2017 Sea-Doo RXP? -X? 300 RXP-X 300 - ULTIMATE RACING WATERCRAFT The ultimate top-of-the-line racing watercraft combines power handling and control like nothing else on the water. And with the 300-hp Rotax 1630 ACE engine nothing else will come close to you on the buoy course. Watercraft 2 Person DX13461785482922495674 DX1