I have a CAL 39 with a Universal 5444 (M50) diesel. I recently purchased this boat and am going through the engine. I noticed that I only have an electric fuel pump between my tanks and the engine. I also have a pdf Parts List from Westerbeke for this engine. The schematic in the pdf shows a mechanical lift pump (P/N 299425) which mounts on the side just below the injection pump. My engine does not have this mechanical pump. Instead it has a blank cover where the pump should be. Does anyone know or have an opinion as to why this might be and should I purchase and install one? I would appreciate also any other Universal diesel owners letting me know if their engine has one or not. The year of my boat is 1982. Many thanks in advance.