I agree with the Inspector. You do not need to hear much more than the system psi and that gas is coming out the bowl vents to understand that you are flooding the engine. The other tip is having to hold the throttle wide open to get it to re-start. I think that you may also have pre-ignition issue due to poor gas. Have you read your plugs? Pull your plugs, keeping in mind with came from which cylinder. I'll bet you will see black deposits on the center insulator and they may even be wet. Take a look and they will tell you all you need to know. Google "Read spark plugs" and you will get great photos that will help. If this has been going on for a year, you may have to reset the floats and check the needle valves as they may be off at this point. The rusty pick up may contribute somewhat to the misfire issue but you have to fix the fuel issue first.