Rubex NS3 (13 x 21″) Solas RH Propeller, 9431-130-21

Introduction

The Rubex NS3 (13 x 21″) Solas RH Propeller, 9431-130-21 is a top-tier, stainless steel propeller engineered for exceptional marine performance. Designed for outboard motors, this high-rake, three-blade propeller enhances acceleration, grip, and overall handling—making it the perfect solution for boaters seeking reliable power and precision on the water. Whether you operate a recreational, fishing, or performance boat, this propeller promises improved fuel efficiency, better throttle response, and outstanding top-end speed.

Manufactured by Solas, a leader in marine propulsion, the NS3 13×21 propeller utilizes premium stainless steel construction and a Rubex interchangeable hub system for seamless installation and long-term durability. The 21-inch pitch is particularly well-suited for boaters who need more speed while maintaining engine RPM in the optimal range. If you’re ready to elevate your marine propulsion game, the Rubex NS3 (13 x 21″) is a powerful and cost-effective choice.

Overview / What Is Rubex NS3 (13 x 21″) Solas RH Propeller?

The Rubex NS3 13×21 Solas RH Propeller is a high-performance marine component designed for outboard motors from major manufacturers such as Yamaha, Honda, Mercury, and Suzuki. With a 13-inch diameter and 21-inch pitch, this right-hand rotating propeller is tailored for higher-speed applications where efficient top-end performance is critical.

This stainless steel propeller features a progressive rake design and excellent blade geometry for strong mid-range thrust, better lift, and enhanced control. The use of the Rubex interchangeable hub system also allows this propeller to reduce vibration and protect the drivetrain, making it a top choice for both professional and recreational marine operators.

Top Benefits of Choosing the Rubex NS3 13×21 Marine Propeller

• High-Performance Design: Engineered for better handling and higher top speeds
• Stainless Steel Construction: Enhanced strength and corrosion resistance
• Interchangeable Hub System: Rubex hub allows easy fit and vibration reduction
• Wide Compatibility: Fits Yamaha, Mercury, Honda, and Suzuki outboards with proper hub kits
• Fuel Efficiency: Reduces slippage and improves engine efficiency

The Rubex NS3 13×21 marine propeller is ideal for boaters looking for durability, efficiency, and long-term reliability in a variety of marine conditions.

How to Install Rubex NS3 (13 x 21″) Solas RH Propeller

Installing the Rubex NS3 13×21 is straightforward thanks to its user-friendly interchangeable hub system. To begin, safely remove your current propeller using a prop wrench and retain the hardware. Clean the propeller shaft thoroughly before sliding in the Rubex hub kit. Once inserted, mount the propeller, add the thrust washer, and torque the nut according to your engine manufacturer’s guidelines.

Always finish by installing the cotter pin or locking tab and ensure the propeller spins freely without interference. For first-timers, the instruction guide included with the hub kit provides step-by-step clarity. Proper installation is crucial for optimal performance and safety.

When to Choose a 21-Pitch Propeller for Marine Use

A 21-pitch propeller like the Rubex NS3 (13 x 21″) is ideal for lighter boats and higher-speed cruising. This pitch helps reduce engine RPM at higher speeds, improving fuel efficiency and reducing wear. It’s best for boats that already have sufficient low-end torque and can handle the longer pitch without struggling during hole shots or acceleration.

Use this propeller if you’ve already tested lower pitches (17–19″) and found the engine RPMs to be too high or if you’re running at max RPM too quickly. The 21-pitch prop can balance your engine’s performance curve while boosting top-end speed.

Maintenance Tips

To keep your Rubex NS3 13×21 propeller running smoothly for years to come, regular maintenance is essential. Start by visually inspecting the propeller before and after each boating trip for signs of wear, cracks, or entanglements. Fishing lines wrapped around the shaft can damage the propeller seals and should be removed immediately.

