What Moch said...
and be careful with brand new line on the reel. It tends to tangle in mid-air and those tangles are nasty to undo. Feathering the spool with a finger while the line comes off during the cast helps a lot. After several trips usage, the line gets a little dirty and you don't have to worry about this any more. Also, I recall being frustrated in the beginning by the limpness of the line, but you get used to it pretty quickly.

I use 18 pound TUFF line on a Shimano Spirex 4000 and 9.5 foot spinning rod for bobber/jig fishing for steelhead.