1988 Supra Mariah This is a classic 1988 inboard ski boat. She is in very good condition for a 1988!! Great first boat well maintained. Recent engine compression test shows 147-150 all cylinders. Tandem trailer in good condition, and a NEW COVER. Get on the water this spring with this affordable pre owned inboard ski boat. We have this unit on consignment and the SELLER IS MOTIVATED! Won't last...