I was wonder if any one could help my ski (98 GTX) used to do between 60 and 65mph. I removed the pump to replace some seals and now when I go out I can only get around 50 mph. This does not make sense to me as the drive shaft will only go back into the machine if it is lined up correctly. I have also checked to see if the throtle cable became a little loose but it appears to be fine. Any ideas what to look for would be great. Thanks in advance.