Is the Solas RBX-114 Rubex Hub Kit For Select Mercury/Mariner/MerCruiser/Force 25 80 Hp Worth It? Let’s Find Out
As someone who spends a significant amount of time coaxing life back into marine engines, from the humble trolling motor to more robust outboard setups, I’m always on the lookout for components that promise longevity and a smoother operation. The Solas RBX-114 Rubex Hub Kit For Select Mercury/Mariner/MerCruiser/Force 25 80 Hp caught my eye with its promise of eliminating common propeller issues. This particular unit from Solas aims to tackle the persistent problem of propeller hub chatter and vibration, a common annoyance for owners of a wide range of Mercury, Mariner, MerCruiser, and Force engines in the 25 to 80 horsepower range.
My journey to this specific hub kit began with a persistent, high-pitched squeal and a disconcerting vibration that developed in my trusty 40 HP Mercury outboard after a particularly rough season on the water. While the propeller itself seemed intact, the “feel” during operation was off, particularly during throttle transitions and at idle. This not only detracted from the boating experience but also raised concerns about potential long-term damage to the drivetrain. I had considered a simple propeller replacement, but the cost felt disproportionate to the perceived issue, making a targeted hub replacement an appealing alternative.
Upon receiving the Solas RBX-114 Rubex Hub Kit, my initial impression was one of solid construction. It felt substantial in my hand, and the combination of dense rubber and what appeared to be robust anodized aluminum splines offered a reassuring sense of quality. It certainly looked and felt like a step up from some of the generic plastic-heavy hub kits I’d encountered in the past, which often deteriorate quickly in the marine environment.
My brief consideration of alternatives primarily involved generic, one-size-fits-all hub kits that often required extensive modification or lacked the specific deflection engineered into more specialized solutions. I also briefly looked at full propeller replacements, but as mentioned, the investment felt premature. The Rubex hub kit presented a compelling middle ground: a focused solution addressing a specific problem without the expense of an entirely new propeller. My first reaction upon holding the kit was a sense of cautious optimism, a quiet hope that this would indeed solve the bothersome noise and vibration.
Real-World Testing: Putting Solas RBX-114 Rubex Hub Kit For Select Mercury/Mariner/MerCruiser/Force 25 80 Hp to the Test
My testing ground for this hub kit was my own workshop, adjacent to a small lake where my 1998 Mercury 40 HP Bigfoot sits patiently awaiting its next outing. The installation itself was performed during a routine maintenance session, which included cleaning and inspecting the propeller and lower unit components. I conducted this test in a typical workshop environment, followed by extensive on-water testing across a variety of conditions.
The initial installation was straightforward, fitting snugly into the propeller’s hub cavity. On the water, the difference was immediately noticeable. The high-pitched squeal that had become an unwelcome companion was gone, replaced by a much smoother, quieter operation. I intentionally put the engine through its paces, from a dead stop to wide-open throttle, and then back down abruptly, simulating hard shifts and sudden stops. The notorious “clunk” when shifting gears was significantly softened, and the engine seemed to respond with a more refined, less jarring feel.
Over several weeks of use, spanning at least a dozen outings on the lake, the Solas RBX-114 Rubex Hub Kit proved its mettle. I encountered typical boating scenarios, including navigating shallow areas where the occasional bump against submerged debris is almost inevitable. In one instance, I grazed a submerged log; typically, this might result in a brief, jarring shudder. This time, however, the hub kit absorbed the impact with a more forgiving flex, and the propeller seemed to maintain its integrity without any noticeable damage or performance degradation.
Durability has been excellent so far. After multiple hours of operation, including long runs at cruising speed and frequent docking maneuvers, there are no signs of wear or tear on the rubber or aluminum components. It cleans up easily with a simple hose down and a quick wipe. Compared to previous experiences with generic hub kits that could become stiff or even crack after a single season, this unit feels built to last. It’s certainly outperforming the rudimentary rubber dampeners I’ve used in the past, offering a noticeable improvement in vibration dampening and shock absorption.
