Step 1.
Hold drum securely. Push spool in, and turn clockwise until locking peg clicks.
Step 2.
Pull spool out of drum. Clear any remaining line or debris from spool and drum.
Step 3.
Align pegs on inner drive (A) with grooves in spool (B), and
install spool onto drum. Do not push down on spool. Turn spool counter clockwise until locking peg clicks into hole in spool (C).
Step 4.
Align arrows on spool with marks on drum
Step 5.
Insert two ends of one 24-foot piece of .095 nylon trimmer line into holes on sides of drum.