The ornamental design for an enginegenerator, as shown and described.
FIG. 1 is a front and right side perspective view of an engine generator showing my new design.
FIG. 2 is a front and left side perspective view thereof.
FIG. 3 is a rear and right side perspective view thereof.
FIG. 4 is a rear and left side perspective view thereof.
FIG. 5 is a front elevation view thereof.
FIG. 6 is a rear elevation view thereof.
FIG. 7 is a right side elevation view thereof.
FIG. 8 is a left side elevation view thereof.
FIG. 9 is a top plan view thereof; and,
FIG. 10 is a bottom plan view thereof.
The portion of the engine generator shown in broken lines is for the purpose of showing environmental structure only and forms no part of the claimed design.