Abstract: A watercraft includes a ventilation system for ventilating the engine compartment and for providing air for induction into the watercraft engine. An air duct extends through the hull and communicates with the engine compartment. An induction box is attached to a deck of the hull and encloses a space around the air duct. The induction box is sized so that pressure pulses are dissipated within the box. A portion of an outer edge of the induction box is cut way, forming an opening through which air can flow. A cowling substantially covers the induction box. Another structural aspect includes a pair of air ducts, each having an associated induction box. An opening of one induction box is generally forwardly facing. An opening of the other induction box is generally rearwardly facing.