Shut off the WeedEater Featherlite trimmer and allow the trimmer head to come to a complete stop. Pull off the end of the spark plug wire from the top of the spark plug with your fingers.
Place the Featherlite trimmer on its side so you can access the bottom of the trimmer spool. The fuel tank fill opening should point up.
Hold the outside of the trimmer spool with one hand. Pull on the tap button with your free hand and pull the spool away from the housing. The tap button is the button on the bottom-center of the spool that feeds line out when you tap it on the ground while trimming.