I am still experiencing hard starting on both of my Mercruiser 7.4 MPI engines after they have been shut off for about three hours on the water. Someone suggested I do a leak down test on the fuel pressure system. Does anyone know, once I attach the gauge to my schrader valve on my fuel rail, what pressure I should be reading when the engines are running? That would be a good starting point to hopefully fine that fuel is slowly leaking into my combustion chambers causing a flooding condition due to some faulty fuel injectors?