Mike, I need the same help as my boat is same as yours but simply purchased by centurion. Mine was original SKI SUPREME by Supreme Industries that Centurion now owns. Engine is the same I believe. Which engine do you have and if you received the step by step info., it would be greatly appreciated if same could be shared. I have the 351 c.i./255 h.p. 1980 Pleasurecraft Marine engine within a certified 'pullboat' for American Water Ski Association. It was purchased from one owner how had for 34 years but they are now unavailable due to illness and I would not feel right in trying to reach them. Thanks in advance for a reply. Kevin Callihan