Did you maybe swap the two lines around when you put it in? They only work one way. If you get them backwards it'll be trying to pump fuel OUT of the carb back to the tank. There also needs to be fuel where it tee's into the main fuel line. If not then it's just pumping air.
there are no fuel lines to deal with. It is just 2 screws that mount the primer to the side of the carb and it acts like a plunger.
yours is the same as mine, take it back out maybe you missed something.
I have taken off a few times cant see anything.