>>>*Any time an engine will idle or run with part throttle but stalls at any speed or distance you are correct to suspect fuel.

My guess would be something in the tank partially blocking the pickup, especially since it solved itself.

That happened to me with an old Dodge once. I changed the fuel tank, put in a used one. It had a small amount of fuel in it, in the shuffle something got knocked loose. I worked on that one for a few days, finally took the tank back out. That one had an inspection plate which I took off, I retrieved some leaves covering the pickup screen.

And yep, could have just been some water, too....*EB