MERCURY 48-5245-28 Outboard Racing Propeller Blade Spline Rh 48-52450-28 12X28P

( Manufacturer Part Number: 48-5245-28 ), ( Part Type: Propeller Blade ), ( Propeller Rotation: Standard ), ( Country Of Origin: United States )

Review MERCURY Outboard Racing Propeller #48-52450-28 Blade Spline Rh fits SS 2015

The **Mercury 48-5245-28 Outboard Racing Propeller** is a high-performance, precision-engineered marine propeller designed specifically for competitive racing applications, delivering unmatched efficiency, speed, and control in demanding conditions. This **4-blade, 12x28P** unit features a **15-spline shaft connection**, ensuring a secure and vibration-dampening fit that maximizes power transfer from the engine to the water while minimizing stress on the drivetrain. Crafted from **high-grade, corrosion-resistant materials**, the propeller blades are precision-machined to an exacting standard, optimizing hydrodynamic flow for reduced drag and improved thrust. The **28-pitch** design balances acceleration and top-end speed, making it ideal for boats competing in slalom, sprint, or endurance racing where quick response and sustained velocity are critical. The **racing-grade blade profile** incorporates sharp, aerodynamic contours that minimize turbulence and cavitation, allowing the outboard to maintain peak efficiency even at high RPMs. Whether deployed on a high-performance center console, ski boat, or racing yacht, this propeller is engineered to push the limits of speed and handling, giving drivers the edge they need to dominate the racecourse. Built to withstand the rigors of competitive use, it combines durability with razor-sharp performance, ensuring reliability when it matters most.

### **Pros and Cons of buying a Mercury 48-5245-28 Outboard Racing Propeller (12x28P, 15 Spline, RH)**

1. **Performance Optimization** This is a high-performance racing propeller designed for speed and efficiency. The 12x28 pitch ratio (12-inch diameter, 28-inch pitch) is ideal for high-RPM applications, making it suitable for boats that require maximum thrust and acceleration.

2. **Durability and Strength** Mercury outboards are known for their robust construction, and racing propellers are typically made from high-grade stainless steel or aluminum alloys, ensuring longevity even under heavy loads.

3. **Precision Engineering** Racing propellers are finely tuned for optimal performance, reducing cavitation and improving fuel efficiency compared to standard propellers.

4. **Compatibility with High-Performance Engines** The 15-spline shaft connection ensures a secure fit for Mercury outboards, reducing slippage and improving power transfer.

5. **Customizable for Different Conditions** The 12x28P design can be adjusted (if possible) for different load conditions, making it versatile for racing, towing, or general high-speed use.

6. **Brand Reliability** Mercury is a trusted name in marine propulsion, offering warranties and customer support for aftermarket parts.

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1. **Cost** Racing propellers are significantly more expensive than standard propellers due to their specialized design and materials. This may not be cost-effective for casual boaters.

2. **Limited Use Cases** While excellent for racing, this propeller may not be ideal for heavy-duty tasks like deep-sea fishing or towing large loads, where a more aggressive pitch (e.g., 14x24P) might be better.

3. **Potential for Wear** Racing propellers experience higher stress and may wear out faster than standard propellers, especially if used in rough conditions or with improper maintenance.

4. **Installation Complexity** Some high-performance propellers require precise alignment and may need professional installation to ensure optimal performance.

5. **Not Universal** The 15-spline shaft connection is specific to certain Mercury outboards. If the boat s engine doesn t match, compatibility issues may arise.

6. **Maintenance Requirements** Racing propellers may require more frequent inspections for pitting, corrosion, or blade damage due to their aggressive use.

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The **Mercury 48-5245-28 racing propeller** is an excellent choice for **high-performance racing applications** where speed, efficiency, and precision are prioritized. It delivers superior acceleration and handling compared to standard propellers but comes at a higher cost and may not be suitable for all boating needs.

If you primarily use your boat for **racing, speed trials, or high-speed cruising**, this propeller is a strong investment. However, if your primary use involves **towing, deep-sea fishing, or general utility**, a more versatile propeller (e.g., a 14x24P or 13x26P) may be a better long-term choice.

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- **Buy it if:** You race frequently, prioritize speed over fuel efficiency, and have a Mercury outboard compatible with the 15-spline shaft.

- **Consider alternatives if:** You need a propeller for mixed-use (racing and utility) or want a more cost-effective option.

- **Pair with:** A **high-performance marine drive** and **regular maintenance** to maximize longevity.

For best results, consult a **marine mechanic or propeller specialist** to ensure proper installation and tuning for your specific boat and engine setup.

Details:

Please look at pictures under the Zoom feature to determine value and condition for yourself. Spline end 1 ID Opposite 1-1/4 Hub length is pictured. The propeller is right-hand rotation. As pictures show, the propeller is in decent used condition, showing some leading edge wear.

part #: 48524528 prices

• $275.97-$625.00

specifications propboapar:

• for models: Ss
• for makes: Mercury
• for years: 2015
• mpn: 48-5245-28
• part type: Propeller Blade
• propeller rotation: Standard
• country of origin: United States

returns propboapar:

• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

general propboapar:

• condition: Used
• Parts Accessories > Boat Parts > Propellers

payments propboapar:

• credit card: Discover
• wallet: Paypal
• other

seller propboapar:

• rating: 100.0%
• # reviews: 2286
• city: Lake Alfred, Florida

offer propboapar:

• started: February 17, 2026
• best offers: True
• sold: 0
• options: Ship-to-home
• quantity: 1
• availability: In Stock

shipping propboapar:

• type: Calculated
• service: USPS Ground Advantage
• transit: 4-10 Days
• cost: $12.94
• carrier: USPS
• class: Standard

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