The primer should have 2 line connections. When you press the primer, one will blow air out, and when you release it, the other will draw air in. The one that draws air in will go to the connection on the carb opposite of the fuel mixture screws. The one that blows air out goes directly to the tank. The other line goes from the connection closest to the mixture screws, and to the tank as well. It should have a long piece that reaches the bottom of the tank, and has a fuel filter on the end, inside the tank.
jim, August 2008