Mercury - Zero Effort Digital Control (Shift/Shift, Port Mount) Remote Control 8M0085481. OverviewThis Zero Effort control gives you a simple two-lever shift setup, the kind of arrangement performance drivers like when they want gear changes to stay clean and predictable. Both levers have the same steady feel, so you can run them by touch without second-guessing what you grabbed. The port-side mount fits the way many race and performance rigs are laid out, keeping things close and easy to reach.