I recently acquired a 1999 Stingray CS 220 with a 5.0L EFI, ALPHA ONE and only 120 hours on it. It runs great and sounds fine until I make the slightest turn and then it sounds like the prop is cavitating with really loud growling. Can you experienced boat guys tell me what to look for in trying to diagnose the problem? What measurements do I need to take, settings on the lower unit, etc. I can take photos and post also. I look forward to your suggestions. Thanks.