I read it as though the op pulled and had the injectors tested after buying the boat....

Correct, ^^^ but he was told both engines were just completely rebuilt according to his first post, ether way he owns the boat.

Yes, There is a regular EFI type fuel filter at the back side of the intake just before the fuel goes into the rail. I did change that as well as filter/separator. I seriously think that the injector filters being in the rails instead of the injectors where they belong had something to do with it! I forgot to mention that I did change oil and filters again and the starboard motor did darken much quicker than port motor. I am going to change it once more.