Mercury - Quicksilver 823054Q Stop Switch Lanyard (Fork Style) Mercury 2.5-6HP 4-Stroke Outboards 823054Q. Overview. Safety gear isn't optional - it's essential. The Quicksilver 823054Q Stop Switch Lanyard (Fork Style) is designed for Mercury 2.5-6HP 4-stroke outboards, ensuring the engine shuts off instantly if the operator leaves the helm.. This bright red/orange, coiled lanyard clips securely to your life vest or belt and attaches to the engine-mounted stop switch. Made with a stainless-steel