2016 Sea-Doo RXP? -X? 300 FAST 2 SEATER! The ultimate top-of-the-line racing watercraft combines power handling and control like nothing else on the water. And with the new 300 horsepower Rotax 1630 ACE engine nothing else will come close to you on the buoy course. Engine: - Fuel Type: 87 octane minimum 91 octane recommended - Cooling: Closed-Loop Cooling System (CLCS) Operational: - Weight Capacity: 400 lbs. (182 kg) Watercraft 2 Person DX78311419836300365 DX1