Hello from a newbie. Ordered a lower unit seal kit for my 1963 Evinrude 18hp. The prop shaft oil seal does not make contact with the shaft. The outside diameter fits properly but the rubber seal portion does not. I assume it should fit snug on the shaft. I got two seals with the kit and they both are the same. Wondering if anyone else has run into this issue. They are aftermarket seals. Thanks and have a great day.