MERCURY Offshore Blade Propeller Propeller. 48-825902A46-21P

( Manufacturer Part Number: 48825902A4621P ), ( Part Type: Blade Propeller ), ( Propeller Rotation: Standard )

Review MERCURY Offshore Series Blade Stainless Propeller. Part No

The **Mercury 48825902A4621P Offshore Blade Propeller** is a high-performance marine propulsion component meticulously engineered to deliver exceptional efficiency, durability, and power for medium to large outboard and stern drive applications. Designed with a **4-blade offshore configuration**, this propeller is optimized for deep-V hulls, planing boats, and performance-oriented vessels that demand both speed and reliability in demanding marine environments. The **A4621P** designation indicates a carefully balanced pitch and diameter ratio, ensuring smooth acceleration, reduced cavitation, and improved fuel economy while maintaining strong thrust output. Constructed from **high-grade, corrosion-resistant stainless steel**, this propeller is built to withstand the harshest conditions, including saltwater exposure, frequent launches, and high-speed operation, making it an ideal choice for anglers, offshore cruisers, and recreational boaters who prioritize longevity and performance.

The **offshore blade design** features a **broad, aggressive blade face** that maximizes water displacement, enhancing propulsion efficiency and reducing drag, particularly at higher speeds. The **skeg and blade contours** are precision-molded to minimize turbulence and vibration, contributing to a quieter ride and reduced wear on the engine and drive system. The **pitch of 21 inches** strikes a perfect balance between acceleration and top-end speed, allowing the propeller to efficiently transition from planing to cruising without sacrificing power. This makes it particularly well-suited for boats ranging from **18 to 25 feet** in length, where a blend of speed and maneuverability is essential. Whether tackling rough seas, towing trailers, or navigating tight turns, the **48825902A4621P** delivers consistent performance with minimal effort from the engine.

For added durability, Mercury has incorporated **reinforced blade tips and a robust hub design**, ensuring resistance against bending, cracking, or deformation under heavy loads. The **propeller s overall diameter of 48 inches** provides ample thrust for larger displacement hulls, while the **optimized blade rake** helps prevent excessive wear on the drive unit. This propeller is also compatible with Mercury s **E-TEC and Verado outboard engines**, as well as compatible stern drive systems, making it a versatile upgrade for both stock and modified vessels. Whether used in stock form or paired with a performance chip for enhanced tuning, the **Mercury 48825902A4621P** is a premium choice for boaters who demand nothing less than peak performance, reliability, and long-term value in their marine propulsion system.

### **Pros and Cons of buying a Mercury 48825902A4621P Offshore Blade Propeller (48-825902A46-21P)**

1. **Performance Optimization** The offshore blade design is engineered for high-speed and deep-V hulls, improving fuel efficiency and reducing drag compared to standard propellers. This can lead to better overall boat performance, especially in open-water conditions.

2. **Durability and Strength** Mercury propellers are built with high-quality materials, including stainless steel or aluminum alloys, which are resistant to corrosion and wear. The offshore blade design is particularly robust, making it suitable for heavy-duty use in rough seas.

3. **Fuel Efficiency** The hydrodynamic shape of the offshore blades reduces resistance, allowing the boat to maintain speed with less engine strain. This can lead to lower fuel consumption over time, saving money on operational costs.

4. **Compatibility with Mercury Engines** This propeller is specifically designed for Mercury outboard motors, ensuring optimal performance and smooth operation when paired with compatible engines. Proper matching between propeller and engine prevents unnecessary wear and tear.

5. **Reduced Cavitation** The blade design minimizes cavitation (bubble formation that can damage propellers and engines), extending the lifespan of both components. This is particularly beneficial for boats operating at high speeds or in deep water.

6. **Easier Handling in Rough Water** The offshore blade profile helps stabilize the boat in choppy or wavy conditions, improving ride comfort and reducing the risk of slamming.

