2 years ago there was a discussion on this subject and i hope the experts who gave advice are still around or some one who knows how to route the fuel lines can help. My chain saw's lines fell apart and there is no diagram that helps me route the new ones i purchased. I have read some threads on this but they all say there are two fuel lines: one coming out of the fuel tank to the primer bulb and one fuel line that goes back into the tank from the carb. I only see one whole in the body of the saw that lead into the tank. Is there a model where there is not return or am i missing something and if so where would it be?