I have a 1995 cruiser yacht 3570 Espirit with twin XL crusader 454’s and have had fuel pump on port side. I had injectors cleaned but pump is chattering loudly and putting out very little volume. Anyone know what the GPH and pressure rating is so I can find a replacement pump? I sent cruiser yachts service dept an email but haven’t responded. I need one asap as I’m trying to sell my boat. Thanks