My Motor Is A 1996 7.4 Mpi Mercruiser Replaced Fuel Pump Not The Problem Now I Have Uncovered Their Is No Power Getting To The Vst Tank And No Power To The Relay To The Vst Tank Help Pz

sounds like your ecm may have gone south have a merc dealer check it out for you.

There are two diff fuses, check those! On a 502mpi theres one on the lid and another inside that box