Disclosed herein is a marine installation including a marine propulsion device including a transom bracket adapted to be fixed relative to a boat hull, a swivel bracket including spaced parallel apertures and mounted on the transom bracket for tilting movement about a tilt axis extending parallel to the apertures, a propulsion unit mounted from the swivel bracket for common tilting movement and for propulsion unit steering movement about a steering axis perpendicular to the tilt axis, a steering helm comprising a housing adapted to be fixed relative to the boat hull and a steering shaft mounted on the housing for rotation upon a fixed axis, a pair of flexible push-pull cables each including an outer casing having spaced first and second ends, and an inner core having a first end and a spaced second end portion extending through the respective apertures, first connections fixedly joining the outer casing first ends to the housing, second connections fixedly joining the inner core first ends to the steering shaft for common movement therewith, third connections fixedly joining the inner core second end portions to the propulsion unit for displacement thereof about the steering axis in response to the inner core movement, and fourth connections fixedly joining the outer casing second ends relative to the swivel bracket, one of the connections including a member which is adjustable so as to displace relative to each other one of the inner core and the outer casing of one of the push-pull cables so as to remove slack from the installation.