If the fuel line had come unhooked there would be a leak, right? Is there any way to tell if its the fuel pump just from looking for some signs?

My Dad's friend lives 120 miles away, I'm pretty much on my own here. I could call him and ask, he may know someone here in Des Moines to call. It was in the garage w/ no ventilation for a week while I was gone, lots of rain...could it have any moisture in the engine causing it to not fire?

Thanks!

Angela