Mercury - Quad Engine Start/Stop Pad (Port) Low-Profile Control Pad 87-8M0117140. OverviewThis Start/Stop pad gives you quick, push-button control of the port-side engines on a quad-engine DTS setup, as long as the keyswitches are already in RUN. It sits low and clean on the helm, so it doesn't crowd the dash or get in your way. When you're easing into a slip, making small course corrections, or cycling the engines during a long day on the water, having the port pair right at your fingertips mak