MERCURY 48-825942A4 Rh Steel Blade Prop Pitch 13.75

( Manufacturer Part Number: 48-825942A4 ), ( Part Type: Blade Prop ), ( Propeller Rotation: Standard )

Review MERCURY Plus Rh Stainless Steel Blade Prop 13.75 Pitch fits TROPHY 2025

The **Mercury 48-825942-A4 Trophy RH Steel Blade Prop** is a meticulously engineered, high-performance propeller designed for marine applications where precision, durability, and efficiency are paramount. Crafted from high-grade steel, this propeller features a robust **13.75-inch diameter** and a **25-pitch**, making it an ideal choice for medium-sized boats, personal watercraft, or small to mid-sized fishing vessels. The **right-hand (RH) rotation** ensures optimal thrust and torque characteristics, aligning seamlessly with most standard marine engines, whether two-stroke or four-stroke. The **trophy-grade construction** indicates a premium build quality, with a **steel blade** that resists corrosion, bending, and wear, even under demanding conditions such as rough waters, frequent launches, or heavy loads. Each blade is precision-machined to minimize cavitation and maximize hydrodynamic efficiency, reducing fuel consumption while delivering consistent power output. The **propeller s balanced design** minimizes vibration, enhancing both ride comfort and long-term reliability. Whether used for recreational boating, fishing, or light duty towing, this propeller combines strength, performance, and longevity, making it a dependable investment for boat owners seeking both durability and optimal propulsion.

### Pros and Cons of buying a Mercury 48-825942-A4 Trophy RH Steel Blade Prop (13.75" x 25 Pitch)

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1. **Durability and Build Quality** Mercury is a well-known brand in the prop industry, known for producing high-quality, long-lasting props. The steel blade construction suggests robustness, making it suitable for heavy-duty use, such as in commercial applications or demanding personal projects.

2. **Steel Blade Material** Unlike plastic or composite blades, steel blades are more resistant to wear, tearing, and environmental damage (e.g., UV rays, moisture). This can extend the prop s lifespan, especially in outdoor or industrial settings.

3. **Right-Handed (RH) Design** The right-handed orientation is standard for most props, ensuring compatibility with most propellers designed for right-hand rotation. This reduces the need for custom modifications or adjustments.

4. **Trophy Series** The "Trophy" designation implies that this prop is part of Mercury s premium line, likely offering better engineering, balance, and performance compared to standard models. This could translate to smoother operation and reduced vibration.

5. **Compatibility** With a 13.75-inch diameter and 25-pitch, this prop is designed for medium-sized engines, making it versatile for boats in the recreational to light-commercial range. It s likely to fit a variety of outboards or inboards without requiring significant modifications.

6. **Ease of Maintenance** Steel blades are easier to clean and maintain than composite or plastic alternatives. Rust prevention (e.g., regular drying and application of anti-corrosive coatings) can keep the prop in good condition for years.

7. **Resale Value** High-quality Mercury props, especially steel ones, retain their value better than generic or lower-grade props. If you decide to upgrade or sell later, this prop may fetch a decent resale price.

8. **Performance Consistency** Steel props are less prone to warping or deforming under load, which can help maintain consistent performance over time. This is particularly useful for applications where reliability is critical.

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1. **Weight** Steel blades are significantly heavier than plastic or composite alternatives. This added weight can impact fuel efficiency, especially in smaller boats, and may require adjustments to the engine s tuning or propeller shaft to compensate.

2. **Corrosion Risk** While durable, steel is susceptible to rust if not properly maintained. Saltwater environments, for example, can accelerate corrosion if the prop isn t cleaned and dried thoroughly after use. This may require additional upkeep, such as regular polishing or protective coatings.

3. **Cost** Steel props are generally more expensive upfront than plastic or aluminum props. The Mercury Trophy series, in particular, will likely be priced higher than basic models, which may be a barrier for budget-conscious buyers.

