Fuel Pump prob?

Yes to your question on the fuel bowl running dry...the engine will stumble. Since you replaced the fuel lines, check your work. A hose clamp of improper size can let air get sucked into the line thereby starving the carb. A kink in the line can starve the carb.

Remove the pressure line from the carb, ground the negative side of the coil, put the fuel line a container, activate the starter and see if you get a healthy stream of fuel. If not, change the fuel pump with marine fuel pump. No need to go electric...mechanical pumps work fine.

I put new fuel lines and filter on the boat before I put it in the water. Also had the gas tank out at that time ...no apparent trash in tank or pickup tube.

Right now Im planning on getting an electric pump. As far as I can tell, it should run around 4.5 lbs. pressure. I dont have factory specs on the marine engine. (Ford automotive 6 beaters of that generation look like they use 4.5)   Thanks

Just got back from my second time out with my newly aquired 64 American Skier. It has a Ford /Interceptor inline 6. The first time out it ran like a top. This time however, as we had just throttled up and not quite on plane ,the engine stumbled and acted like it was going to die. The motor still ran ,but only at slightly higher than idle.

When we tried to get it back on plane, it would do the same thing again ,anywhere from almost immediatelly to maybe 30 seconds.

My thoughts are low fuel pump pressure,or maybe stuck float in carb? Im leaning toward the fuel pump...it may not be keeping up with the extra demand when throttling up. Would the engine start to increase rpms only to faulter when the carb bowl runs empty?

Any thoughts? Also is a marine pump different than automotive? What about an electric pump?
Thanks!