Other important maintenance tips include:

• Freshwater Rinse: Always rinse the propeller after saltwater use to avoid corrosion buildup.
• Lubrication: Reapply marine grease on the prop shaft every few months to prevent seizing.
• Blade Alignment: If you notice vibration, check for bent blades and replace the propeller if needed.
• Torque Check: Inspect and retorque the prop nut seasonally to ensure safety and stability.

Proper care extends the life of your propeller and protects your entire propulsion system.

Expert Advice and Pro Recommendations

Marine experts frequently recommend the Rubex NS3 (13 x 21″) Solas RH Propeller for its balance of power, speed, and fuel efficiency. It’s particularly beneficial for boaters who want to reduce engine RPMs without sacrificing performance. The stainless steel build handles higher torque levels and is more impact-resistant than aluminum options, making it a smart choice for frequent boaters.

Professionals also emphasize the value of the Rubex interchangeable hub system, which allows for quick prop swaps and reduces drivetrain shock. Pair this prop with premium marine grease and regularly scheduled inspections to maximize performance and safety on the water.

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Detailed FAQ Section

What outboard engines are compatible with the Rubex NS3 13×21 propeller?

The Rubex NS3 13×21 is compatible with most outboard engines between 60HP and 140HP, including brands such as Yamaha, Mercury, Suzuki, and Honda. Each brand may require a different Rubex hub kit for installation, but once equipped, the propeller offers a seamless and secure fit. Before purchasing, verify your engine shaft specifications and gear ratio to ensure the 21-pitch is appropriate for your boat’s load and usage.

How do I choose between a 19-pitch and 21-pitch Rubex NS3 propeller?

Pitch affects your boat’s acceleration and top speed. A 19-pitch propeller gives faster acceleration but may limit top-end speed, while a 21-pitch propeller like the NS3 13×21 provides better speed at lower RPMs. Choose the 21-pitch if you often cruise at higher speeds or want better fuel economy. Use a tachometer to confirm that your engine stays within the manufacturer’s recommended RPM range with the propeller in use.

Can I install the Rubex NS3 propeller at home?

Yes, installing the Rubex NS3 is a DIY-friendly process. With the help of a Rubex hub kit and a basic propeller wrench, most boaters can install this propeller in under 30 minutes. The key is to follow torque specifications and safety steps like greasing the shaft and securing the cotter pin. If you’re unsure about the hub fit or experience vibration, consult a marine technician for proper installation guidance.

What are the advantages of stainless steel over aluminum in propellers?

Stainless steel propellers offer increased strength, better resistance to corrosion, and less blade flex compared to aluminum propellers. The result is better acceleration, top-end speed, and overall efficiency. Stainless steel is also more durable in rocky or debris-filled waters, reducing the chances of damage during shallow-water operation. While the cost is higher upfront, the lifespan and performance benefits often outweigh the initial investment.

Is the Rubex NS3 13×21 propeller backed by warranty?

Yes, Solas provides a limited warranty on its Rubex NS3 stainless steel propellers. The warranty typically covers manufacturing defects in materials and workmanship, provided the propeller is used in accordance with the manufacturer’s guidelines. Damage from improper installation, collisions, or alterations is generally excluded. Be sure to register your purchase and retain receipts for a smoother claims process.

Conclusion

The Rubex NS3 (13 x 21″) Solas RH Propeller, 9431-130-21 is a marine-grade, stainless steel propeller crafted for top-tier performance, smooth handling, and long-lasting durability. Its 21-inch pitch is ideal for high-speed cruising, fuel savings, and precise throttle control. With broad engine compatibility, easy installation via the Rubex hub system, and Solas’ trusted engineering, this propeller represents an excellent upgrade for discerning boaters.

Don’t settle for an underperforming prop—upgrade your outboard’s efficiency and power with the Rubex NS3 13×21. Your boat—and your wallet—will thank you.

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For more helpful marine maintenance guides, check out our article on Rubex L3 Plus (15.625 x 23″) Solas RH Propeller, 9571-156-23.