Let’s Dive into Sierra International 185139 Contact Set Mercury
The Sierra International 185139 Contact Set Mercury is a crucial component for maintaining the reliable operation of Mercury outboard motors. Specifically designed as a replacement part, this contact set ensures the ignition system functions correctly, allowing boaters to enjoy smooth sailing and avoid frustrating breakdowns. It is manufactured by Sierra International, a trusted name in aftermarket marine parts known for producing quality replacements. I decided to give this set a try to help keep my old fishing boat running smoothly.
My vintage Mercury outboard was starting to show its age with inconsistent starting and occasional misfires. A faulty contact set in the ignition system seemed the most likely culprit, and I needed a reliable replacement to get back on the water. Other aftermarket brands were available, but I chose Sierra International based on their established reputation for quality and compatibility with Mercury engines. Honestly, I was hoping this would be a straightforward fix to get my old boat back on the water!
The packaging was simple and functional, offering basic protection for the parts. Upon opening the box, the contact set appeared well-made with clean connections and a solid feel. The materials looked durable, and the construction seemed robust enough to withstand the harsh marine environment. My initial impression was cautiously optimistic; it seemed like a quality replacement part.
I considered a couple of generic contact sets from lesser-known manufacturers, mainly due to their lower price points. However, the potential for poor fitment, unreliable performance, and premature failure steered me towards the Sierra International part. Opting for Sierra International felt like a safer bet for long-term reliability, even if it meant spending a little more upfront. I chose reliability over saving a few bucks.
I was eager to install the Sierra International 185139 Contact Set Mercury and get my outboard running smoothly again. There’s nothing quite like the feeling of a well-tuned engine purring to life, so I was excited to potentially solve my boat’s ignition issues. My initial excitement was tempered with a bit of apprehension, hoping the installation would be hassle-free and the part would perform as expected. It was time to get my hands dirty and find out.
Real-World Testing: Putting Sierra International 185139 Contact Set Mercury to the Test
First Use Experience
I installed the Sierra International 185139 Contact Set Mercury in my 1978 Mercury 850 outboard motor, right in my driveway. The installation required removing the flywheel and accessing the points and condenser, a fairly standard procedure for this type of engine. I tested the engine immediately after installation on a flushing attachment to confirm proper operation before heading to the lake.
The weather was clear and sunny, but the temperature was cool, around 55°F. Despite the chill, the engine started on the first pull after installing the new contact set, a significant improvement over its previous performance. There was no hesitation or misfiring, and the engine idled smoothly. The performance under these conditions was excellent.
The installation was straightforward, thanks to the precise fit of the Sierra International part. No modifications were necessary, and the connections were secure. However, adjusting the points gap required some patience and a feeler gauge to ensure proper timing. The process took about an hour, including flywheel removal and reinstallation.
The immediate improvement in engine starting and idling was a pleasant surprise. My old motor had been struggling to start reliably for weeks, and the new contact set resolved the issue immediately. There were no unexpected problems or complications during the initial test run. I was relieved and excited to finally have my boat back in working order.
Extended Use & Reliability
After several weeks of use, the Sierra International 185139 Contact Set Mercury continues to perform flawlessly. I’ve taken my boat out on the lake multiple times, clocking over 20 hours of run time. The engine consistently starts quickly, idles smoothly, and runs without any misfires or hesitation.
So far, there are no visible signs of wear or tear on the contact set. The connections remain secure, and the points appear to be in excellent condition. I regularly inspect the ignition system as part of my routine maintenance, and the Sierra International part has shown no signs of deterioration. It looks as good as the day I installed it.
Maintaining the contact set involves periodically checking and adjusting the points gap. The Sierra International part is easily accessible for this maintenance procedure. A quick cleaning with a points file ensures optimal performance and extends the lifespan of the contact set. The ease of maintenance is a significant advantage.
The Sierra International 185139 Contact Set Mercury has significantly outperformed my expectations. Before installing this part, I was constantly worried about whether my boat would start or if it would leave me stranded on the water. This contact set has restored my confidence in my old outboard motor, making boating enjoyable again. It’s like a new lease on life for my engine.
Breaking Down the Features of Sierra International 185139 Contact Set Mercury
Specifications
The Sierra International 185139 Contact Set Mercury is specifically designed as a replacement for Mercury part numbers 336-4318A2, 336-3948A3, 336-4318A3, 336-4318A, and 336-3948A2. This precise interchangeability ensures a proper fit and reliable performance in compatible Mercury outboard motors. Understanding compatibility is crucial for a successful installation.
- Precise Fitment: The contact set is engineered to match the exact dimensions and specifications of the original Mercury part. This eliminates the need for modifications and ensures seamless integration into the ignition system.
- Durable Construction: Made from high-quality materials, the contact set is designed to withstand the harsh marine environment and provide long-lasting performance. This includes resistance to corrosion, heat, and vibration.
- Optimal Contact Points: The contact points are precisely aligned and manufactured to provide consistent and reliable spark generation. This is critical for efficient combustion and smooth engine operation.
