I just put a new shaft and impeller in my 97 SLT700, and tested it yesterday. It was very difficult to start, and when it did, I could run at only about half power. I know my battery is bad; I'll replace that today. Would a comprimised battery explain lack of power?

Throughout the many starts and stops, on one occassion the boat began idling, and moving in a reverse direction. This machine doesn't have reverse! It only happened once. When I killed the engine, and restarted, it then moved in the proper forward direction.

Any suggestions, ideas?