Black wire connects directly to earth on the outboard. Emergency kill stop switch with lanyard for all outboard motors. Many older outboards do not offer protection if you fall out of your boat by cutting or stopping the engine ignition. This essential device includes a lanyard that wraps around your wrist or clips onto your clothing, stopping the engine in the event of an accident on the water. The switch is open circuit and closes when activated by pulling the lanyard. You may also activate it by pressing the red button. If there is no spark to your outboard's ignition system, the existing cut-off switch may be faulty or stuck in the off position and require replacement. Material: ABS Color: Black + Red Package Contents: 1 x Emergency Kill Stop Switch 1 x Kill Switch Safety Tether Only the above package content; other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to differ slightly from the real thing. Measurement allowed error is +/- 1-3 cm.