A motorized watercraft having a hull on which the user can lie or stand wherein a flow channel is provided with an engine-driven water screw. The electric engine, batteries and control device for the electric engine are accommodated in the hull of the watercraft. The water screw, electric engine and control device are embodied as a drive unit and positioned in the flow channel. The batteries for the electric engine are arranged in a separate, interchangeable housing which is built into the hull of the watercraft. As a result, the motorized watercraft has a substantially simplified structure, is user friendly and easy to maintain.