Boat trouble

My buddy had the boat out last weekend and apparently it took a dump on him. This is what he said: "Yea it ran fine once it was running, and the weird thing is it just died when it was running and didn’t start after that. It would fart and sputter like it would want to start, or like it was flooded, but no matter what I did it just wouldn’t start."

So, any ideas for us to look at? Thanks for any help!