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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, 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 with 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 back up and running properly.
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 OEM 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.

If your boat won't run at full power or is hard to start then a faulty ignition coil may likely be the cause. This replacement ignition coil by AA Ignition made by an original equipment supplier installs quickly and will bring your boat motor back up to full power. Installation is straight forward and will restore performance and driveability on your boat in minutes Replaces the following part numbers: 18-5438 392-805570A2, 392-7803A4, 392-7803, 3000-8M0079202, 392-805570A1 72115 40511 9-29701 Pro Marine 64570 RL5438 Compatible with Mercruiser GM V‑6 & V‑8 petrol engines w/ Thunderbolt IV & V ignition: 4.3L V6 5.0L V8 5.7L V8 (Inc 350 MAG) MX6.2L V8 7.4L V8 (Inc 454 MAG) 8.2L V8 (Inc 502 MAG) This is a compatible replacement part manufactured by AA Ignition. This ignition coil pack is NOT a genuine part. Their associated models and part numbers are used in this listing only to identify the vehicles this ignition coil pack fits.