I'm new here so HI everyone. I just bought a '72 18ft Tahiti with a 454 and a Berkley jet pump. All week I was preparing for the weekend and it would start and idle fine in the driveway. Saturday I took it out and ran fine wide open but bogged very quikly when letting out. Problem got worse the more it ran.
Thinking it was starving of fuel I refilled and changed the fuel filter which was dirty and tryed again. Still crapped out at anything above 3k. Checked everything and found carb was spitting back, like it was trying to feed the fuel pump? Never seen that before! Took it off and I'm having it rebuilt but any other sugg? I saw another post of a similar problem and everyone thought maybe water in fuel so I am getting a water seperater. Do all boats usually get water in fuel? Is 50 at 5k with I swear a 75 ft tail good or should it be more speed less tail?