I have an existing kill switch. Can I install the MOB+? FELL Marine December 19, 2017 13:32 Updated Follow Yes. MOB+ is easily installed using wires from your existing kill switch. Please see installation guide for instructions. Related articles Download User Manuals as PDF Do I have to install the MOB+ after a main power switch? I do not have an existing kill switch. Can I install MOB+? Engine warning when the MOB+ goes into MOB Mode or the MOB+ is not connected, is this normal? What are the maintenance requirements for MOB+?