Provided is a protective cover kit for a marine propeller having a protective cover and a shift control warning attachment. The protective cover components have a slit and a central opening with a plurality of reliefs radiating from its circumference capable of accommodating various sized propeller hubs or shafts. Attaching elements are coupled to a slit and the first layer and second layer of the protective cover. The first and second layers are of a shape capable of substantially encasing a marine propeller. Once a force is applied by a user to the release apparatus, the attaching element is released and the protective cover is removed remotely from a distance above the surrounding water of the marine propeller. A shift control warning attachment is installed by a user onto a shift control lever to prevent inadvertent shifting prior to the removal of the propeller cover.