⚓ Ignite Your Adventure with Confidence! Experience the same quality and performance as original parts. Designed for seamless compatibility with Thunderbolt IV & V systems. Enjoy peace of mind with a 2-year/24,000-mile warranty. Restore your boat's performance with a reliable ignition coil. Save hundreds by replacing it yourself—no dealer needed! High Energy Ignition Easy DIY Replacement Compatible with MerCruiser The Replacement Inboard Ignition Coil by AA Ignition is a high-quality, cost-effective solution for restoring the performance of your MerCruiser Thunderbolt IV and V ignition systems. Designed for easy installation, this ignition coil is compatible with various GM V6 and V8 engines and comes with a 2-year or 24,000-mile warranty, ensuring reliability and peace of mind on the water.