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Item #:
75418523
Marine Ignition Coil Compatible with Mercruiser Thunderbolt IV & V Ignition Systems,Replace Sierra 18-5438,392-7803A4 392-805570A2 37068 805570A2
Item #:
75418523
AUD 55
Price Details
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Imported from USA store
QTY:
Order now and get it around Friday, August 14
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What Stands Out
Compatibility
This ignition coil is specifically designed for Mercruiser Thunderbolt IV & V ignition systems, ensuring reliable performance and a perfect fit for your marine engine.
High Quality
Constructed with premium materials, this ignition coil provides durability and longevity, ensuring your marine engine operates smoothly, even under challenging conditions.
Easy Replacement
Designed as a direct replacement for Sierra 18-5438 and other compatible models, this coil simplifies installation, allowing for quick fixes and minimized downtime on the water.
Product Details
| Package Weight | 2 Pound |
Who Should Buy?
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Boat Owners
Owners of Mercruiser engines looking for reliable ignition coils to enhance their boat's performance and reliability.
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DIY Mechanics
DIY enthusiasts who want to replace ignition coils themselves, providing a cost-effective solution for engine maintenance.
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Performance Seekers
Users aiming to improve engine performance and responsiveness during water sport activities with upgraded ignition systems.
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Non-Mercruiser Users
Users with non-Mercruiser engines will not find compatibility with this ignition coil, leading to potential issues.
Product Description
Marine Ignition Coil Compatible with Mercruiser Thunderbolt IV & V Ignition Systems,Replace Sierra 18-5438,392-7803A4 392-805570A2 37068 805570A2 9-29701
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What is a marine ignition coil and how does it work?
Answer: A marine ignition coil is an essential component of the ignition system in boats, converting low voltage from the battery into high voltage needed to spark the engine. This high voltage is sent to the spark plugs, igniting the fuel-air mixture in the engine cylinders. Proper functioning of the ignition coil ensures optimal engine performance, smooth starts, and efficient fuel use. In powerboats equipped with Mercruiser Thunderbolt IV and V ignition systems, a reliable coil can contribute significantly to engine reliability and longevity. -
Question:
Is this ignition coil compatible with my Mercruiser engine?
Answer: Yes, this ignition coil is specifically designed for compatibility with Mercruiser Thunderbolt IV and V ignition systems. It replaces several OEM parts, including Sierra 18-5438 and Mercury 392-7803A4, making it versatile for various Mercruiser models. If your engine uses the listed models, this replacement will fit seamlessly, ensuring your engine’s electrical system operates at peak performance efficiently. -
Question:
What are the signs of a failing marine ignition coil?
Answer: Common signs of a failing marine ignition coil include difficulty starting the engine, reduced engine power, misfiring, or stalling while in operation. If you notice these symptoms, it could indicate that the ignition coil isn't providing adequate spark to the spark plugs. Addressing these issues quickly by replacing the coil can prevent more significant engine damage and enhance overall performance. Regular maintenance checks can help identify problems before they escalate. -
Question:
Can I install the marine ignition coil myself?
Answer: Yes, installing a marine ignition coil can be a DIY task for those with basic mechanical skills. The process typically involves disconnecting the battery, removing the old ignition coil, and securing the new one in place. It's important to follow the engine's manual for specific instructions and ensure all connections are secure. This can save you time and money, as doing it yourself can lead to a better understanding of your engine's electrical system. -
Question:
What should I consider when replacing my ignition coil?
Answer: When replacing your ignition coil, consider compatibility, quality of materials, and the reputation of the brand. Ensure the new coil matches OEM specifications for your Mercruiser engine to guarantee optimal performance and longevity. Additionally, look for products that boast durable construction to withstand the harsh marine environment, as well as good customer reviews to ensure you are purchasing a reliable part. -
Question:
How often should I replace my marine ignition coil?
Answer: The marine ignition coil should be inspected regularly, and replacement is typically suggested every few years or as signs of wear appear. Factors such as exposure to moisture, high temperatures, and stressing can affect its lifespan. If you notice performance issues or are regularly maintaining the engine, it's sensible to check the ignition coil's condition proactively. Keeping an eye on this component helps in achieving a reliable boating experience. -
Question:
How does a new ignition coil improve engine performance?
Answer: A new ignition coil can significantly improve engine performance by providing a stronger and more consistent spark at the right time. This ensures efficient combustion of the fuel-air mixture in the cylinders, leading to smoother engine operation, better fuel efficiency, and more power. Upgrading to a quality ignition coil can also reduce the likelihood of misfires, resulting in a cleaner and more powerful ride on the water. -
Question:
Where can I buy the Marine Ignition Coil in Australia?
Answer: You can buy the Marine Ignition Coil compatible with Mercruiser Thunderbolt IV and V systems conveniently at Ubuy in Australia. Ubuy offers a wide selection of marine parts, ensuring you find the right ignition coil for your engine while providing a seamless purchasing experience. -
Question:
What happens if I use the wrong ignition coil?
Answer: Using the wrong ignition coil can result in various performance issues, including poor engine starts, misfires, and loss of power. An incompatible coil may not provide the required voltage or spark timing needed for your specific engine model. This can lead to increased wear on other components and possibly cause engine damage over time. Thus, it's crucial to ensure that any replacement part is specifically designed for your make and model. -
Question:
What is the life expectancy of a marine ignition coil?
Answer: The life expectancy of a marine ignition coil can vary but typically ranges from 2 to 5 years, depending on usage and operating conditions. Factors such as engine load, exposure to elements, and maintenance can significantly influence its longevity. Regularly monitoring the condition of your ignition coil and replacing it when necessary can enhance overall engine reliability and ensure optimal performance while on the water.
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Pros
- Easy installation
- High-quality performance
- Compatible with multiple models
- Durable construction
- Improves engine reliability
Cons
- May require slight adjustments.
Platform Trust & Buyer Confidence
CJ
Chris
Verified buyer
“Promt delivery. Seems like a good product.”
22 July 2026 · via Trustpilot
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Scott
Verified buyer
“It was the best service ever received by any company from my online shopping experience in the last 10yrs”
11 July 2026 · via Trustpilot
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Terri
Verified buyer
“so easy to order delivery was way earlier than i expected”
3 July 2026 · via Trustpilot
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Gavin
Verified buyer
“Very impressed with the speed at which I received my package from the United States to Australia. Highly recommended.”
21-Jul-26 · via Trustpilot
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Jeannie
Verified buyer
“Very efficient service. Hassle-free. Excellent product. Have ordered several times.”
17-Jul-26 · via Trustpilot
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AUD 55
Order now and get it around Friday, August 14
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
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Features & Benefits
- Compatible with MerCruiser Thunderbolt IV and V Ignition Systems.
- Replaces multiple part numbers for easy integration.
- Durable construction ensures reliability and longevity.
- Application-specific design guarantees a perfect fit.
- Fits GM V-6 & V-8 Engines with HEI systems.
- Ideal for marine Power and performance.
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