Turn off the weedeater and disconnect the spark plug or remove the battery
Remove the spool cover
Take out the empty spool
Cut the replacement trimmer line to the correct length if needed
Insert the line into the spool according to the arrow direction
Wind the line evenly and tightly onto the spool
Leave the required amount of line free at the ends
Thread the line ends through the spool eyelets
Reinstall the spool into the head
Reattach the spool cover
Pull the line ends to confirm they feed properly
Reconnect the spark plug or battery before use