The MS 251 is the successor to the popular MS 250 chain saw. This mid-sized unit will deliver great power to get through those bigger cutting jobs. Powered by a low emission and fuel-efficient stratified scavenging engine, it features the STIHL Quickstop® inertia chain brake, Master Control Lever™, anti-vibration system, carburetor preheat shutter for summer/winter operation, toolless fuel and oil caps with retainers and a high power-toweight ratio, making this unit a great chain saw for home or small property owners. Part of STIHL’s new generation of fuel-efficient, environmentally friendly chain saws.