Looks like you found a weekend project! I would suggest you start by clearing off a large table an putting the weed waker on the table and to the best of your ability taking it apart. Take a screwdriver and remove all exterior screws holding on the plastic case, but be careful! Losing a screw can spell terrible news for the weed-whacker. Then hopefuly the solution will be as simple as unwinding the cord form the shaft. If not post more pictures and we can take another look.