How do I replace the spool on the GL350?

Press the spool cover lock button (item 13) and remove the spool cap (item 11) from the spool housing (item 18). Pull out the empty spool, clean any dirt and grass from the spool and housing, then insert the new spool until it seats properly with the cutting line protruding approximately 136mm (5-3/8 in.) from the housing. BLACK+DECKER recommends replacing with model No. RS-350. Always switch off and unplug the unit before making any adjustments. (Page 10)