AA Ignition
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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
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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
Replace your faulty ignition coil and restore performance and driveability on your boat.
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
Item #: 21983357

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

Item #: 21983357

USD 65

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*All items will import from US

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Order now and get it around Tuesday, June 30
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Replace your faulty ignition coil and restore performance and driveability on your boat.
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What Stands Out

Compatibility
Seamlessly fits MerCruiser Thunderbolt IV and V ignition systems, ensuring reliable performance without compatibility issues for boat enthusiasts and mechanics.
High-Quality Build
Constructed with premium materials for durability and longevity, providing peace of mind and reducing the frequency of replacements for boaters.
Easy Installation
Designed for straightforward installation, allowing users to replace the ignition coil quickly and efficiently without requiring professional assistance.

Product Details

Shop online for a high-quality replacement inboard ignition coil compatible with MerCruiser Thunderbolt IV and V ignition systems at Ubuy Palau. Replaces 18-5438, 392-805570A2, 392-7803A4, and more.
  • Compatible replacement for Yamaha outboard motors 4-stroke engines
  • Replaces part numbers: 63P-81950-00-00, 63P819500000, 63P-81950-00, 63P8195000, 63P 81950 00
  • OEM fit, quality, finish - direct replacement for 4-strokes outboard engine car
  • Fits various outboard engines such as F-25 HP, F-40 HP, F-50 HP, F-60 HP, F-75 HP, F-90 HP, F-150 HP, F-225 TLR HP, F-250 HP
  • Allows the engine to trim down and adjust the angle for smoother boat operations
  • Symptoms of a bad tilt and trim relay include unable to tilt/trim engine, poor fuel economy
Package Weight2.53 Pound

Who Should Buy?

Suitable For
  • Boat Owners

    Ideal for boat owners needing a reliable replacement ignition coil for MerCruiser Thunderbolt IV and V systems.

  • Marine Mechanics

    Perfect for marine mechanics looking for compatible ignition coils to service applicable MerCruiser engines efficiently.

  • DIY Enthusiasts

    Great for DIY enthusiasts who want to replace their inboard ignition coil without professional assistance.

Not Suitable For
  • Outboard Motors

    Not suitable for outboard motor applications as it specifically caters to inboard ignition systems only.

  • Older Models

    Not ideal for older MerCruiser models outside the Thunderbolt IV and V compatibility range.

  • Professional Race Teams

    May not meet performance requirements for professional race teams needing high-performance ignition components.

Product Description

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

About This Item

Introducing our top-of-the-line Replacement Inboard Ignition Coil, specially designed to be compatible with MerCruiser Thunderbolt IV and V Ignition Systems with HEI. This high-quality ignition coil is the perfect replacement for your old, worn-out coil. Whether you're facing ignition issues or just looking to upgrade your boat's performance, our ignition coil is the answer you've been searching for.

With its superior build and craftsmanship, our ignition coil guarantees reliable performance and increased durability. You can trust that it will stand the test of time and provide consistent ignition power to keep your boat running smoothly. This ignition coil is a direct replacement for various OEM part numbers, including 18-5438, 392-805570A2, 392-7803A4, 392-805570A1, 72115, and 40511. Rest assured that you're getting a high-quality product that meets or exceeds industry standards. MerCruiser Thunderbolt IV and Thunderbolt V owners will be delighted with the seamless installation process of this ignition coil.

Simply remove your old coil and replace it with our superior-quality, fully compatible ignition coil. It's that easy! Don't let an old, faulty ignition coil hold you back from enjoying your time on the water. Upgrade to our Replacement Inboard Ignition Coil today and experience the difference it makes in your boat's performance.

Trust us, you won't be disappointed!.

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What makes this replacement ignition coil compatible with MerCruiser Thunderbolt IV and V systems?

    Answer: This replacement ignition coil is specifically designed to work seamlessly with MerCruiser Thunderbolt IV and V ignition systems. It features the same specifications and connectors as the original OEM components. This compatibility ensures reliable performance, optimal spark generation, and contributes to the overall efficiency of your marine engine. If you're experiencing issues like hard starting, misfires, or poor engine performance, upgrading to this ignition coil can restore functionality and enhance your boating experience.
  • Question: What are the common signs that indicate I need to replace my ignition coil?

    Answer: Common signs that indicate you may need to replace your ignition coil include engine misfires, difficulty starting the engine, or poor acceleration. You may also notice unusual engine noises or stalling while idling. If you're planning a long boating trip, it’s crucial to ensure that your ignition systems are functioning properly to prevent unexpected issues on the water. Replacing a faulty ignition coil proactively can save you time and money on more extensive repairs down the road.
  • Question: Can I install this replacement ignition coil myself, or should I hire a professional?

    Answer: This replacement ignition coil can typically be installed by someone with basic mechanical skills. However, if you are unfamiliar with marine engine components or electrical systems, it may be advisable to hire a professional. Installation involves disconnecting the battery, removing the old coil, and connecting the new one, which should be done carefully to avoid damaging other components. For those who enjoy DIY projects, this replacement offers an opportunity to learn about your engine while ensuring it runs smoothly.
  • Question: Is this ignition coil a direct replacement for the OEM part numbers?

