I have changed the lower unit oil and noticed that there was water in the lower unit. I replaced the impellar, water pump seals and refilled with oil. I ran the motor with earmuffs and I went and checked the oil and there was a hint of water agian. Also when running I noticed that there was water exiting from the prop housing. Where should I be looking for water entering the LU with just using earmuffs. Is water supposed to exit the prop housing. I believe that there is exhaust in the prop area. 1972 115hp Merc. Thanks.