I have an existing kill switch. Can I install the MOB+? FELL Marine July 02, 2021 12:59 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 I have more than one / multiple engine(s) on my boat (or kicker engine) How hard is it to install? Do I have to install the MOB+ after a main power switch? I do not have an existing kill switch. Can I install MOB+?