Boat cuts out after 5 min or at low RPM

They boat will run fine when I am pulling someone or driving but once I idle down or put the boat in neutral it cuts out. It doesn't happen every time, but enough to be a problem. The boat starts right up afterward and will run fine again. I got home and hooked up the fake-a-lake to see if it happened again. Sure enough, the boat cuts out after about 5 min.

All the gauges look fine. I replaced the fuel filter and fuel/water separator thinking it might be a fuel problem. Nothing really changed.

Any other suggestions on things I should be looking for or trying to replace?

Thanks