Five-stage, foam-paper-nylon system with Advanced Directional Air Flow provides very clean air for better saw performanceReinforced aluminum blade guard with 70° range of limitless positioning using a marked knob handleImproved ignition system with larger flywheel and rare earth magnets for more powerCutting arm position simply changes from center position to flush (outboard) position allowing cuts directly adjacent to curb edges, walls or directly above the groundStarter grip and decompression valve located on the same side for faster startingOn-Off-Choke operating switch on a single lever for operator convenienceCushioned operator grips with 4 vibration-absorption rubber buffers for increased operator comfortWater kit is assembled to saw and can be used with garden hose, gravity tank or pressure tankImproved exhaust emissions are EPA Phase II compliant while maintaining power and performance