    Answer: Yes, this ignition coil is a direct replacement for the OEM part numbers 18-5438 and 392-805570A2. The precision in manufacturing means that it will fit into the existing setup without requiring modifications. Direct replacements are essential for maintaining the integrity of your ignition system and ensuring optimal performance. This means you can install this coil with confidence, knowing it meets or exceeds the original specifications.
  • Question: What is the warranty policy on this ignition coil?

    Answer: The warranty policy on this ignition coil varies by seller, but most reputable manufacturers offer a warranty period that covers defects in materials or workmanship. It's advisable to check the specific warranty details provided by the retailer. Having a warranty ensures peace of mind, as it protects your investment. Should you encounter any issues within the warranty period, you can typically receive a replacement or refund, ensuring your engine remains reliable for your boating adventures.
  • Question: What materials are used in the construction of this ignition coil?

    Answer: This ignition coil is constructed from high-quality materials designed to withstand harsh marine environments. Common materials include durable plastics, high-temperature resistant wires, and corrosion-resistant connectors. These materials ensure that the coil is not only functional but also durable, capable of performing well in the face of moisture, salt, and vibrations commonly found in marine settings. Choosing a coil with quality construction is critical to longevity and performance.
  • Question: Where can I find customer reviews for this ignition coil?

    Answer: Customer reviews for this ignition coil can typically be found on e-commerce platforms where the product is sold, as well as automotive/marine forums. These reviews provide valuable insights into the experiences of other users, including performance, reliability, and overall satisfaction. Additionally, checking reviews can help you understand any common installation tips or concerns that may arise. User feedback can be instrumental in determining whether this ignition coil meets your expectations.
  • Question: Can this ignition coil improve fuel efficiency?

    Answer: Yes, a new ignition coil can improve fuel efficiency by ensuring that the spark plugs receive a consistent and strong spark. When your ignition system is functioning optimally, it leads to better combustion, which can enhance fuel economy. Additionally, replacing a worn ignition coil can prevent misfires which often negatively impact fuel consumption. This is particularly important for boaters looking to make the most of their fuel during long trips on the water.
  • Question: What is the expected lifespan of this ignition coil?

    Answer: The expected lifespan of a high-quality ignition coil like this one can typically range from 50,000 to 100,000 miles of use, although this can vary based on usage and maintenance practices. Factors such as engine load, marine conditions, and proper heat dissipation can all influence longevity. Regular inspections and timely replacements can help maximize the life of the ignition coil, ensuring that your engine remains reliable for numerous boating seasons.
  • Question: Where can I buy the Replacement Inboard Ignition Coil?

    Answer: You can conveniently purchase the Replacement Inboard Ignition Coil compatible with MerCruiser Thunderbolt IV and V ignition systems from Ubuy. Ubuy offers a user-friendly platform to ensure a seamless shopping experience in Palau, with quick shipping and various payment options. This makes it easy to acquire the essential parts needed to keep your boat running smoothly. Check out Ubuy for the latest availability and details to make an informed purchase.

AA Ignition Coils Editorial Review

This ignition coil is designed for Mercruiser GM V-6 & V-8 petrol engines with Thunderbolt IV & V Ignition which includes engines 4.3L V6, 5.0L V8, 5.7L V8 (Inc 350 MAG), MX6.2L V8, 7.4L V8 (Inc 454 MAG), and 8.2L V8 (Inc 502 MAG). The coil is oil-filled and has a primary resistance of 1.7-1.8ohms and secondary resistance of 10.2K to 11.6K ohms. It requires an input voltage of 12-15v. The reviews for this product are mixed. Some customers have had good experiences and have stated that the coil works flawlessly or is of good quality at a low price. One customer also mentioned that their boat started getting a spark after installing it, which is positive feedback. However, many customers have had negative experiences with this coil. Several customers experienced their boat breaking down or having to get towed in after installing the coil. Other customers had issues with the coil failing within a short amount of time, despite it being a new brand. Additionally, some customers found it to be a junk part and had difficulty replacing it. One customer was disappointed that it took them a long time to figure out the coil was the problem and now the return window is closed. Overall, it seems that while some customers have had a positive experience with this ignition coil, many others have had negative experiences with it. It may be worth considering authentic Mercury parts instead to avoid these issues.

Customer Reviews & Ratings

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Pros

  • -Low price-Easy to install-Oil-filled-Works well for some customers

Cons

  • -Many customers experienced issues with the coil failing or causing their boat to break down-Difficult to replace-Negative customer reviews

Product Price History

Important information

  • Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
  • Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

USD 65

Order now and get it around Tuesday, June 30

QTY:

Secured transactionsecured transaction

Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.

Our Top Logistics Partners
  • fedex
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Fastest cross-border delivery

Features & Benefits

  • Replacement Inboard Marine Engine Ignition Coil
  • Compatible Replacement for Mercruiser GM V6, V8 308 & 350 Engine With Thunderbolt IV & V Ignition System
  • Replaces Part# 18-5438, 392-805570A2, 392-7803A4, 392-805570A1, 72115, 40511, 9-29701, 64570, RL5438
  • OEM Fit, Quality, Finish
  • Direct replacement for your boat or boat engine
  • Save time and hundreds of dollars off of dealer prices