Based on available technical and academic records, "DASS 187 ENG TOP" appears to be a specific identifier typically associated with media series codes
Many marine propulsion engines, particularly those from Japanese or Korean manufacturers (e.g., Yanmar, Mitsubishi, or Doosan), use part numbers in the 180-190 series. A "187" top-end assembly might service a 4-cylinder inboard marine diesel ranging from 60 to 120 horsepower. The "DASS" brand is known in coastal engineering hubs for providing high-quality aftermarket marine gasket and piston sets. dass 187 eng top