For all series motor boats and outboard motors without battery and electric start. - Easy installation: Mounts on the engine stop switch button with no welding or drilling required. - Emergency stop protection: Pull the rope to immediately cut engine ignition in an accident, helping keep the boat and passengers safe. - Durable and waterproof: Made of high-quality plastic lanyard that resists water, corrosion, rust, wear, and aging for long-lasting performance. - Expandable and flexible: Rope extends to the desired length and retracts when not in use for convenient operation. - Anti-tangle design: Swivel snap hook with a rotating connector prevents tangling and allows smooth movement in critical moments. - Reliable ignition switch replacement: Plastic key/ cable component resistant to corrosion, rust, wear, and aging; waterproof and durable; suitable as a replacement for motor stop line. - Wide compatibility: Suitable for motor boats and outboard motors of all series without battery and electric start; serves as an emergency stop/quickstop replacement. - Excellent stretchability: Flexible, durable rope with a rotating buckle to minimize tangling; a dependable quickstop replacement for outboard motors.