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  2. sku: 12579748367453731
  3. MERCURY 487398SA4

MERCURY 487398SA4 Quicksilver Steel Propeller

fits model: Marine. make: Mercury.

487398sa4 Mercury Marine Quicksilver Stainless Steel Propeller

( Manufacturer Part Number: 487398SA4 ), ( Part Type: Propeller ), ( Propeller Rotation: Standard )

Review MERCURY Quicksilver Stainless Steel Propeller fits MARINE

The **Mercury 487398SA4 Marine Quicksilver Steel Propeller** is a high-performance, precision-engineered propeller designed to deliver exceptional efficiency, durability, and power transfer for Mercury outboard motors, particularly those in the 150 250 horsepower range. Crafted from **high-grade, corrosion-resistant steel**, this propeller is built to withstand the harshest marine environments, including saltwater exposure, heavy loads, and prolonged use, ensuring long-lasting reliability without compromising performance. Its **four-blade Quicksilver design** optimizes thrust and reduces cavitation, allowing for smoother acceleration, improved fuel efficiency, and enhanced handling whether cruising at high speeds or navigating tight turns with precision. The **steel construction** provides superior strength and resistance to bending or warping, making it ideal for powerboats, fishing vessels, and performance yachts that demand both power and durability. The **balanced and machined blades** minimize vibration, reducing wear on the motor and improving overall ride comfort, while the **ergonomic shape** enhances efficiency across a wide RPM range, ensuring consistent performance whether under light loads or heavy loads. Whether used in recreational boating, offshore fishing, or high-speed applications, this propeller is engineered to maximize power delivery, reduce fuel consumption, and extend the lifespan of your Mercury outboard, making it a premium choice for serious boaters who demand nothing less than excellence.

The **Mercury 487398SA4 Marine QuickSilver Steel Propeller** is a popular choice for Mercury outboard engines, particularly for boats in the 150 250 HP range. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Durability and Strength**

The steel construction makes this propeller highly resistant to corrosion, bending, and wear, especially in saltwater environments. Steel propellers generally last longer than aluminum or composite alternatives, reducing long-term replacement costs.

2. **Efficiency and Performance**

The QuickSilver series is designed for optimal performance, offering improved fuel efficiency and thrust compared to older propeller models. The hydrodynamic shape helps reduce cavitation and vibration, leading to smoother operation and better speed.

3. **Compatibility with Mercury Outboards**

This propeller is specifically engineered for Mercury outboards, ensuring seamless integration with the engine s power output. It is designed to work well with the 4-stroke and some 2-stroke Mercury models, particularly those in the 150 250 HP range (e.g., Verado, FourStroke, or older Mercury outboards).

4. **Reduced Cavitation and Vibration**

The propeller s design minimizes cavitation (the formation of vapor bubbles that can damage the propeller and engine), which helps protect both the propeller and the outboard s lower unit. This also contributes to quieter operation and less stress on the engine.

5. **Easier Maintenance**

Steel propellers are simpler to clean and inspect compared to composite propellers, which can be damaged by sharp objects or improper handling. Rust can be treated with anti-corrosion coatings, extending the propeller s lifespan.

6. **Resale Value and Market Availability**

As a well-known brand, Mercury propellers hold good resale value. Replacement parts and service information are widely available, making repairs or upgrades easier if needed.

7. **Versatility**

The QuickSilver series is suitable for a variety of boat types, including fishing boats, cruisers, and performance boats, depending on the specific model and pitch. It performs well in both freshwater and saltwater conditions.

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### **Cons**

1. **Higher Initial Cost**

Steel propellers are generally more expensive upfront than aluminum or composite propellers. While they last longer, the initial investment may be a barrier for budget-conscious buyers.

2. **Weight**

Steel propellers are heavier than aluminum or composite alternatives. This can make them more difficult to handle, especially for smaller boats or those with limited storage space. The added weight may also slightly reduce maneuverability in tight spaces.

3. **Susceptibility to Rust**

While steel is durable, it is not immune to corrosion. In saltwater or poorly maintained conditions, rust can develop over time, requiring regular cleaning and possibly anti-corrosion treatments. Neglect can lead to pitting or structural weakness.

4. **Potential for Damage from Sharp Objects**

Unlike composite propellers, which can flex slightly to avoid damage from debris, steel propellers are rigid. Hitting a sharp object (e.g., a rock, shell, or fishing line) can cause immediate and severe damage, leading to costly repairs or replacement.

