How do you restring an echo srm 261?

To restring an Echo SRM 261 trimmer, first, turn off the engine and disconnect the spark plug for safety. Remove the spool by pressing the tabs on the sides and pulling it out. Cut a length of trimmer line (typically around 20 feet), then insert one end into the spool's hole and wind the line evenly in the direction indicated on the spool. Finally, reattach the spool to the trimmer, ensuring the line is properly threaded through the eyelets, and reconnect the spark plug.