MARINER Freshwater Rh 10-3/8X13 13-SPLINE 48-73136A40

( Brand: Mariner ), ( Manufacturer Part Number: 48-73136 ), ( Part Type: Aluminum ), ( Country Of Origin: United States )

Review MARINER Freshwater Mercury 10-3/8x13 Rh 13-spline Aluminum

The **Mariner 48-73136 Freshwater Mercury 10-3/8" x 13" RH (Right-Hand) 48-Spline Propeller** is a high-performance, precision-engineered propeller designed specifically for freshwater applications, offering an optimal balance of efficiency, durability, and versatility for a wide range of recreational and performance boats. Crafted from high-grade aluminum alloy, this propeller is built to withstand the demands of daily use while delivering exceptional thrust and fuel economy, making it an ideal choice for anglers, wakeboarders, and boaters seeking reliable performance. With a **10-3/8-inch diameter** and a **13-inch pitch**, this propeller strikes a perfect middle ground between speed and torque, ensuring smooth acceleration, responsive handling, and minimal strain on the engine whether cruising at leisurely speeds or engaging in high-performance maneuvers. The **right-hand rotation (RH)** design ensures seamless compatibility with most outboard motors, allowing for optimal power transfer and efficient water displacement.

The **48-spline shaft connection** provides enhanced strength and rigidity, reducing the risk of vibration and wear while maintaining a secure, vibration-dampening fit. This feature is particularly beneficial for extended use, as it minimizes stress on the engine s internal components, contributing to longer engine life and reduced maintenance requirements. The propeller s **freshwater-specific design** includes a slightly more aggressive blade contour compared to saltwater models, allowing it to handle the denser, cooler water conditions found in lakes, rivers, and reservoirs with greater efficiency. This results in improved fuel savings and reduced wear on the motor, making it a cost-effective choice for boaters who prioritize both performance and longevity.

Constructed with **Mariner s proprietary blade technology**, this propeller features a **hydrodynamic blade shape** that minimizes cavitation and drag, ensuring consistent power delivery even at higher RPMs. The **smooth, polished finish** not only enhances aesthetic appeal but also reduces friction, allowing the propeller to cut through the water with minimal resistance. Additionally, the **reinforced blade tips** provide added durability against debris, ice, or accidental contact with docks or underwater obstacles, making this propeller well-suited for both calm and slightly choppy freshwater environments. Whether used on a mid-sized bass boat, a family-friendly pontoon, or a high-performance wakeboard rig, the **Mariner 48-73136** delivers a seamless blend of power, efficiency, and reliability, ensuring an enjoyable and hassle-free boating experience.

For boaters who demand precision and performance without compromising on build quality, this propeller stands out as a **versatile workhorse** capable of handling everything from gentle cruising to spirited wakeboarding sessions. Its **universal compatibility** with Mercury outboards (and many other brands with proper adapter plates) makes it a practical upgrade for those looking to optimize their boat s handling characteristics. With proper maintenance such as regular cleaning to prevent corrosion and periodic inspections for blade damage the **Mariner 48-73136** will continue to perform at its best for seasons to come, reinforcing its reputation as a dependable choice for freshwater enthusiasts.

### **Pros and Cons of buying a Mercury 10.3/8" x 13" RH 13-Spline Propeller (Part #48-73136A40)**

1. **Performance Optimization for Freshwater Use** This propeller is specifically designed for freshwater applications, which means it is optimized for lower resistance and better efficiency in water with less salt content. This can lead to improved speed and fuel economy compared to a marine-grade propeller.

2. **High Efficiency at Mid-RPM Range** The 13-spline design and blade pitch (10.3/8") suggest it is well-suited for moderate to high-speed cruising, making it ideal for boats that spend most of their time at sustained speeds rather than trolling or slow-speed maneuvering.

3. **Durability for Freshwater Environments** Since it is labeled for freshwater use, it may be less prone to corrosion from saltwater, which could extend its lifespan if used exclusively in freshwater.

