The ornamental design for a prop cover, as shown and described.
FIG. 1 is a front elevational view of a prop cover showing my new design,
with the cross-hatch pattern indicating a conventional fabric and with the
broken line showing for illustrative purposes only and forming no part of
the claimed design, and with the cross-stitch lines representing
conventional stitching;
FIG. 2 is a front elevational view of the prop cover of FIG. 1, shown in
isolation;
FIG. 3 is a rear elevational view of the prop cover shown in FIG. 2,
showing a drawstring type fastener;
FIG. 4 is a side elevational view of the prop cover of FIG. 2, shown
enclosing the propeller of a boat motor and showing the drawstring type
fastener pulled tight around the shaft of the propeller; and,
FIG. 5 is a rear elevational view of the prop cover of FIG. 4, shown laid
out flat and empty.