Just got my 1989 15hp model CE15ECEC motor out from storage after a couple of years. Was put away good and started 2nd pull. After running for a while in neutral in the tub noticed bit of frothy brown leaking leaking from the prop...guessing that the lower gearcase seal is dried out and leaking. Can I change the seal by removing the nut and prop and pulling out the seal or is there more to it than that? What can I use to pull out the old seal? Thanks for any help, Roscoe