Poulan Pro PP28CD 28cc Curved Shaft String Trimmer, 16" Air Purge feature removes air from carburetor and fuel system for easy starting A quick, easy start is at your fingertips with the Spring Assisted Effortless Pull Starting System Pro-Link trimmers quickly and easily convert to any of six optional attachments. Compatible with other consumer brand attachments Surefire fuel delivery system features and easy no fuss, no choke starting every time