The highlighted item is an Edon GX-390 gasoline engine, a heavy-duty clone model Honda GX390 design.
Technical Specifications
Engine Type: Single-cylinder, 4-stroke, air-cooled, Overhead Valve (OHV)
Output Power: 13 Horsepower (HP)
Displacement: 389 cc
Starting System: Manual recoil pull-start (red fan shroud assembly)