Replacing fuel lines can be a difficult messy business. Most of us would take the weed wacker in to a local service center for repair. If you need to locate one close to you, try the link below. If you are the handy type and want to tackle this yourself it would help the expert if you can add the model number of your unit to this thread. In the meantime, you can check a previous expert answer for fuel lines that I attached below. Hope this helps.