Cranked the motor for the first time this season with no issues. Made about 15 minutes of cutting and motor cutoff. Tried to restart and would not even turn over. Tried to turn over by hand and could not. About an hour later went back and motor spun right over and cranked fine. Continued cutting and began smelling oil. Cutting deck was covered with oil. Pulled the motor and oil is blowing by PTO seal. Do not see any other issues but was wondering if a stuck ring could cause something like this to happen.