The ornamental design for a hood for a front engine riding mower, as shown and described.
FIG. 1 is a right front perspective view of a hood for a front engine riding mower showing my new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a top plan view thereof; and,
FIG. 4 is a front elevational view thereof.
The broken line showing of a riding mower with which the hood may be associated is for illustrative purposes only and forms no part of the claimed design.