Briggs & Stratton 5 hp with external fuel assist pump. Apparently I did not pay enough attention to how the lines were connected before disconnecting them all. On one side there is 1 nipple and the other half has 2 nipple. I am assuming that the one nipple goes to the crankcase. The other 2 I can blow through one and it will exit the other but not the opposite. Which one goes to the fuel tank and which to the carb? Or does the crankcase one go to one of the 2 nipples? I cannot find any diagragms that show where these lines go. Any suggestions?

There are usually markings on the pump to show in flow and out flow. They may look like a small triangle the point marking the direction of the flow. Usually the two nipples that are closest together are the fuel line in and crankcase pressure line. the one by itself is usually the fuel out to carburetor. The two nipples to the back of the pump are for the fuel and the one closest to the front of the pump is the pulse line.