... starting.3. Speed Limit ignition system with lower electricity resistance in coil, lus reconditioned initial idle speed setting, guarantee for ... system,providing clean air to engine6.With on/off switch. It always keeps in off position for safety reason.7.With V-belt ... precision carburator and fuel filter..10.With different blades---work in tough condition:concrete,stone,marble,asphalt,steel,mansory,11. ...