hello,replaced the impeller on a blueband 25 hp ,1980,and there is a small oil slick permantly around the lower leg area ,,where the drive shaft comes out from the impeller housing ,is there only the large rubber grommet ,i take it there is no seal of any type between the lower leg and the upper leg ,or can bad seals on the oil plugs cause asuch a leak,,sorry to say havent checked if the oil is milky yet ,but the o ring on the gears hasnt showed any signs of leakage,,thanks tony