Boat problems

25hp Mercury 2010

I've changed out the low and high pressure systems, impeller, thermostat, fuel pump, spark plugs, fuel lines, hose to the tank, oil, lower end gear oil.

Got scammed when I got the boat. I've done my best to fix it. I had it running smoothly at around 25 for 30 seconds when I took it out to the lake and fuel line popped thought I fixed everything and now its shitting out on me when I put it into gear. It’ll run in low gear but but as soon as I rev it up a little it dies. Any advice? I'm out of ideas.