MERCURY 66951 Pivot Shaft Rear Suspension Hurricane

( Manufacturer Part Number: 66951 ), ( Part Type: Shaft Suspension Hurricane )

Review MERCURY Vintage Snowmobile Pivot Shaft Rear Suspension Hurricane

The **Mercury 66951 Pivot Shaft Rear Suspension for Hurricane Models** is a high-performance, precision-engineered component designed to deliver superior handling, durability, and reliability for Mercury s iconic Hurricane outboard motors. Crafted from robust, heat-treated steel, this pivot shaft is built to withstand the demanding stresses of high-speed operation, aggressive maneuvering, and extended use in both freshwater and saltwater environments. The shaft features a meticulously machined, ball-bearing-supported pivot mechanism, ensuring smooth, friction-free articulation that minimizes wear on the suspension system while enhancing steering responsiveness. Its robust construction resists bending, fatigue, and corrosion, making it an ideal upgrade for anglers, boaters, and performance enthusiasts who demand nothing less than flawless performance from their marine propulsion system.

Engineered to fit seamlessly with Mercury s Hurricane series, this pivot shaft is compatible with a range of models, including those equipped with the company s legendary 90 and 110 steering systems. The design incorporates a reinforced trunnion housing that distributes load evenly, reducing stress on the suspension linkage and extending the lifespan of related components like the steering cable and lower unit. For added convenience, the pivot shaft is engineered with a straightforward installation process, requiring minimal tools and allowing for quick replacement without the need for specialized equipment. Whether used in stock applications or as part of a custom tuning package, this suspension component elevates the overall driving experience by providing a firmer, more predictable ride while maintaining the Hurricane s reputation for power and precision.

Built to meet Mercury s stringent quality standards, the 66951 pivot shaft undergoes rigorous testing to ensure it meets or exceeds the performance expectations of both factory and aftermarket applications. Its compatibility with Mercury s proprietary suspension geometry guarantees optimal alignment and clearance, reducing the risk of binding or premature failure. For boaters who prioritize longevity and performance, this pivot shaft is an essential upgrade, offering a balance of strength, flexibility, and ease of maintenance. Whether navigating rough waters, towing heavy loads, or simply enjoying the open sea, the Mercury 66951 Pivot Shaft Rear Suspension ensures that the Hurricane delivers the smooth, controlled power and maneuverability it s renowned for.

The **Mercury 66951 Pivot Shaft Rear Suspension** is a common replacement part for older Mercury and Ford vehicles, particularly those with the **Hurricane** suspension system. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of buying a Mercury 66951 Pivot Shaft**

1. **Compatibility and Fitment**

The pivot shaft is designed specifically for Mercury vehicles (such as the **Grand Marquis, Marquis, and some Ford models**) with the **Hurricane suspension**. It is a direct replacement part, meaning it should fit without modification if sourced from a reputable manufacturer. This reduces the risk of alignment or handling issues after installation.

2. **Durability and Performance**

The Hurricane suspension system is known for its solid construction, and the pivot shaft is a critical component that supports the rear axle. A high-quality pivot shaft can improve ride comfort, reduce noise, and maintain proper suspension geometry, which is essential for long-term reliability.

3. **Ease of Installation**

Replacing a worn or damaged pivot shaft is generally a straightforward DIY job for those with basic mechanical skills. It typically requires lifting the vehicle, removing the old shaft, and installing the new one with the appropriate hardware. Many aftermarket pivot shafts come with gaskets or seals to simplify the process.

4. **Cost-Effective Replacement**

Compared to a full suspension overhaul, replacing just the pivot shaft is a relatively inexpensive fix. Prices vary, but a genuine or high-quality aftermarket part usually costs between **$50 and $150**, depending on the source. This makes it a practical solution for addressing suspension wear without a major investment.

5. **Prevents Further Damage**

A failing pivot shaft can lead to misalignment, uneven tire wear, or even damage to other suspension components (such as bushings or control arms). Replacing it proactively can prevent more costly repairs down the road.

6. **Availability of Genuine and Aftermarket Options**

The part is widely available from **OEM (Original Equipment Manufacturer) suppliers**, as well as reputable aftermarket brands. Buying from a trusted source ensures quality, though OEM parts may be more expensive.

7. **Improved Handling and Safety**

A properly functioning pivot shaft helps maintain the intended suspension geometry, which contributes to better handling, stability, and safety. This is particularly important for vehicles used frequently or in varied driving conditions.

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### **Cons of buying a Mercury 66951 Pivot Shaft**

1. **Potential for Counterfeit or Low-Quality Parts**

The aftermarket for suspension parts can be saturated with **counterfeit or poorly made replicas**, especially from unscrupulous sellers. Low-quality pivot shafts may fail prematurely, leading to repeated replacements and frustration. Always purchase from **verified suppliers** (e.g., RockAuto, 1A Auto, or local auto parts stores with return policies).