4. **Compatibility with Mercury Outboards** This propeller is designed to work seamlessly with Mercury outboards, ensuring proper alignment and performance. It is likely to fit well on the 48-73136 model line, which is common in mid-sized freshwater boats.

5. **Cost-Effective Replacement** As a standard replacement propeller, it is likely more affordable than custom or high-performance options, making it a practical choice for budget-conscious boat owners.

6. **Easy Installation** The 13-spline shaft connection is standard for many Mercury outboards, and the propeller is likely designed for straightforward installation without requiring specialized tools.

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1. **Not Suitable for Saltwater** The "freshwater" designation means it is not built to withstand the corrosive effects of saltwater. Using it in saltwater could lead to premature wear, pitting, or failure, voiding any warranties.

2. **Limited Performance in Rough Conditions** If the boat operates frequently in rough water, waves, or heavy loads, this propeller may not handle the stress as well as a more robust marine-grade option. It could be prone to bending or damage under extreme conditions.

3. **Potential for Reduced Lifespan** Freshwater propellers are generally less durable than marine-grade ones, which are designed with corrosion-resistant materials. If the boat is used in brackish water or occasionally in saltwater, the propeller may degrade faster.

4. **May Not Be Ideal for Trolling or Slow Speeds** The 10.3/8" pitch suggests it is optimized for cruising speeds rather than slow-speed trolling. If the boat requires frequent low-speed operation (e.g., fishing near shore), this propeller might not provide the best efficiency or control.

5. **Limited Customization Options** Unlike custom propellers, this is a standard replacement part. If the boat s performance could be improved with a different pitch or blade design, this propeller may not offer that flexibility.

6. **Potential for Cavitation or Vibration** If the boat operates at high loads or speeds, the propeller s design might lead to cavitation (bubble formation that can erode the blades) or excessive vibration, which could affect comfort and longevity.

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### **Conclusion and Recommendation**

The **Mercury 10.3/8" x 13" RH 13-Spline Freshwater Propeller (48-73136A40)** is a solid choice for boat owners who operate **exclusively in freshwater** and prioritize **cruising performance, efficiency, and affordability**. It is well-suited for mid-sized boats that spend most of their time at moderate to high speeds, such as lake cruisers, fishing boats, or utility vessels.

However, if the boat is used in **saltwater, brackish water, or rough conditions**, this propeller is **not recommended** due to its lack of corrosion resistance and potential for premature wear. In such cases, a **marine-grade propeller** (e.g., a Mercury or Bronco saltwater model) would be a better long-term investment.

If the boat s primary use involves **trolling, slow-speed maneuvering, or heavy loads**, this propeller may not provide the best performance, and a **lower-pitch or custom propeller** might be more appropriate.

- **Buy it if:** You use the boat **only in freshwater**, want a **cost-effective, efficient cruising propeller**, and do not operate at extreme speeds or loads.

- **Avoid it if:** The boat is used in **saltwater, rough conditions, or requires frequent slow-speed operation**. In those cases, invest in a **marine-grade propeller** or consult a marine mechanic to select a better-matched option.

Details:

Parts removed from freshwater 1984 Mercury 50HP s/n 6486497.

part #: 4873136 prices

• $26.99-$59.00

specifications ouboaen:

• for makes: Mercury
• brand: Mariner
• mpn: 48-73136
• part type: Aluminum
• country of origin: United States

offer ouboaen:

• options: Ship-to-home
• quantity: 1
• best offers: True
• availability: In Stock
• sold: 0
• started: May 15, 2026

payments ouboaen:

• wallet: Paypal
• other
• credit card: Mastercard

seller ouboaen:

• rating: 100.0%
• city: Overland Park, Kansas
• # reviews: 687

shipping ouboaen:

• service: Standard
• transit: 4-8 Days
• type: Fixed
• class: Standard
• cost: $0.00

returns ouboaen:

• policy: Returns Accepted
• paid by: Buyer
• time: 14 Days

general ouboaen:

• condition: Used
• Boat Parts > Outboard Engines Components > Other

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