4. **Noise and Vibration** Steel props can sometimes produce more noise and vibration compared to lighter materials, especially if the blades are not perfectly balanced. This may affect passenger comfort in recreational boats or require additional damping measures.

5. **Limited Flexibility** Unlike composite props, which can bend slightly to absorb shock and reduce damage from striking objects, steel props are rigid. This means there s a higher risk of bending or damage if the prop strikes a hard object (e.g., a dock, rock, or debris).

6. **Specialized Tools for Repairs** If the prop sustains damage (e.g., a bent blade), repairs may require specialized tools or professional servicing, which can add to maintenance costs. Plastic or composite props are often easier to repair with basic tools.

7. **Less Common in Smaller Engines** While this prop is suitable for medium-sized engines, it may not be the best fit for very small outboards (e.g., 2 5 HP) where lighter, more efficient props are typically preferred. Oversizing the prop can lead to poor performance or excessive strain on the engine.

8. **Storage and Handling** The weight and rigidity of steel props make them less convenient to handle, transport, or store compared to lighter alternatives. They may require more effort to install or remove from the boat.

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The Mercury 48-825942-A4 Trophy RH Steel Blade Prop is an excellent choice for those prioritizing durability, longevity, and performance in medium-sized boats, particularly in applications where the prop will face heavy use or harsh conditions. Its steel construction offers superior resistance to wear and environmental factors, making it ideal for commercial or saltwater use. However, the higher cost, weight, and maintenance requirements (especially in corrosive environments) may not justify the purchase for casual or small-boat owners. Additionally, the rigidity of steel blades means there s a higher risk of damage if the prop strikes an obstacle.

For **recreational boaters** with medium-sized engines (e.g., 15 50 HP) who can afford the upfront cost and are willing to invest in maintenance, this prop is a strong investment. For **smaller engines, budget-conscious buyers, or those in freshwater with minimal debris**, a lighter or composite prop might be more practical. If corrosion is a concern, consider pairing this prop with a regular rust-prevention routine.

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- You own a medium-sized boat (e.g., 16 25 ft) with a compatible engine (likely 15 50 HP).

- You operate in saltwater or harsh conditions where durability is critical.

- You re willing to invest in a high-quality, long-term solution and can maintain it properly.

- You prioritize performance, reliability, and resale value over cost savings.

- You have a very small engine (e.g., under 10 HP) where a lighter prop would be more efficient.

- You re on a tight budget and can t afford the higher upfront cost or maintenance.

- Your boat operates primarily in freshwater with minimal debris and you prefer lower noise/vibration.

- You lack the time or resources to regularly clean and protect the prop from corrosion.

- For **smaller engines or budget-friendly options**, look at Mercury s plastic or aluminum props (e.g., 48-825942-A1 for plastic).

- For **flexibility and noise reduction**, composite props (e.g., Mercury s "Flex-Foil" series) may be worth exploring.

- If **fuel efficiency** is a priority, a slightly smaller pitch (e.g., 22 24) or lighter material might be better suited.

Details:

Mercury Trophy Plus RH Stainless Steel 4 Blade Prop 13.75 x 25 Pitch 48-825942A47. Buyer Pays Return Shipping. Missing a vent plug.

part #: 48825942a4 prices

• $479.99-$500.00

specifications propboapar:

• for models: Trophy
• for makes: Mercury
• for years: 2025
• mpn: 48-825942a4
• part type: Blade Prop
• propeller rotation: Standard

returns propboapar:

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

payments propboapar:

• wallet: Apple-pay
• other
• credit card: Visa

shipping propboapar:

• class: Standard
• type: Calculated
• service: USPS Ground Advantage
• carrier: USPS
• cost: $16.21
• transit: 9-13 Days

seller propboapar:

• rating: 99.6%
• # reviews: 542
• city: Gravois Mills, Missouri

general propboapar:

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

offer propboapar:

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

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