Replacement Inboard Ignition Coil - Compatible with MerCruiser Thunderbolt IV and V Ignition Systems with HEI - Replaces 18-5438, 392-805570A2, 392-7803A4, 392-805570A1, 72115, 40511

Key features

• Replacement Inboard Marine Engine Ignition Coil - The ignition coils or ignition coil plug provides spark for your engine. Over time the factory ignition coil packs can fail leading to hard starting or losing power when the engine is hot or your boat may run erratically. Replace your faulty ignition coil and restore performance and driveability on your boat.
• Compatible Replacement for Mercruiser GM V6, V8 308 & 350 Engine With Thunderbolt IV & V Ignition System - Only works with HEI (High Energy Ignition) Systems and will not work with Point Ignition Systems. This replacement ignition coil by AA Ignition made by an original equipment supplier will get your 4.3L, 5.0L, 5.7L, 6.2L, 7.4L & 8.2L petrol engines with Thunderbolt 4 and 5 ignition systems.
• Replaces Part# 18-5438, 392-805570A2, 392-7803A4, 392-805570A1, 72115, 40511, 9-29701, 64570, RL5438. The ignition coil of your boat can easily be located beside the distributor which is found in the engine.
• OEM Fit, Quality, Finish - While this is not a genuine part, it is a direct replacement for your boat or boat engine and it will appear, fit and work like the factory part. Save time and hundreds of dollars off of dealer prices by replacing the part yourself.
• 2 years or 24,000 Mile Warranty - This ignition coil pack comes complete with a 2 year or 24, 000 mile warranty. If the coil ever fails on your boat within the warranty period, simply contact us for a replacement. Save time and money by taking advantage of this warranty.