A reliable ignition system starts with the right key, and the Yamaha SG Key Set 704-8257C-04-00 is built to keep your outboard starting smoothly every time. Whether you're replacing a lost key or need a backup, this OEM Yamaha key set ensures a perfect fit and dependable operation. No more struggling with worn keys that stick or fail to engage properly-just a clean, secure start when you need it.. Why It's Worth Having on Hand:. Designed for Yamaha Outboards - Engineered for a precise fit, ensuring consistent and smooth ignition.. Durable and Corrosion-Resistant - Built to withstand marine conditions, resisting rust and wear over time.. Snug, Secure Engagement - Locks firmly into place to prevent slippage and ensure proper contact.. Ideal Replacement or Backup - A smart addition to your gear, whether you need a spare or a direct replacement.. When to Consider a New Key Set:. Worn or Loose Keys - An old key can lose its shape over time, making starts unreliable.. Lost or Misplaced Keys