I have a 1993 24' Explorer with a 5.7 VP FWC Duo Prop I/O. I absolutely love it. I repowered 4 years ago, checked the transom and all was fine. My Dad has a 1988 Seafarer, also I/O. The original motor was a 5.0 OMC Cobra. We repowered his last year to 5.7. We did not remove the transom shield...