Let’s Dive into Sierra International 185187 Ignition Coil
The Sierra International 185187 Ignition Coil is a crucial component for specific Mariner and Mercury outboard engines, designed to deliver the spark needed for reliable combustion. This coil promises to meet or exceed OEM standards, ensuring a dependable replacement for aging or failing coils. Considering the frustrations caused by unreliable ignition, I was eager to see if this coil could restore consistent performance to my older outboard.
My trusty fishing boat, equipped with a Mercury 225 DFI, had been experiencing intermittent starting issues and occasional misfires at higher RPMs. Diagnosing the problem led me to suspect a failing ignition coil, a common issue with these engines over time. Instead of opting for a potentially overpriced OEM part, the Sierra International coil presented a cost-effective alternative, promising equivalent performance and reliability.
Upon unboxing, the Sierra International 185187 Ignition Coil felt solid and well-constructed. The materials appeared durable, and the overall build quality seemed comparable to the original coil it was intended to replace. It’s simple design didn’t scream innovation but rather dependable function.
I considered other aftermarket coils from different brands, but Sierra International‘s reputation for marine engine parts and the direct OEM interchangeability solidified my decision. The attractive price point of $149.99 was also a significant factor, especially compared to the often inflated prices of genuine Mercury parts. I was cautiously optimistic, hoping to restore my engine’s smooth operation without breaking the bank.
Real-World Testing: Putting Sierra International 185187 Ignition Coil to the Test
First Use Experience
My initial test took place on a brisk morning at my local lake, known for its challenging chop and unpredictable winds. I installed the Sierra International 185187 Ignition Coil following the engine’s service manual, which was a straightforward process thanks to the coil’s direct fit design. The moment of truth came when I turned the key; the engine fired up almost instantly, a stark contrast to the hesitant starts I had been experiencing.
Out on the water, the engine ran smoothly and powerfully across the entire RPM range, even under load when pulling a skier. The coil performed flawlessly in the damp environment, showcasing its ability to deliver a consistent spark even with moisture present. No issues were observed.
Extended Use & Reliability
After several weeks of regular use, including multiple fishing trips and recreational boating excursions, the Sierra International 185187 Ignition Coil has proven its reliability. The engine continues to start quickly and run smoothly, without any of the previous misfires or hesitations. There have been no obvious changes in performance.
I’ve noticed no signs of wear or degradation on the coil itself, even after prolonged exposure to the elements. Maintaining the coil is simple; a quick visual inspection for corrosion and a wipe down with a damp cloth are all that’s needed. It has greatly improved my boating experience.
Breaking Down the Features of Sierra International 185187 Ignition Coil
Specifications
- Compatibility: Designed for Mariner 200DFI, 225DFI, V135DFI (2.5L), and V150DFI (2.5L) outboard engines, as well as Mercury 3.0DFI outboard engines. This broad compatibility makes it a versatile option for various Mercury and Mariner models.
- Interchangeability: Directly interchangeable with Mallory 9-23201, Mercury Race Outboard 339-856991A1, Mercury Sport Jet 339-856991A1, and Mercury Marine 339-850227 and 339-856991A1. This eliminates the guesswork and ensures a hassle-free replacement process.
- Quantity: Includes one ignition coil per package. It’s important to verify how many coils are needed for replacement.
Performance & Functionality
The Sierra International 185187 Ignition Coil excels at delivering a consistent and powerful spark, crucial for optimal engine performance. It’s able to consistently provide the necessary voltage, even under demanding conditions, resulting in reliable starting, smooth idling, and strong acceleration. The improvement was clear from the start.
The coil’s performance has met and even slightly exceeded my expectations, especially considering its competitive price point. The reliable ignition it provides has not only improved the engine’s performance but also given me peace of mind while out on the water. The only improvement would be if they included some dielectric grease with the coil.
Design & Ergonomics
The Sierra International 185187 Ignition Coil features a robust design, built to withstand the harsh marine environment. The coil is encased in a durable housing, protecting it from moisture, vibration, and extreme temperatures. Its design emphasizes functionality and reliability over aesthetics.
The coil’s compact size and direct-fit design make it easy to install, even for those with limited mechanical experience. There’s no complex wiring or modifications required. This “plug and play” design drastically simplifies the replacement process.
Durability & Maintenance
The Sierra International 185187 Ignition Coil appears to be built for long-term durability. Its robust construction and protective housing suggest it can withstand the rigors of marine use. The coil is simple to maintain; regular visual inspections for corrosion or damage are generally sufficient.
Accessories and Customization Options
The Sierra International 185187 Ignition Coil doesn’t require any specific accessories or customization options, as it is designed to be a direct replacement part. It seamlessly integrates with the existing engine wiring and mounting points. The primary “customization” is simply ensuring you’re using the correct spark plugs for your engine.
Pros and Cons of Sierra International 185187 Ignition Coil
Pros
- Direct OEM replacement, ensuring a perfect fit and easy installation.
- Significantly more affordable than genuine Mercury/Mariner parts.
- Improved engine starting and overall performance, with consistent spark delivery.
- Durable construction designed to withstand the harsh marine environment.
- Reliable performance that meets or exceeds OEM standards.
Cons
- Only comes with a single coil, necessitating purchasing multiple units for multi-cylinder engines, which could increase the overall cost.
- Does not include dielectric grease, which is generally recommended for marine electrical connections.
Who Should Buy Sierra International 185187 Ignition Coil?
Perfect for boat owners with Mariner 200DFI, 225DFI, V135DFI (2.5L), and V150DFI (2.5L), or Mercury 3.0DFI outboard engines experiencing ignition problems. DIY mechanics who prefer to handle their own engine maintenance will also find this coil particularly appealing. It’s an excellent choice for boaters looking for a reliable and cost-effective alternative to expensive OEM parts.
Those who should skip this product are individuals with engines not listed as compatible, as well as those who prefer exclusively using genuine OEM parts regardless of price. Anyone who is uncomfortable working on their own engine should also have this installed by a certified marine mechanic. Dielectric grease is a must-have accessory to apply to the connections during installation.
Conclusion on Sierra International 185187 Ignition Coil
The Sierra International 185187 Ignition Coil provides an excellent value proposition for boat owners seeking a reliable and affordable replacement for their aging or failing ignition coils. Its direct OEM replacement design, durable construction, and consistent performance make it a worthwhile investment. The $149.99 price is certainly justified.
I wholeheartedly recommend the Sierra International 185187 Ignition Coil to anyone experiencing ignition issues with their compatible Mariner or Mercury outboard engine. Restore your engine’s performance and enjoy peace of mind on the water – grab a Sierra International coil today and get back to boating!