- Stock #412184 - Low hours on twin 150 4-stroke Mercury. Reburbished and repowered. 1987 Grady-White 23' Gulfstream with 2017 Mercury engines with only 142 hours of running time. There is a reason you see older model Grady-White boats still running... they were built to last. Built solid and made to take the open water or the inside chop with ease. In 2019-2020 the boat underwent a refit of mechanical, electrical, and electronics. The transom was also replaced. The prior owner has receipts for the repairs. Even a new Danford anchor with 250' of rope. The Gulfstream model is a walkaround ... read more