overheating

[Pot Hole]

Replaced the impeller this weekend. Old impeller was in excellent shape (no tips missing nor was it dry rotted). The old housing had a rubber bushing around the drive shaft where it entered the impeller housing. New kit didn't come with one. I went ahead and used the old bushing as it was in good shape. Cleaned everything up and put it back together. Not sure if that is my problem given that the old impeller was in such good shape.