After you pull off the shroud that holds the recoil, you will see 3 or so tabs that hold the "wheel" in the shroud. This wheel is grooved or slotted so the rope will wind inside the wheel. Sometimes the cord gets jammed between the wheel and shroud ( I am thinking of my experience with Briggs & Stratton)
With respect to the coil spring, try to avoid letting it slip out. There is an easy way to replace the rewind spring, but I forgot how to do it.
Good luck
Robert Brown
September 2008