MERCURY 93423A2 Quicksilver Plate Nos

( Manufacturer Part Number: 93423A2 ), ( Part Type: Plate ), ( Country Of Origin: United States )

Review MERCURY New Genuine Quicksilver Plate Assembly Oem Nos Nla

The **Mercury 93423A2 Quicksilver Plate NOS (New Old Stock)** is a rare and highly sought-after component from the legendary Mercury marine engine lineup, specifically designed for the iconic outboard motors of the 1970s and early 1980s. This **Quicksilver Plate** is a critical part of the engine s electrical system, serving as a corrosion-resistant, high-conductivity interface between the engine s wiring harness and the metal components of the outboard. Crafted from **pure, high-grade silver-plated copper**, the plate ensures optimal electrical conductivity while resisting the harsh marine environment, which is often exposed to saltwater, humidity, and constant vibration. The **93423A2 designation** indicates its precise fitment for Mercury s **400 series outboards**, particularly models like the **Mercury 400, 450, and 500 HP** engines, where reliability and performance were paramount. As a **New Old Stock (NOS) unit**, this part has been carefully preserved in its original packaging or packaging-like conditions, ensuring it remains free from wear, corrosion, or degradation that could compromise its functionality. Collectors and restorers prize NOS parts like this Quicksilver Plate for their authenticity, as they offer the same performance and durability as when they were originally installed in factory-fresh engines. Whether used in a classic boat restoration project or as a replacement for a failing electrical component in a vintage outboard, this plate exemplifies Mercury s engineering precision and the enduring legacy of their marine power systems. Its inclusion in a restoration ensures not only improved electrical efficiency but also a nod to the craftsmanship of an era when marine engines were built to last.

### **Pros and Cons of Buying a Mercury 93423A2 Quicksilver Plate (NOS, NLA)**

#### **Overview**

The **Mercury 93423A2 Quicksilver Plate** is a high-performance, outboard marine engine known for its reliability, power, and durability. As a **New Old Stock (NOS)** or **Never Launched (NLA)** unit, it is in pristine condition but may come with trade-offs depending on your needs.

---

### **Pros**

1. **High Performance and Power**

- The 93423A2 is part of Mercury s **Quicksilver series**, which is designed for speed and efficiency. It delivers strong horsepower, making it ideal for high-performance boats, speedboats, and racing applications.

- The **direct-drive design** and **aluminum construction** contribute to better power transfer and reduced weight compared to older models.

2. **Reliability and Durability**

- Mercury s **Quicksilver engines** are built with modern materials and precision engineering, reducing the risk of common issues found in older outboards.

- The **sealed-for-life** components (such as the **Quicksilver Drive**) minimize wear and tear, extending the engine s lifespan if maintained properly.

3. **Fuel Efficiency (Compared to Older Models)**

- While not as fuel-efficient as modern outboards, it performs better than many **pre-1990s** Mercury engines due to improved combustion systems and fuel injection (if applicable).

4. **Classic Collectibility & Nostalgia Value**

- As a **NOS/NLA** unit, it retains original factory specifications, making it desirable for collectors, restorers, or enthusiasts who appreciate vintage marine engines.

- Some buyers seek these engines for **restoration projects**, where original parts are hard to find.

5. **Potential for Customization & Tuning**

- The **Quicksilver series** was designed with performance in mind, allowing for **aftermarket upgrades** (e.g., turbocharging, fuel injection modifications, or camshaft swaps).

- Unlike some older Mercury engines, it has a **modern control system**, making it easier to integrate with modern electronics.

6. **Lower Operating Costs (Compared to Modern High-Performance Engines)**

- While not as fuel-efficient as modern outboards, it consumes less fuel than **supercharged or turbocharged** engines of similar power.

- **Maintenance costs** may be lower than newer high-performance engines if you have experience with marine mechanics.

7. **Good for Racing & High-Speed Applications**

- The **lightweight aluminum construction** and **direct-drive design** make it well-suited for **speedboat racing, hydroplane racing, or high-performance cruising**.

- Many **classic boat restorers** prefer these engines for their **raw power and simplicity**.

---

### **Cons**

1. **Age-Related Wear (Even in NOS/NLA Condition)**

- While **NOS/NLA** means it has not been used, **storage conditions** can still affect the engine. **Oil breakdown, rust, or dry rot** in seals can occur over decades.

- **Original components** (such as **carburetors, timing belts, or water pumps**) may need replacement if not properly preserved.

2. **Lack of Modern Emissions & Fuel Efficiency Standards**

- The **93423A2** predates **modern emissions regulations**, meaning it may not meet **current EPA or Clean Air Act standards** if used in some regions.

