- Stock #315289 - Upgraded 8.2L 380 HP Mercruiser, ECT thru-hull exhaust, Heated garage stored! CERTIFIED SINGLE OWNER BOAT! 2018 Sea Ray SDX 270 Deck Boat The single Mercruiser 8.2L MAG MPI motor with 380 HP is an upgraded option on this boat (was a $13K upgrade). ECT thru-hull exhaust (was a $5K upgrade). The black sports tower with bimini is also an upgraded option (was a $7K upgrade). Yes this boat has the submersible swim platform too. This is a great boat to enjoy with great features. The deep-V hull offers great stability and control even in choppy waters. The Sea Ray SDX 2... read more