7. **Aftermarket Availability** Mercury propellers are widely available through dealers and online retailers, making replacements or upgrades straightforward if needed.

8. **Warranty Coverage** Mercury propellers often come with manufacturer warranties, providing peace of mind against defects or premature failure.

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1. **Higher Upfront Cost** Offshore blade propellers are generally more expensive than standard propellers due to their specialized design and materials. The cost may not be justified for boats that primarily operate in calm, shallow waters.

2. **Potential for Over-Torquing** If the propeller is too large for the engine s power output, it can cause excessive strain, leading to reduced performance or engine damage. Proper sizing is critical to avoid this issue.

3. **Limited Use Case for Shallow Water** Offshore blades are optimized for deep-water performance and may not be ideal for boats frequently operating in shallow waters, where a different propeller pitch might be more suitable.

4. **Maintenance Requirements** While durable, offshore propellers may require more frequent inspections for pitting, corrosion, or blade damage, especially in saltwater environments. Regular cleaning and lubrication are necessary to maintain performance.

5. **Noise and Vibration** Some users report increased noise and vibration with offshore blades, particularly at high speeds. This can be mitigated by ensuring proper alignment and balance but may still be a consideration for noise-sensitive operators.

6. **Not Universal** This specific propeller (48-825902A46-21P) is designed for a 48-inch diameter Mercury outboard with a 21-pitch. Mismatching it with the wrong engine or hull could lead to poor performance or damage.

7. **Potential for Reduced Acceleration** In some cases, offshore blades may offer better cruising speed but could sacrifice quick acceleration compared to propellers with a finer pitch.

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The **Mercury 48825902A4621P offshore blade propeller** is an excellent choice for boats that prioritize **high-speed performance, fuel efficiency, and durability in open-water conditions**. It is particularly well-suited for deep-V hulls, offshore cruising, or boats frequently operating in rough seas. However, it may not be the best option for **shallow-water use, low-speed maneuvering, or boats with limited engine power**, where a different propeller pitch might be more appropriate.

If your boat s primary use aligns with the propeller s design benefits such as long-distance cruising, racing, or heavy-duty offshore use then the investment is justified. Conversely, if your boat spends most of its time in calm, shallow waters or requires frequent low-speed operations, a standard or fine-pitch propeller might be more cost-effective.

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- Your boat is a deep-V hull or designed for high-speed cruising.

- You frequently operate in open water, rough seas, or at sustained high speeds.

- You want to improve fuel efficiency and reduce engine strain.

- Your Mercury engine is properly matched to the propeller s pitch and diameter.

- Your boat primarily operates in shallow or calm waters.

- You frequently need quick acceleration or low-speed control.

- Your engine is underpowered for the propeller s load, risking over-torquing.

- You are on a tight budget and a standard propeller would suffice.

**Final Suggestion:** Before purchasing, consult a **Mercury dealer or marine professional** to ensure the propeller is correctly sized for your engine and hull. If possible, test the propeller in similar conditions to confirm it meets your performance expectations. Regular maintenance will also extend its lifespan and performance.

Details:

Part no: 48-825902A46-21P Good condition, i've never used it. Mercury Offshore Series 4 Blade Stainless propeller.

part #: 48825902a4621p prices

• $175.00-$325.00

specifications propboapar:

• for makes: Mercury
• mpn: 48825902a4621p
• part type: Blade Propeller
• propeller rotation: Standard

payments propboapar:

• wallet: Google-pay
• other
• credit card: Diners-club

offer propboapar:

• options: Ship-to-home
• best offers: True
• sold: 0
• availability: In Stock
• started: March 11, 2026
• quantity: 1

shipping propboapar:

• transit: 5-10 Days
• cost: $35.91
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx
• type: Calculated
• class: Standard

returns propboapar:

• policy: No Returns

general propboapar:

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

seller propboapar:

• rating: 0.0%
• # reviews: 59
• city: Midway, Georgia

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