If you haven't removed the prop in several years you may find it difficult to remove. A 3# hammer and a block of wood is now your best friend.
Place the block of wood at the thick end of one of the prop blades and smack it with that hammer 2-3 times.......if no movement rotate the prop to the next fin blade and repeat until it loosens and comes off.......now check the spines on both the prop and shaft.....it should show corrosion between the SS prop and brass prop hub splines.......clean with penetrating oil and a brass brush..........once clean grease them both up ( I use wheel bearing grease) for a EASY removal next year.
Of course check for fishing line, and replace the thrust bearing/washers the way you removed them........and then the prop nut and your NEW SS cotter pin.