Originally Posted by wink_man

Stuck check valve that is built into the hose barb at the gas tank where the gas line attaches to it?

I had the same issue, and just fixed it today on my boat. Very precision fit on that check valve ball, doesn't take very much to clog it in the closed position. It literally sets the tank up for failure not being able to feed fuel to the motor.

Replaced mine today with a Moeller hose barb and I made sure I purchased one WITHOUT a check valve in it.