2. **Wear on Related Components**

If other suspension parts (such as bushings, ball joints, or control arms) are worn, replacing just the pivot shaft may not fully resolve handling or noise issues. A thorough inspection of the entire suspension system is recommended before purchasing.

3. **Installation Challenges**

While the replacement is generally simple, some vehicles may require **special tools** (e.g., a press for stubborn bearings) or **additional disassembly** (e.g., removing the axle housing). Those without mechanical experience may struggle, leading to improper installation or damage to surrounding components.

4. **Limited Longevity Compared to OEM**

Aftermarket pivot shafts, even from reputable brands, may not last as long as **OEM parts** due to differences in materials or manufacturing processes. Some users report that high-mileage vehicles may require replacement every **50,000 80,000 miles**, depending on driving conditions.

5. **Misalignment Risks**

If the pivot shaft is not installed correctly or if the vehicle s alignment was not checked after replacement, it can lead to **uneven tire wear, pulling, or poor handling**. An alignment is often recommended after suspension work.

6. **Cost of Additional Repairs**

If the pivot shaft fails shortly after installation due to a defect, the buyer may incur **shipping costs, return fees, or additional labor charges** if the part needs to be replaced. This can be frustrating if the part was purchased from an unreliable source.

7. **Environmental and Driving Conditions**

Vehicles driven in **rough terrain, off-road conditions, or with heavy loads** may experience accelerated wear on the pivot shaft. In such cases, more frequent inspections and potential upgrades (e.g., reinforced aftermarket parts) may be necessary.

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### **Conclusion**

The **Mercury 66951 Pivot Shaft** is a **practical and cost-effective solution** for restoring proper rear suspension function in compatible vehicles. It offers **improved ride quality, safety, and longevity** when installed correctly and sourced from a reputable supplier. However, the part is not without drawbacks, particularly the **risk of counterfeit products, potential installation challenges, and the need for complementary suspension checks**.

- The part is purchased from a **trusted source** (preferably OEM or a well-reviewed aftermarket brand).

- The **entire suspension system is inspected** before and after replacement.

- The vehicle is **properly aligned** post-installation.

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### **Recommendation**

1. **Verify Fitment**

Double-check that the **66951 pivot shaft** is the correct part for your specific vehicle model and year. Some Mercury models (e.g., early vs. late Hurricane suspensions) may require slight variations.

2. **Purchase from a Reputable Supplier**

Buy from **RockAuto, 1A Auto, or a local auto parts store with a return policy**. Avoid suspiciously cheap parts from unknown sellers, as they may be counterfeit or low-quality.

3. **Inspect Related Components**

Before purchasing, inspect the **rear suspension bushings, ball joints, control arms, and axle housing** for wear. Replace any failing parts simultaneously to ensure optimal performance.

4. **Consider Professional Installation**

If you lack mechanical experience, **have a trusted mechanic install the pivot shaft**. Proper installation is critical for safety and longevity.

5. **Monitor Performance After Installation**

Pay attention to **noise, handling, and tire wear** in the weeks following replacement. If issues arise, have the installation checked or consider upgrading to a **reinforced aftermarket part** if the vehicle sees heavy use.

6. **Budget for an Alignment**

After replacing the pivot shaft, **get a wheel alignment** to prevent uneven tire wear and ensure optimal suspension geometry.

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### **Final Verdict**

- You need a **direct replacement** for a failing pivot shaft.

- You re confident in your ability to **inspect and install it correctly**.

- You purchase it from a **trusted source** and address any related suspension issues.

- You suspect **counterfeit parts** from untrusted sellers.

- You re unsure about **installation difficulty** or lack proper tools.

- Other suspension components are **severely worn** and require replacement.

For most drivers, this part is a **wise investment** in maintaining vehicle safety and performance, provided due diligence is taken in sourcing and installation.

Details:

NOTE: May have slight shelf wear. All vintage parts sold as is. RARE Find for restoration project. NOTE: This is OEM Mercury Not aftermarket.

May also fit other years or model's of vintage Mercury snowmobiles. Fits 1973 Hurricane Mark II with slide suspension. Please view all photos before buying. You are buying on a NOS Mercury part# 66951 Pivot Shaft 2 11/16 rear suspension.

part #: 66951 prices

• $18.50-$29.99

specifications snowmobileshocksoi:

• for makes: Mercury
• mpn: 66951
• part type: Shaft Suspension Hurricane

seller snowmobileshocksoi:

• # reviews: 141
• city: Wessington Springs, South Dakota
• rating: 100.0%

payments snowmobileshocksoi:

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

offer snowmobileshocksoi:

• availability: In Stock
• best offers: True
• started: March 15, 2026
• quantity: 6
• sold: 0
• options: Ship-to-home

returns snowmobileshocksoi:

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

general snowmobileshocksoi:

• condition: New other see details
• Parts Accessories > Snowmobile Parts > Shocks Suspension

shipping snowmobileshocksoi:

• carrier: USPS
• cost: $9.50
• class: Standard
• service: USPS Ground Advantage
• transit: 4-10 Days
• type: Fixed

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