• 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 Easy2Start™ (E) - The STIHL Easy2Start™ system makes starting STIHL outdoor power tools almost effortless, eliminating the need for a strong pull of the starting cord. This advanced starting system is designed to make starting STIHL products easier. The specific system may vary by model, but in each case, a quick pull overcomes the engine’s compression to minimize the strength and effort required to start. Available on selected products.
• 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. In some working positions, the STIHL Quickstop® chain brake can be activated by inertia, stopping the chain within fractions of a second.
• IntelliCarb™ Compensating Carburetor - The IntelliCarb™ Compensating Carburetor is designed to automatically adjust the air/fuel ratio when the air filter becomes restricted or partially clogged and maintains the engine’s correct RPM. IntelliCarb™ uses air from the clean side of the air filter to control the diaphragm and flow of fuel. As the air filter becomes dirty and less air is available for the carburetor, the IntelliCarb™ system adjusts the fuel flow to compensate for the decrease in air flow. This is in contrast to typical carburetors that utilize this air from the “dirty” side of the air box.
• STIHL OILOMATIC® Saw Chain - The chain features specially engineered grooves designed to channel oil to critical wear areas.
• Adjustable Automatic Oiler - The Adjustable Automatic Oiler allows the user to adjust the lubricant of the guide bar and saw chain for different bar lengths and cutting conditions.
• Bumper Spikes - These spikes prevent pull-in and provide better control, making cutting easier.
• Front Hand Guard - The hand guard is designed to reduce the risk of injury.
• Rear Hand Guard - The hand guard is designed to reduce the risk of injury and provide a wide area for foot placement during starting.
• Easy-Access Air Filter Cover - The provided easy-access makes it almost effortless to remove the cover for fast filter cleaning or replacement.
• Toolless Fuel and Oil Caps with Retainers - Simply lift the lever and twist the caps to remove or tighten. There’s no need to use a tool to tighten or loosen.
• Translucent Fuel Tank - The semi-transparency allows operators to easily check the fuel level before starting work.
• Side-Access Chain Tensioner - The side-access chain tensioner makes it much more convenient for the user to adjust the saw chain with a bar wrench as opposed to the typical location of the guide bar adjustment screw.
• Protected Spark Plug - Spark plug terminal is protected, yet easy to change.
• Spark Arrester Muffler - Large baffles reduce noise level and contain a screen designed to reduce the emission of sparks.
• Anti-Vibration System - STIHL has developed a system for minimizing the vibration levels of handheld outdoor power equipment. The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience.
• Throttle Trigger Interlock - This safety feature must be depressed before the trigger can be activated.
• High-Tech Polymer Housings - Housings are lightweight, withstand greater impact, and are corrosion-resistant.
• Easy to Use - The lightweight and easy-to-use MS 151 C-E minimizes fatigue, allowing users to work longer and get more done.

Note: STIHL recommends 3670 005 0064 (71 PM3 64) OILOMATIC® saw chain and 12” 3005 008 3405 STIHL ROLLOMATIC® E MINI guide bar combination. Compatible guide bar ranges: 10" to 12". The actual listed guide bar length can vary from the effective cutting length based on which powerhead it is installed on. Dry weight and powerhead only.