5. **Limited Customization**

Mercury propellers are designed for specific engine models and applications. If your boat s needs change (e.g., switching to a different engine or boat type), you may need to replace the propeller entirely rather than adjusting it.

6. **Noise and Vibration in Some Cases**

While the QuickSilver series is designed to reduce vibration, improper installation or wear over time can lead to increased noise and vibration. This may require tuning the propeller s pitch or replacing it if issues persist.

7. **Less Flexibility for Off-Road or Extreme Use**

For boats used in extreme conditions (e.g., heavy fishing, towing, or off-road watercraft), a composite or high-performance propeller might offer better flexibility in terms of durability and adaptability.

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### **Conclusion**

The **Mercury 487398SA4 Marine QuickSilver Steel Propeller** is an excellent choice for boat owners who prioritize **durability, efficiency, and long-term reliability**, particularly for Mercury outboards in the 150 250 HP range. Its steel construction ensures resistance to corrosion and wear, while its design enhances performance and reduces cavitation. However, the higher upfront cost, weight, and susceptibility to rust or damage from debris are factors to consider.

For most **fishing boats, cruisers, or performance boats** operating in moderate to heavy use, this propeller is a strong recommendation. If your boat is used in **extreme conditions** (e.g., frequent contact with sharp objects, heavy towing, or off-road watercraft), you may want to explore alternatives like composite propellers or high-performance models. Additionally, if budget is a concern, balancing the long-term savings of a steel propeller against the initial cost is important.

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### **Recommendation**

**Buy the Mercury 487398SA4 Marine QuickSilver Steel Propeller if:**

- You own a Mercury outboard in the 150 250 HP range and want a propeller that maximizes durability and efficiency.

- Your boat operates in **saltwater or harsh conditions** where corrosion resistance is critical.

- You prioritize **long-term value** over short-term cost savings, as the propeller s lifespan and performance justify the higher initial investment.

- You plan to use the boat for **fishing, cruising, or general performance** without extreme off-road or high-impact use.

**Consider alternatives if:**

- You frequently encounter **sharp debris** (e.g., rocks, shells) and are concerned about propeller damage.

- Your budget is tight, and you can afford a slightly less durable but cheaper propeller (e.g., aluminum or composite).

- You operate in **extreme conditions** (e.g., heavy towing, off-road watercraft) where a more flexible or high-performance propeller might be better suited.

- You need **lightweight handling**, as the steel propeller s weight could be cumbersome for smaller boats.

**Final Verdict:** For the average Mercury outboard owner seeking a balance of performance, durability, and longevity, the **QuickSilver SA4 propeller is a highly recommended choice**. Proper maintenance (regular cleaning, anti-corrosion treatments, and careful handling) will ensure it performs optimally for years.

Details:

Like new 21 pitch Mercury propeller with Alpha One out drive prop nut kit. All numbers stamped on the prop. 487398sA4 21P Not a knock, ding, gouge on it.

part #: 487398sa4 price

  • $150.00

specifications propboapar:

  • for models: Marine
  • for makes: Mercury
  • mpn: 487398sa4
  • part type: Propeller
  • propeller rotation: Standard

general propboapar:

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

payments propboapar:

  • credit card: Mastercard
  • wallet: Paypal
  • other

returns propboapar:

  • policy: No Returns

offer propboapar:

  • started: May 28, 2026
  • quantity: 1
  • best offers: True
  • availability: In Stock
  • sold: 0
  • options: Ship-to-home

shipping propboapar:

  • class: Standard
  • cost: $16.25
  • service: USPS Ground Advantage
  • carrier: USPS
  • transit: 7-11 Days
  • type: Calculated

seller propboapar:

  • city: Burlingame, Kansas
  • # reviews: 573
  • rating: 100.0%
for models: marine, for makes: mercury, part type: propeller, propeller rotation: standard,
category: boat parts > propellers, sku: 12579748367453731,
Mercury 487398SA4 Is Similar To:
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1 offer $150.00 USD
  • Used. Offer #1 priced at $150.00 + $16.25 shipping estimate = $166.25* total. 21P Not a knick, ding, gouge on it. Like new 21 pitch Mercury propeller with Alpha One outdrive prop nut kit.+$16.25 shipping

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