SOUTHMARINE B07Y4RMYH5 Boat Motor Ignition Coil Mercury 339-803559A02 Quicksilver

( Brand: Southmarine ), ( Manufacturer Part Number: B07Y4RMYH5 ), ( Compatible Brand: Universal ), ( Type: Unit ), ( Color: Multicolor ), ( Item Length: 1 In )

Review SOUTHMARINE Boat Motor Ignition Coil Mercury Quicksilver

The **Southmarine B07Y4RMYH5 Boat Motor Ignition Coil (Part #339-803559A02)** is a high-performance, precision-engineered component designed exclusively for Mercury and Evinrude outboard motors, ensuring optimal ignition reliability and power delivery for your marine engine. Crafted to meet the stringent demands of modern marine propulsion systems, this ignition coil is engineered to provide a consistent, high-voltage spark essential for efficient combustion in both two-stroke and four-stroke marine applications. Built with durable materials, including a robust coil winding system and a protective casing, it is engineered to withstand the harsh marine environment resisting corrosion, moisture, and vibration while maintaining peak performance even under heavy loads or prolonged use. Compatible with a wide range of Mercury and Evinrude outboard models, including those equipped with the **Quicksilver** series, this coil is a direct-fit replacement for the original equipment manufacturer (OEM) part, ensuring seamless integration without the need for modifications. Its advanced design minimizes electrical resistance, maximizing energy transfer to the spark plugs and reducing the risk of misfires, which can lead to reduced fuel efficiency, engine stalling, or even long-term damage. Whether you're powering a sleek performance boat, a reliable workboat, or a family-friendly cruiser, this ignition coil delivers the reliability and responsiveness required to keep your engine running smoothly, season after season. Ideal for both professional marine technicians and DIY enthusiasts, it offers a cost-effective solution for maintaining peak engine performance while extending the lifespan of your outboard motor.

### Pros and Cons of buying a Southmarine B07Y4RMYH5 Boat Motor Ignition Coil for Mercury/Quicksilver

1. **Compatibility** This ignition coil is specifically designed for Mercury/Quicksilver outboard motors, ensuring a proper fit and optimized performance. The part number (339-803559A02) confirms it matches the original equipment manufacturer (OEM) specifications, reducing the risk of compatibility issues.

2. **Reliability** Southmarine is a reputable brand known for producing high-quality marine parts. A genuine or well-made ignition coil can prevent misfires, rough idling, and engine stalling, which are common issues when ignition components fail.

3. **Performance Improvement** A faulty ignition coil can lead to weak spark, poor fuel efficiency, and reduced power. Replacing it with a new or high-quality coil can restore smooth operation, better acceleration, and improved throttle response.

4. **Preventative Maintenance** Ignition coils are wear-and-tear components that degrade over time due to heat, moisture, and electrical stress. Replacing it proactively can avoid unexpected breakdowns during critical moments, such as during a trip.

5. **Ease of Installation** Ignition coils are relatively straightforward to replace, especially if you have basic mechanical skills. The part comes pre-wired in most cases, and the installation process typically involves disconnecting wires, removing the old coil, and securing the new one usually taking less than an hour.

6. **Cost-Effective Solution** Replacing a single ignition coil is far cheaper than overhauling the entire ignition system or dealing with engine damage caused by prolonged misfires. The cost is a fraction of what repairs or labor for more complex issues would entail.

7. **Extended Engine Lifespan** A properly functioning ignition system ensures that the engine runs efficiently, reducing strain on other components like spark plugs, fuel injectors, and the alternator. This can contribute to the longevity of your outboard motor.

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1. **Cost** While ignition coils are relatively affordable, the price may still be a concern for budget-conscious buyers. Prices can vary depending on whether you purchase it directly from Southmarine, an authorized dealer, or a third-party seller. Always compare prices to ensure you re getting a fair deal.

2. **Potential Counterfeit Parts** If buying from an untrusted seller (e.g., unverified online marketplaces), there s a risk of receiving a counterfeit or low-quality replica. Counterfeit parts may fail prematurely or not fit correctly, leading to further issues. Stick to reputable retailers or dealerships to avoid this.

3. **Skill Dependency** While the installation is simple, inexperienced DIYers might struggle with wiring or securing the coil properly. Incorrect installation could lead to electrical shorts, poor connections, or even damage to the motor s wiring harness. If unsure, consult a marine mechanic.

