Be better off to let a prop shop do this, for ballence reasons. Otherwise you may end up with a bad vibration, kinda like having a propfull of weeds will do.!! Most marinas have a service for this, and it (most of the time) is less exp. then a new prop. However if you opt for the new prop, be shure to keep the old one in the boat for emergancies, nothing more frustrating then rowing back after hitting bottom and breaking a prop. BEEN THERE !!!