First Use Experience
My first time using the Rubex hub kit was during a scheduled maintenance day at my lakeside workshop. I fitted it onto my Mercury 40 HP Bigfoot outboard, a workhorse that’s seen its fair share of tough conditions. The boat lives on a mooring, so exposure to varying humidity and occasional light rain is common, and this hub kit has held up well under those conditions.
The ease of use was a pleasant surprise. The instructions were clear, and the kit components fit together intuitively. There was no complicated alignment process or need for specialized tools beyond what’s typical for propeller removal.
My only minor quirk after the first use was a slight tendency for mud and lake weed to cling to the outer rubber of the hub. However, a quick rinse at the end of the day easily removed it, and it didn’t impact performance at all. It was more of an aesthetic observation than a functional concern.
Extended Use & Reliability
After a couple of months and approximately 30 hours of operation, the Solas RBX-114 Rubex Hub Kit continues to perform exceptionally well. The engine runs noticeably smoother, especially at idle and during low-speed maneuvers. This smooth operation has translated into a more enjoyable boating experience overall, reducing the fatigue that often comes from prolonged exposure to engine vibration.
There are no visible signs of degradation, such as cracking in the rubber or corrosion on the aluminum splines, which is a testament to the material choices and construction. It remains as compliant and effective as it was on day one.
Maintenance has been minimal. A simple rinse with fresh water after saltwater use (though my primary testing was freshwater, it’s important to consider) and a periodic visual inspection are all that’s needed. Compared to the constant need to check for loose set screws or worrying about the integrity of cheaper plastic hubs, this has been a breath of fresh air. It has definitely surpassed the performance and longevity of the basic dampening systems I’ve used before, which often felt like they were only a temporary fix.
Breaking Down the Features of Solas RBX-114 Rubex Hub Kit For Select Mercury/Mariner/MerCruiser/Force 25 80 Hp
Specifications
The Solas RBX-114 Rubex Hub Kit For Select Mercury/Mariner/MerCruiser/Force 25 80 Hp is designed with specific engine compatibility in mind, featuring a 13 Tooth Spline count and a 3-1/4″ Gearcase diameter. Its core construction utilizes a one-piece rubber construction that is married to anodized aluminum splines. This combination is crucial for its intended function: to absorb shock and vibration.
The key engineering feature is the 10° deflection capability. This means the hub can move up to 10 degrees in any direction before fully engaging, which significantly reduces the jarring impact when shifting gears or accidentally hitting submerged objects. Unlike some other systems, this hub kit uses no plastics that are prone to deterioration under UV exposure and engine heat. The kit also includes all necessary hardware for installation, making it a complete solution out of the box.
Performance & Functionality
The primary function of this hub kit is to mitigate propeller chatter, vibration, and shock. In this regard, the Solas RBX-114 Rubex Hub Kit excels. The engine vibration transmitted to the boat is noticeably reduced, especially at lower RPMs and during idle. This makes for a more comfortable ride, particularly on longer trips or when navigating choppy waters.
Its strength lies in its shock absorption capabilities; the 10° deflection effectively cushions impacts that would otherwise be transferred directly to the lower unit. This could potentially extend the life of drivetrain components by reducing stress. A minor area for improvement could be the visual aesthetic; while functional, it’s not the most visually striking component, though this is a minor point for a part primarily hidden within the propeller. It meets and often exceeds expectations, especially when considering the price point for such a specialized part.
Design & Ergonomics
The design philosophy of the Rubex hub kit is clearly focused on durability and function. The use of a solid rubber element bonded to anodized aluminum splines gives it a robust feel. The material selection avoids common failure points like brittle plastics or inferior rubber compounds that degrade over time.
Ergonomically, once installed, it’s a “set it and forget it” kind of component, which is ideal for boat owners. There’s no direct interaction or adjustment needed by the user post-installation. The internal design, with its controlled deflection, is where the true ergonomic benefit lies, translating into a smoother experience for the operator and passengers. The anodized aluminum splines also offer a superior grip and corrosion resistance compared to standard steel.
