Some areas, Im not sure about OZ, its hard to get different colors of fuel tubing. I put a wire tie loosely on the carb-tank line, that way I can't mess it up without trying really hard!

Did someone else mention to make sure you know where your muffler- tank line is pointing as you fill? It really stings to have the fuel squirt out into your eye. I usually keep it pointed downward with other hand on kill switch of pump. course if your using a hand pump, you can be pretty close with a simple count.