Mercury - MP Alert Control Module SmartCraft Prop-Safety Controller 8M0117114. Overview. The MP Alert system relies on a central controller to activate the warning lights at exactly the right time. The Mercury 8M0117114 MP Alert Module is that controller. It's the SmartCraft-ready brain of the Moving Prop Alert system, turning the lights on automatically whenever the propeller is in motion. On boats with Joystick Piloting, the module also integrates with the SkyHook feature, giving you prop-moti