[Basketcase]

When the engine is running does the primer bulb collapse? I would guess that some debris got lodged in the pickup tube. Probably would have happened whether you spit or swallowed the fuel from the tank. I assume it's an aluminum tank. You should be able to unscrew the pickup from the tank and clean it out or replace it. I had this happen on my bass boat and I just replaced the tube. It's a cheap off the shelf part at most boat shops. Do you have access to the tube where it enters the tank? I would assume so because you would have to have a way to replace the fuel lines. Another option would be to shoot compressed air into the tank from the fuel line. Just make sure the fill cap is off. This should shoot it back into the tank. Then you need to figure out a way to get it out of the tank. Perhaps if you take off the sender plate you could get the debris out somehow. Just not with a shop vac!!!