I have done the complete system only once, that was another boat, same model diesel, different setup though. I want to swap out both fuel filters on the new boat to have a baseline on maintenance. I went to the DAHL website and printed out the instructions on the 100 water/fuel separator filter, I already know how to do the Yanmar filter. As part of the DAHL instructions it also shows the "proper" way to mount and plumb, however, that's not the way Island Packet set it up.

The way it is supposed to be set up is fuel tank to electric pump, electric pump to the DAHL, DAHL to the manual fuel pump, manual fuel pump to the Yanmar filter, Yanmar filter to the injector pump and return line to the tank.

The way it is set up is that the electric pump is after the DAHL so it actually sucks the fuel through it rather than pumping it through. Once I introduce air into that filter by changing it, how do I get prime to the electric pump? My original plan was to fill the bowl of the DAHL as close to the top as I can without dumping diesel everywhere, then button the system up. I figured I could turn the ingnition to ON, put a rag over the oil pressure alarm and let the electric pump push the air through system, to the return lines and to the tank. (BTW, I already changed the Yanmar fuel filter and bled that with the manual pump lever). You would think that in the 800 hours of run time on this motor that someone changed the DAHL filter element at least once?

Thoughts?