I just bought a 1972 Johnson 25 Hp outboard tiller for duck hunting. The guy brought it over and I put it on my boat and put the motor in a garbage can filled with water and she started right up and ran fine. Everything I checked was working great. Took the motor out of the water and let it drain out. The next morning I come out and it was below 32 degrees overnight and everything was locked up. It would not go into gear and it would not pull over at all. I heated up the lower unit and everything worked again, but after it sat for about 30 min it locked up again. I'm thinking that all the water is not draining out, but I really have no idea whats going on. Would appreciate any help before going forward.