- Compatibility: Designed to fit STIHL chainsaw models MS171, MS181, and MS211, ensuring easy installation and perfect operation. - Direct Replacement: This ignition coil replaces STIHL part number 1139 400 1307, providing a reliable solution for maintaining your equipment's performance. - Package Contents: Includes 1 ignition coil, ready for immediate use in your STIHL chainsaw. - Enhanced Performance: Upgrading or replacing your ignition coil can significantly improve engine performance, ensuring smooth starts and reliable operation. - Versatile Applications: Ideal for both routine maintenance and urgent repairs, this ignition coil can help restore your chainsaw's ignition efficiency, making it a vital component for keeping your outdoor tools in peak condition. - Durable Construction: Made with high-quality materials, this ignition coil is designed for durability and long-lasting performance, so you can tackle any job without worry. Ensure your STIHL chainsaw operates at its best by using this premium ignition coil for maintenance or repairs. Whether you're a professional landscaper or a DIY enthusiast, this part will help keep your equipment running smoothly.