The invention relates to a drive device (1) for water vehicles comprising a propeller (2), a drive mechanism (3) for driving the propeller (2), and a magnetic coupling (4) which is arranged between the propeller (2) and the drive mechanism (3), wherein the magnetic coupling (4) comprises an outer magnetic element (7), an inner magnetic element (9) and a can (11), and wherein the can (11) is arranged between the inner magnetic element (9) and the outer magnetic element (7).