The jet ski has not been in the water yet, it is new. Sea-Doo RXP-X RS 300 (2023 Model) This is one of Sea-Doo's most powerful sports jet skis, designed for speed and racing enthusiasts. Engine * Engine: Rotax 1630 ACE * Horsepower: 300 HP * Displacement: 1630 cc * Supercharger with Intercooler Performance * Very strong acceleration.