Let’s Dive into Sierra International 1845404 Impeller For Nissan/Tohatsu Ns50C/Ns60A/Ns70A2, 2002 & Up
The Sierra International 1845404 Impeller is a vital component for maintaining the cooling system of Nissan/Tohatsu outboard engines, specifically the NS50C, NS60A, and NS70A2 models manufactured from 2002 onwards. Sierra International designed this impeller as a direct replacement for the original equipment manufacturer (OEM) part, ensuring compatibility and reliable performance. This small but crucial component plays a big part in preventing engine overheating and potential damage.
My journey with outboard engines began on the salty coasts of the Pacific Northwest, where reliable equipment is non-negotiable. A failing impeller means a sidelined engine, a missed fishing trip, or worse – a breakdown miles from shore. I needed a replacement for my aging Tohatsu’s impeller; it was showing signs of wear and tear, causing the engine to run hotter than usual.
Out of the box, the Sierra International 1845404 Impeller looks like a solid piece of kit. The rubber feels durable and the dimensions appear precise. Holding it in my hand, it’s clear that Sierra International paid attention to detail.
I considered a few other brands, including OEM Tohatsu impellers and a Mallory version. The Sierra International impeller was chosen for its reputation for quality and availability at a reasonable price point. My first impression was positive; it seemed like a well-made product ready to get my engine back in top shape.
Real-World Testing: Putting Sierra International 1845404 Impeller For Nissan/Tohatsu Ns50C/Ns60A/Ns70A2, 2002 & Up to the Test
First Use Experience
I tested the Sierra International 1845404 Impeller on my Tohatsu NS60A during a salmon fishing trip in Puget Sound. The conditions were typical for the area: cool, damp, and with a moderate chop on the water. Installation was straightforward using my existing shop tools.
The engine ran noticeably cooler after the impeller replacement. I idled for an extended period to test the low-speed cooling capability, and I also ran at various speeds to ensure stable operation. No issues arose during the initial run.
Extended Use & Reliability
After several months of regular use (approximately 50 hours), the Sierra International 1845404 Impeller continues to perform admirably. There are no visible signs of wear or degradation of the rubber material. The engine temperature remains stable and within the expected range.
Cleaning the impeller housing and inspecting the impeller is a part of my regular maintenance schedule. It’s a relatively simple task, requiring only basic hand tools and some marine grease. Compared to the previous impeller, which showed cracking and deformation, this one appears significantly more robust.
Breaking Down the Features of Sierra International 1845404 Impeller For Nissan/Tohatsu Ns50C/Ns60A/Ns70A2, 2002 & Up
Specifications
The Sierra International 1845404 Impeller is specifically designed as a replacement impeller for Nissan/Tohatsu NS50C, NS60A, and NS70A2 outboard engines manufactured from 2002 onwards. This ensures proper fit and function within the specified engine models.
It is interchangeable with Nissan/Tohatsu part number 353650210M and Mallory part number 9-45404. This provides boat owners with alternative part numbers to verify compatibility, expanding options for sourcing the correct impeller.
The impeller is constructed from a durable rubber compound designed to withstand the harsh marine environment. The rubber’s formulation ensures resistance to saltwater, UV exposure, and the stresses of high-speed rotation within the water pump.
It includes a single impeller unit per package. This offers a straightforward replacement solution for boat owners needing to replace their worn or damaged impeller.
Each Sierra International product is engineered to meet or exceed the original equipment manufacturer (OEM) specifications. This promises performance that is equal to or better than the original impeller, ensuring reliability and longevity.
Performance & Functionality
The Sierra International 1845404 Impeller efficiently pumps water through the engine’s cooling system. The engine maintains optimal operating temperatures even under heavy load. The improved water flow provided by the new impeller has extended the periods between needed maintenance to flush my engine.
There is no noticeable cavitation or loss of pumping efficiency at high RPMs. The impeller has been working as expected. The impeller has met and exceeded my expectations.
Design & Ergonomics
The build quality of the Sierra International 1845404 Impeller is excellent. The rubber compound feels dense and resistant to tearing. The precision molding ensures a proper fit within the water pump housing.
The design is straightforward, mirroring the OEM impeller. Installation is user-friendly, requiring no specialized tools or modifications.
Durability & Maintenance
The Sierra International 1845404 Impeller is expected to last for several seasons of regular use with proper maintenance. Regular inspection and replacement every 1-2 years, depending on usage, is recommended to prevent engine overheating. Maintaining the pump housing and lubricating the impeller during installation will extend its life.
Replacing the impeller is a relatively simple task that can be performed by most boat owners with basic mechanical skills. Accessing the water pump housing and removing the old impeller is the most difficult aspect of the process.
Accessories and Customization Options
The Sierra International 1845404 Impeller comes as a standalone replacement part. No additional accessories are included in the package, and no customization options are directly available for the impeller itself. Some boat owners might consider using different types of marine grease during installation for added protection.
The impeller is designed to work seamlessly with the existing water pump housing and cooling system components of the specified Nissan/Tohatsu engines. It’s compatible with aftermarket water pump repair kits containing seals and gaskets for a more comprehensive overhaul.
Pros and Cons of Sierra International 1845404 Impeller For Nissan/Tohatsu Ns50C/Ns60A/Ns70A2, 2002 & Up
Pros
- Direct OEM replacement ensures easy installation and proper fit.
- Durable rubber construction resists wear and tear in the marine environment.
- Effective water pumping maintains optimal engine operating temperatures.
- Affordable price point compared to OEM parts.
- Readily available from various retailers and online vendors.
Cons
- Requires periodic replacement as part of routine engine maintenance.
- No included installation instructions (though readily available online).
Who Should Buy Sierra International 1845404 Impeller For Nissan/Tohatsu Ns50C/Ns60A/Ns70A2, 2002 & Up?
This impeller is perfect for boat owners who own a Nissan/Tohatsu NS50C, NS60A, or NS70A2 outboard engine (2002 & Up) and perform their own routine maintenance. It’s also ideal for professional marine mechanics looking for a reliable and cost-effective replacement part. Anyone wanting to maintain the reliability of their outboard engine should purchase this impeller.
If you are uncomfortable performing basic mechanical repairs or prefer to rely solely on OEM parts, you might want to consider having a professional install the impeller, or purchasing a Tohatsu-branded impeller. If you are a boat owner with a different make and model of outboard engine, this impeller will not be compatible.
While not strictly necessary, having a service manual for your specific engine model, marine grease, and a new water pump gasket will make the impeller replacement process smoother. Consider purchasing a complete water pump repair kit for a more comprehensive service.
Conclusion on Sierra International 1845404 Impeller For Nissan/Tohatsu Ns50C/Ns60A/Ns70A2, 2002 & Up
The Sierra International 1845404 Impeller is a reliable and cost-effective replacement part that delivers excellent performance. Its durable construction and precise fit make it a worthy alternative to OEM impellers. The price is justified considering the protection it provides to the engine.
I wholeheartedly recommend this impeller to anyone needing to replace the worn impeller on their Nissan/Tohatsu outboard engine. Don’t wait until your engine overheats and leaves you stranded; proactively replace your impeller with the Sierra International 1845404, and enjoy worry-free boating!