I just bought a used boat (2002) with HP500EFI's but I'm not sure what the drives are. There are no markings on the drives anywhere -- is there a way to visually tell the difference between the Bravo I, XR and XZ drives? Any help would be greatly appreciated.

if they have serial #'s i can run them through merc and tell you what they are.if not call me and i can tell you how to check them,chris,315 623 7642