HEI Ignition Coil MerCruiser Thunderbolt IV & V

This HEI ignition coil is compatible with MerCruiser Thunderbolt IV and V systems, providing reliable ignition for your engine.

• Brand: MerCruiser | Fits models: Thunderbolt IV, V
• Replaces part numbers 392-7803A4 and 392-805570A2
• Critical for optimal engine performance