2001 merc 225 i hit something and broke off approx 4in of skeg and did very minor damage to prop.i noticed this evening with the boat out of the water and in gear i can turn the prop about a qtr turn without the shaft moving. normal or not. if not do i need a hub kit? i was thinking of getting a spair prop anyway how hard is it to install this stuff myself. am going to bass pro shop fri. cha ching.