ITEM NAME:Kill Practical Tether Boat Button Cut Off Safety Emergency Stop Switch Outboard Description: Black wire is direct to earth on the outboard Emergency kill, stop switch with lanyard for all outboard motors Many of the older outboards do not offer protection if you should fall out of your boat by cutting, stopping the engines ignition This essential device has a lanyard that wraps around your wrist or clips onto your clothing, it will stop the engine in the event of you having an accident on the water The switch is open circuit and is closed when the activated by pulling on the lanyard You may also activate by simply pressing on the red button If you have no spark to your outboards ignition system it may well be that your existing cut of switch may faulty or be stuck in the off position and will need to be replaced Specification: Material:Plastic Color:As pictures shown Switch Size: Approx. 2.8x5.5cm/ 1.10x2.17" Package Includes: 1pc*Emergency Kill Stop Switch Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-2 cm differences due to manual measurement..Black wire is direct to earth on the outboard. If you have no spark to your outboards ignition system it may well be that your existing cut of switch may faulty or be stuck in the off position and will need to be replaced.