Mercury MerCruiser Ignition Coil Kit 8M0079202
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Mercury MerCruiser Ignition Coil Kit – 8M0079202
Maintain strong and reliable spark performance with the Mercury MerCruiser Ignition Coil Kit 8M0079202. This genuine Mercury OEM ignition coil is designed for MerCruiser GM-based V6 and V8 sterndrive and inboard engines equipped with Thunderbolt IV or Thunderbolt V ignition systems.
The coil converts battery voltage into the high-voltage spark required to ignite the air-fuel mixture in the engine cylinders. Built to Mercury Marine OEM specifications, this ignition coil ensures consistent ignition performance and dependable engine operation in demanding marine environments.
Key Features
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Genuine Mercury Marine / Quicksilver OEM ignition coil kit
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Designed for Thunderbolt IV and Thunderbolt V ignition systems
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Provides strong, consistent spark for reliable engine performance
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Marine-grade construction for durability in harsh environments
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Direct replacement for original Mercury ignition components
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Meets Mercury Marine OEM quality and performance standards
Part Details
OEM Part Number: 8M0079202
Mercury Reference Number: 300-8M0079202
Product Type: Ignition coil kit
Voltage: 12V ignition system
Replaces / Cross References
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392-7803A4
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392-805570A2
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Sierra 18-5438
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CDI Electronics E18-0008
Compatible MerCruiser Engines
Designed for GM-based MerCruiser gasoline engines using Thunderbolt IV or V ignition, including:
MerCruiser V6 Engines
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MerCruiser 4.3L V6
MerCruiser Small-Block V8 Engines
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MerCruiser 5.0L V8
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MerCruiser 5.7L V8
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MerCruiser 350 MAG
MerCruiser Big-Block V8 Engines
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MerCruiser 6.2L V8
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MerCruiser 7.4L V8 (454 MAG)
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MerCruiser 8.2L V8 (502 MAG)
These engines are commonly installed in MerCruiser sterndrive and inboard marine engine packages equipped with Thunderbolt ignition systems.
Function
The ignition coil transforms 12-volt battery power into high-voltage electricity needed to fire the spark plugs. Proper ignition coil performance is critical for smooth engine operation.
Replacing a faulty coil helps:
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Restore strong spark to the ignition system
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Improve engine starting and idle performance
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Prevent misfires and power loss
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Maintain reliable engine operation
Important Compatibility Note
Ignition components vary depending on engine model, ignition system type, and serial number range. Always verify compatibility using the engine model and serial number before ordering to ensure the correct ignition coil.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.