How do I perform a Ryobi weed eater string replacement?

To perform a Ryobi weed eater string replacement, first turn off the weed eater and disconnect the spark plug. Then, remove the spool cover and take out the old string spool. Cut a new piece of string to the appropriate length and thread it through the spool. Wind the string in the direction indicated on the spool and secure the ends. Finally, replace the spool back into the weed eater and reattach the spool cover.