The ornamental design for a motorhousing with integralguard apron for a grasscutter, as shown and described.
FIG. 1 is an elevational view of one side of the motor housing with
integral guard apron for a grass cutter showing my design, the other side
being mirror-identical thereto;
FIG. 2 is a front elevation thereof;
FIG. 3 is a rear elevation thereof; and
FIG. 4 is a top elevation thereof.
The bottom of the motor housing with integral apron, is unornamented.