Engine

FIG. 1 is a front, left, upper perspective view of an engine showing our new design;

FIG. 2 is a rear, right, lower perspective view thereof:

FIG. 3 is a front view thereof

FIG. 4 is a rear side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom side view thereof.

The broken lines shown in the drawings illustrate portions of the engine that form no part of the claimed design.