Thanks for the advise guys! I appreciate it being that im new to this thing.
I'll try the return line and drop my pressure back to 6psi.

Im just really affraid of it backfiring in the 110 degree weather in Arizona where I boat.

DO you think my carb floats might be out of adjustment too?

Sometimes when its anchored in on the water for an hour or more, it wont start. Is this this due to the bouncing around? The engine seems flooded.
Could I prevent this with a fuel shut off valve??..or??