How do you replace the line on an echo srm 2010 lawn trimmer?

To replace the line on an Echo SRM 2010 lawn trimmer, first, turn off the trimmer and disconnect the spark plug for safety. Remove the spool from the trimmer head by pressing the tabs and pulling it out. Cut a length of new trimmer line (usually 0.095 inches in diameter) to about 10-12 feet, then thread it through the spool, winding it in the direction indicated on the spool. Finally, reattach the spool to the trimmer head, ensuring the line is properly positioned in the eyelets, and reconnect the spark plug before use.