(Reference Numbers: Perkins: 2645698 Delphi:5352104 [nozzle BDN4SD6769) FLANGE TYPE INJECTOR. The Perkins 4.108 engine is used in both the marine and industrial applications.The Perkins 4.108 predecessor, the Perkins 4.99 and the Perkins 4.107, also referred to as the Westerbeke 40, are very popular as marine engines. ].