Has anyone ever had to change out the fuel sender unit on a S-330? My fuel gauge reads full all the time. Also got a message about a faulty wire. I found the sender unit and can feel a severed wire coming out of the plug on top of the unit. How in the **** do you change out the sender unit and repair wiring without being able to see it? I'm really not wanting to take it to Bobcat to get repaired. Thanks.