- **Fuel injection (if present)** may not be as precise as modern systems, leading to **higher fuel consumption** compared to newer engines.

3. **Limited Availability of Original Parts**

- While it s **NOS/NLA**, finding **exact replacement parts** (especially for older Mercury models) can be difficult.

- Some **aftermarket parts** may not fit perfectly due to **design differences** from newer engines.

4. **Higher Initial Cost (Compared to Used Modern Engines)**

- A **pristine NOS/NLA** Mercury engine will likely cost **more than a used modern outboard** of similar power, especially if it s in **collectible condition**.

- **Restoration costs** (if needed) could add significant expense.

5. **Maintenance Complexity**

- **Regular oil changes** (synthetic oil recommended)

- **Timing belt replacement** (if applicable)

- **Water pump inspection** (to prevent leaks)

- **Carburetor or fuel system cleaning** (if not fuel-injected)

- **Lack of digital diagnostics** means troubleshooting may require **more mechanical expertise**.

6. **Potential for Hidden Damage**

- Even if the engine is **NOS/NLA**, **storage damage** (e.g., **rust, cracked casings, or seized components**) can occur.

- A **thorough inspection by a marine mechanic** is **highly recommended** before purchase.

7. **Resale Value May Be Low**

- Unlike **modern high-performance engines**, the **93423A2** may not hold its value well in the secondary market, especially if not in **showroom condition**.

- **Restored engines** may have better resale potential, but this requires investment.

8. **Noise and Vibration**

- Older outboards tend to be **noisier and more vibration-prone** than modern engines with **balanced crankshafts and sound-dampening materials**.

- This can be an issue for **long-term cruising** or **quiet operation**.

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### **Conclusion**

- **Enthusiasts who prioritize performance, collectibility, and vintage engineering.**

- **Boat restorers** looking for a **high-quality, original engine** for classic speedboats or racing applications.

- **Owners of high-performance boats** who prefer **raw power and direct-drive efficiency** over modern fuel economy.

- **Those willing to invest in maintenance** to keep the engine running smoothly.

- **Budget-conscious buyers** who want a **modern, low-maintenance outboard.**

- **Those who prioritize fuel efficiency and emissions compliance.**

- **Casual boaters** who prefer **ease of use and minimal mechanical hassle.**

- **Buyers who cannot afford potential restoration costs** if the engine requires work.

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### **Recommendation**

You have **experience with marine engines** or are willing to **learn maintenance.**

You are **restoring a classic boat** or building a **high-performance racing vessel.**

You **value nostalgia and originality** over modern convenience.

You **inspect it thoroughly** (or have a mechanic do so) before purchasing.

You are **prepared for higher upfront costs** but expect **long-term reliability** if maintained properly.

You need **fuel efficiency, low emissions, or modern diagnostics.**

You are **not mechanically inclined** and cannot handle **regular maintenance.**

You **cannot afford potential restoration or part replacement costs.**

You **prioritize resale value** over performance and collectibility.

For the right buyer someone who appreciates **vintage marine engineering and is willing to invest time and effort** the **Mercury 93423A2 Quicksilver Plate (NOS/NLA)** is a **fantastic purchase** that offers **power, durability, and character.** However, it is **not a plug-and-play solution** for casual boaters or those seeking modern convenience. **Always verify condition, test run (if possible), and consult a mechanic before buying.**

Details:

Thanks!, MONEY BACK GUARANTEE. I do not set the prices on shipping. NEW Genuine Mercury Quicksilver 93423A2 Plate Assembly OEM NOS NLA: Please understand that I ship everything priority mail and always have, don't make a single cent on shipping or handling. And the Post Office do that automatically.

I have many positive comments about my fast shipping and that's because ship priority mail. However if you do not want priority shipping please let me know and I will change it to something else which would be slower cheaper.

part #: 93423a2 prices

• $15.99-$90.56

specifications ouboaen:

• for makes: Mercury
• mpn: 93423a2
• part type: Plate
• country of origin: United States

general ouboaen:

• condition: New other see details
• Boat Parts > Outboard Engines Components > Other

returns ouboaen:

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

shipping ouboaen:

• carrier: USPS, UPS
• transit: 5-11 Days
• cost: $5.62
• type: Calculated
• class: Standard, Expedited
• service: USPS Ground Advantage, USPS Priority Mail, UPS Ground

seller ouboaen:

• city: Rutherfordton, North Carolina
• # reviews: 646
• rating: 98.5%

payments ouboaen:

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

offer ouboaen:

• started: March 12, 2026
• sold: 0
• options: Ship-to-home
• quantity: 2
• availability: In Stock

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