4. **Warranty Considerations** If your outboard motor is still under warranty, replacing the ignition coil with a non-OEM part might void the warranty. Always check with the manufacturer or dealer before proceeding to avoid unexpected costs.

5. **Limited Lifespan** Even high-quality ignition coils have a finite lifespan, typically lasting between 50 100 hours of use or longer, depending on usage conditions (e.g., saltwater corrosion, frequent starts, or high loads). You may need to replace it again in the future.

6. **Environmental Factors** Saltwater, humidity, and constant exposure to the elements can accelerate wear on the coil. If you frequently operate in harsh conditions, the coil may degrade faster than expected, requiring more frequent replacements.

7. **Part Availability** While this coil is widely compatible with Mercury/Quicksilver motors, older or less common models might have limited availability. Always verify that the part number matches your specific motor model to avoid ordering the wrong item.

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The **Southmarine B07Y4RMYH5 ignition coil (339-803559A02) for Mercury/Quicksilver outboard motors** is a solid choice for maintaining or restoring the performance of your engine. Its compatibility, reliability, and ease of installation make it a practical upgrade for most boat owners. However, the decision to purchase should consider factors like budget, installation confidence, warranty implications, and the source of the part to ensure you re getting a genuine, high-quality component.

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1. **Verify Compatibility** Double-check that the part number (339-803559A02) matches your exact Mercury/Quicksilver motor model. Cross-reference with your motor s serial number or consult the owner s manual to avoid purchasing the wrong coil.

2. **Purchase from a Trusted Source** Buy the coil from an authorized Southmarine dealer, a reputable marine parts retailer (e.g., West Marine, Sea-Doo dealers, or Mercury-authorized service centers), or a well-reviewed online marketplace (e.g., Amazon, eBay with seller ratings). Avoid unknown sellers to prevent counterfeit parts.

3. **Consider OEM vs. Aftermarket** If your motor is still under warranty, opt for the **OEM Southmarine coil** to maintain warranty coverage. If the warranty has expired, a high-quality aftermarket coil (e.g., from brands like **NGK, Denso, or Champion**) may offer similar performance at a lower cost.

4. **Install Properly** If you re not experienced with marine electrical work, have a professional mechanic install the coil to ensure proper wiring and secure mounting. Improper installation can lead to electrical issues or damage.

5. **Replace Related Components** While replacing just the ignition coil is often sufficient, consider replacing the **spark plugs** and **spark plug wires** at the same time, as they may also be worn and contribute to ignition problems.

6. **Monitor Performance** After installation, test the engine under various conditions (idling, cruising, revving) to ensure the coil is functioning correctly. Listen for smooth operation and check for any signs of misfires or rough idling.

- Cleaning the motor after saltwater use.

- Checking and tightening electrical connections.

- Replacing the coil every **50 100 hours** of use or as recommended by the manufacturer.

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- Your motor is compatible with the part number.

- You re purchasing from a trusted source.

- You re prepared to install it correctly or have a professional do it.

- You want to avoid misfires and engine damage.

- You re unsure about the motor s compatibility.

- The seller lacks credibility or reviews.

- Your warranty would be voided by using a non-OEM part.

- You lack the skills or tools for proper installation.

For most Mercury/Quicksilver owners, this coil is a **worthwhile investment** that can save money and prevent costly engine issues in the long run.

Details:

Specifications. Southmarine Boat Motor 339-803559A02 Ignition Coil For Mercury Quicksilver: Product Features: Engine Position: Outboard, 4-Stroke 8HP 9.9HP.: Engine Position: Outboard, 4-Stroke 8HP 9.9HP,Replaces Quicksilver Part OEM Number#: 339-803559A02 18-23207,Please carefully check the connectors with your old one before order.

part #: b07y4rmyh5 price

• $53.90

specifications speakerpartgo:

• brand: Southmarine
• mpn: B07y4rmyh5
• compatible brand: Universal
• type: Unit
• color: Multicolor
• item length: 1 In

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• type: Fixed
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• # reviews: 547
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• TV, Video Audio Parts > Speaker Parts Components > Voice Coils
• condition: New

offer speakerpartgo:

• started: May 28, 2026
• options: Ship-to-home
• quantity: 2
• availability: In Stock
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