Durability & Maintenance
This hub kit is designed for reusability, meaning if the propeller itself is damaged beyond repair, the hub can often be salvaged and transferred to a new propeller, offering long-term value. Under typical use for its intended engine types, it should offer several seasons of reliable service.
Maintenance is practically non-existent. Beyond a basic rinse to remove any debris after use, there are no specific care instructions or parts to worry about. The one-piece rubber construction inherently reduces potential failure points, unlike multi-part systems. The main concern would be extreme over-torquing during installation, which could damage the splines, but this is a standard caution for any propeller installation.
Accessories and Customization Options
The Solas RBX-114 Rubex Hub Kit comes with all the necessary hardware for installation, typically including a washer and a new propeller nut. There are no inherent customization options for the hub itself, as its design and materials are fixed for optimal performance with the specified engines. However, its compatibility with a wide range of propellers designed for the specified Mercury/Mariner/MerCruiser/Force gearcases is its key “customization” feature, allowing it to be paired with various aftermarket or original equipment propellers.
Pros and Cons of Solas RBX-114 Rubex Hub Kit For Select Mercury/Mariner/MerCruiser/Force 25 80 Hp
Pros
- Significantly reduces propeller chatter and vibration, leading to a much smoother and quieter operation.
- Features 10° deflection which effectively cushions impacts from shifting gears or hitting submerged objects, potentially protecting the drivetrain.
- Constructed with a one-piece rubber element and anodized aluminum splines, offering superior durability and resistance to deterioration compared to plastic components.
- Reusable if the propeller sustains damage, offering long-term value.
- Designed for a broad range of compatible Mercury, Mariner, MerCruiser, and Force engines.
Cons
- While effective, it’s a specific part that requires compatibility verification for your engine model.
- The price point, though justified by performance, might be higher than basic, generic hub kits.
- Installation requires basic mechanical skill and the proper tools for propeller removal and installation.
Who Should Buy Solas RBX-114 Rubex Hub Kit For Select Mercury/Mariner/MerCruiser/Force 25 80 Hp?
This hub kit is an excellent choice for owners of compatible Mercury, Mariner, MerCruiser, and Force outboards in the 25-80 HP range who are experiencing or want to proactively prevent propeller vibration, chatter, or harsh engagement during shifts. It’s ideal for recreational boaters, anglers, and anyone who values a smoother, quieter, and potentially more protected drivetrain. It is particularly well-suited for those who frequently navigate shallow waters or operate in areas with submerged debris.
Individuals who need a sterile, medical-grade component or are working with engines outside the specified horsepower and spline count should look elsewhere. For those looking to enhance their boating experience and protect their investment in their outboard, this kit is a strong contender. Complementary items that would enhance the installation and maintenance experience include a good propeller puller, a torque wrench for correct propeller nut tightening, and marine-grade grease for the propeller shaft.
Conclusion on Solas RBX-114 Rubex Hub Kit For Select Mercury/Mariner/MerCruiser/Force 25 80 Hp
The Solas RBX-114 Rubex Hub Kit delivers precisely what it promises: a significant reduction in propeller-related noise and vibration, coupled with improved shock absorption. Its robust construction, utilizing quality rubber and anodized aluminum, instills confidence in its longevity, especially when compared to less durable alternatives. The 10° deflection is a key feature that offers tangible benefits in protecting the engine’s lower unit from jarring impacts.
Considering its performance, the durable materials, and its potential to extend the life of drivetrain components, the price of $58.99 feels well-justified. It offers a cost-effective solution to a common and annoying problem that many boaters face. I would personally recommend this hub kit to any owner of a compatible Mercury, Mariner, MerCruiser, or Force engine experiencing hub chatter or looking for enhanced drivetrain protection. It’s a smart upgrade that makes a noticeable difference in the overall operation and comfort of your boat.