Mercury - Electric Steering Helm Core Kit Steering System 98-8M0157716. OverviewThis electric steering helm is the core piece used in boats running Joystick Piloting or single-outboard electric steering. It gives the wheel a smooth, even feel without the feedback or resistance you get from traditional hydraulic setups. Turns stay steady whether you're idling around a marina or running in open water. Once it's installed, the whole steering system feels lighter and more controlled.. Key Features •