output oiler can supply additional lubrication if needed for longer guide bars and/or dry/dusty cutting conditions.
• Purge Pump Primer - The purge pump primer feature enables the user to prime the carburetor with fuel, enabling easier starting. The purge pump primer is designed in a way that the operator cannot flood the machine by priming the carburetor too many times. Flooding the engine is still possible if the choke is not removed after the engine turns over.