The ornamental design of a snowmobileprotectivecover, as shown and described.
FIG. 1 is a rear left perspective view showing a snowmobile protective cover with a snowmobile in broken lines, according to a first embodiment of our design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof; and,
FIG. 6 is a top plan view thereof.
Throughout the Figures, broken lines showing environment are for illustrative purposes only and form no part of the claimed design.