There are 2 lines going into the tank. One is supply, which goes to the primer bulb. The other is a return line which connects to fuel return rail near air cleaner. There are 90 deg. fittings, pressed into rubber grommet, where they go into tank. The grommet usually comes out with the fitting, but when reassembling you will want to put the grommet in the tank before pushing the fitting into the grommet. Below the 90 deg fitting on the supply line needs to be a short piece of fuel line, usually clear line is used. There used to be a screen with a check valve at the borrom of the line, but I think they stopped using these on newer models. If you don't use a screen on the end, be sure to cut the bottom end of the fuel pickup hose at an angle to prevent it from possibly sticking to the inside of the tank.