- Interchangeability Note: As noted in the product description, (2) 18-5139 contact sets are equivalent to (1) 336-4318A2. This is an important consideration when ordering replacement parts.
- Fit Specificity: It’s essential to check the part numbers to ensure proper fit, as indicated in the product description. Compatibility is key to avoiding installation issues and ensuring correct operation.
These specifications are important because they directly influence the reliability and performance of the ignition system. A properly functioning contact set ensures consistent spark, smooth engine running, and trouble-free boating. The Sierra International 185139 Contact Set Mercury is designed to meet or exceed the original equipment specifications, providing peace of mind for boaters.
Performance & Functionality
The Sierra International 185139 Contact Set Mercury performs its job exceptionally well by restoring reliable ignition to older Mercury outboard motors. Its primary function is to open and close the ignition circuit, generating the necessary spark for combustion. The contact set delivers consistent and reliable performance, improving starting, idling, and overall engine operation.
The Sierra International 185139 Contact Set Mercury excels in providing a precise and consistent spark, leading to improved engine performance. However, adjusting the points gap requires some mechanical skill and the use of a feeler gauge. The part meets and exceeds expectations by significantly improving engine reliability.
Design & Ergonomics
The Sierra International 185139 Contact Set Mercury is designed for straightforward installation and reliable operation. The materials used are durable and corrosion-resistant, ensuring long-lasting performance in the marine environment. The contact set is relatively lightweight and compact, fitting easily within the engine’s ignition system.
The Sierra International 185139 Contact Set Mercury is user-friendly for individuals with basic mechanical skills. A service manual or online resources can provide guidance for proper installation and adjustment. The part is designed for easy access and maintenance within the engine.
Durability & Maintenance
With proper maintenance, the Sierra International 185139 Contact Set Mercury should provide years of reliable service. Regular inspection and adjustment of the points gap will ensure optimal performance and extend the lifespan of the contact set. Cleaning the contact points with a points file can remove corrosion and ensure a strong electrical connection.
The Sierra International 185139 Contact Set Mercury is relatively easy to maintain and repair. Replacing the contact set is a simple process that can be performed with basic tools. The durable construction of the part ensures it can withstand the demands of the marine environment.
Accessories and Customization Options
The Sierra International 185139 Contact Set Mercury does not come with any additional accessories beyond the contact set itself. However, it is compatible with standard points files and feeler gauges used for adjusting the points gap. There are no customization options available for this part.
The Sierra International 185139 Contact Set Mercury is designed to work with the original ignition system components of compatible Mercury outboard motors. It does not require any special modifications or additional accessories. The focus is on providing a reliable and direct replacement for the original part.
Pros and Cons of Sierra International 185139 Contact Set Mercury
Pros
- Reliable Performance: Provides consistent spark and improves engine starting and idling.
- Precise Fit: Engineered to match the exact specifications of the original Mercury part.
- Durable Construction: Made from high-quality, corrosion-resistant materials.
- Easy Installation: Straightforward installation process for individuals with basic mechanical skills.
- Cost-Effective: Offers a reasonably priced solution to ignition problems.
Cons
- Requires manual adjustment of points gap, which may be challenging for some users.
- No included accessories (e.g., points file, feeler gauge) require separate purchase if not already owned.
Who Should Buy Sierra International 185139 Contact Set Mercury?
The Sierra International 185139 Contact Set Mercury is perfect for owners of older Mercury outboard motors experiencing ignition problems. It is ideal for boaters who are comfortable performing basic maintenance and repairs on their engines. It’s also a great choice for anyone looking for a reliable and cost-effective replacement for a worn or faulty contact set.
This product might not be suitable for individuals unfamiliar with basic engine maintenance or those who prefer to have a professional mechanic perform all repairs. If you’re not comfortable working on your engine, it’s best to seek professional assistance. Also, if your motor is not listed in the compatiblity list, this is not for you.
Essential accessories include a points file for cleaning the contact points and a feeler gauge for adjusting the points gap. A service manual for your specific Mercury outboard model can also be helpful for proper installation and adjustment procedures. Consider an upgraded condenser to extend ignition life.
Conclusion on Sierra International 185139 Contact Set Mercury
Overall, the Sierra International 185139 Contact Set Mercury is an excellent replacement part that effectively restores reliable ignition to older Mercury outboard motors. Its precise fit, durable construction, and consistent performance make it a worthwhile investment for boaters seeking to maintain their engines. I couldn’t be happier.
The price of $67.79 is justified by the improved engine performance and peace of mind that comes with a reliable ignition system. I would personally recommend the Sierra International 185139 Contact Set Mercury to any boater experiencing ignition problems with their compatible Mercury outboard motor. It brought my old fishing boat back to life.
Don’t let ignition problems keep you off the water. Invest in the Sierra International 185139 Contact Set Mercury and experience the joy of smooth sailing once again. Get yours today and keep that classic Mercury running strong!