Five stage filtration system with advanced directional air flow provides cleaner air for better saw performance. Carburetor engineered with improved deco-valve and metering spring for precise fuel regulation at start up. New ignition coil with start-support function stores electrical energy with each pull for easier start ups. Improved ignition system with large flywheel and rare earth magnets create more efficient power. Reinforced aluminum blade guard with 70 degrees range of limitless positioning using a marked knob handle. Improved ignition system with larger flywheel and rare earth magnets for create more efficient power. Cutting arm position simply changes from center position to flush (outboard) position allowing cuts directly adjacent to curb edges, wall or directly above the ground. On-off-choke operation switch on a single lever for operator convenience. Cushioned operator grips with 4 vibration-absorption rubber buffers for increased operator comfort. Microchip controlled carburetor designed to compensate engine timing according to work load.