I've got a 1988 22' Donzi Classic with a 454/Bravo 1. It's a 25th Anniversary Edition that's in pretty fair original condition and runs well under 4000 rpm. Much over that and it intermittently starts to cut out like fuel starvation. I think it's a stock motor but has an Edelbrock intake and carb on it. I've replaced the Mercruiser screw-on cartridge fuel filter and it hasn't changed. My question is if anyone knows if there is a sock type fuel filter on the pick up tube in the fuel tank.