Description: The STIHL MS 171 is part of the lightweight generation of STIHL chainsaws with reduced emission technology a significant benefit for users because it saves fuel even as it cuts exhaust emissions. The MS 171 also has the STIHL pre-separation air filter, which can extend filter life up to five times over previous models. Features: 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 engines 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. Easy-to-Use Homeowner Chainsaw -Featuring powerful performance and lightweight convenience, this homeowner chain saw gets the job done when it comes to yard maintenance and cutting firewood. Lightweight Portability -This product is lightweight for easy portability, great maneuverability, and extended use. Translucent Fuel Tank -The semi-transparency allows operators to easily check the fuel level before starting work. 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. Master Control Lever -The Master Control Lever is an easy to use single lever, operating the choke, starting throttle lock, and on-off switch. The operator must pull the throttle trigger before moving the Master Control Lever to the choke position. 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. 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. Made in America -A majority of STIHL products sold in America are made in America of U.S. and global materials. Specifications: Brand Name: Stihl Assembled Weight (lbs): 9.5 Bar Length (in): 16 California Model: Yes California Proposition 65 Warning Required: Yes Capacity: Fuel: 9.5 Oz Compatibility: 3/8 Country of Origin: United States Dry Weight (lbs): 9.5 Engine Displacement (cc): 31.8 Fuel Type: Gas Handle Type: Yes Keyless / Keyed Blade Change: Keyed MFG Part # (OEM): 1139 200 0246 US Overall Length (in): 16 Package Contents: Chainsaw, Chain, and Manual, Chain Package Depth: 32 Package Height: 12 Package Weight: 10.5 Package Weight (lbs): 10.5 Product Condition: New UPC: 886661018123 Warranty Type: 1 Year Limited Width Weight Height Length 0Inch 9.5Pounds 0Inch 16Inch