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  2. sku: 7831258049180713
  3. MERCURY 90391

MERCURY 90391 Quicksilver Clamp Boat

fits model: E85. make: Mercury.

90391 Mercury E85 Genuine Quicksilver Clamp Oem New Factory Boat Parts

( Part Type: Clamp ), ( Manufacturer Part Number: 90391 )

Review MERCURY Genuine Quicksilver Clamp Oem New Factory Boat Parts fits E85

The Mercury 90391 E85 Quicksilver Clamp Engine is a high-performance outboard motor designed for use with E85 ethanol fuel. This engine is part of Mercury's Quicksilver series, which is known for its reliability, efficiency, and robust design.

The Mercury 90391 E85 Quicksilver Clamp Engine is a 3.4L, V6, two-stroke powerhouse that delivers an impressive 175 horsepower. Its powerful and efficient design makes it an excellent choice for larger boats or those who require a high level of power and speed.

This engine features Mercury's innovative E85 Ethanol Fuel System, which is specifically designed to deliver optimal performance and efficiency when using ethanol fuel. The system includes a unique fuel pump, carburetor, and ignition system that are all optimized for ethanol fuel.

The Mercury 90391 E85 Quicksilver Clamp Engine is also equipped with Mercury's Advanced MidSection (AMS) design. This design provides exceptional rigidity and durability, ensuring that the engine can handle the demands of heavy use. The engine's midsection is made from high-strength aluminum alloy, which is both lightweight and strong.

The engine's clamp design makes installation quick and easy. The clamp design allows the engine to be easily mounted to the transom without the need for drilling or welding. The engine comes with a mounting plate and all necessary hardware for installation.

The Mercury 90391 E85 Quicksilver Clamp Engine also features Mercury's advanced electronic fuel injection system. This system delivers precise fuel delivery to the engine, ensuring optimal performance and fuel efficiency. The engine is also equipped with Mercury's Digital Throttle & Shift (DTS) system, which provides smooth and responsive shifting and throttle control.

The Mercury 90391 E85 Quicksilver Clamp Engine is designed to be easy to maintain. It features a simple, no-tools oil change system, which makes changing the oil quick and easy. The engine also features a large, easy-to-access air filter, which can be easily serviced without the need for tools.

In summary, the Mercury 90391 E85 Quicksilver Clamp Engine is a high-performance, reliable, and efficient outboard motor that is specifically designed for use with E85 ethanol fuel. Its robust design, advanced features, and easy installation make it an excellent choice for those who demand the best in power, performance, and reliability from their outboard motor.

Mercury 90HP 391 E85 QS (Quicksilver) Clamp Engine: An In-depth Analysis

Mercury Marine's 90HP 391 E85 QS Clamp Engine, also known as the Quicksilver series, is a popular choice among boat owners who require a powerful and efficient outboard motor. In this analysis, we will discuss the pros and cons of purchasing this engine to help you make an informed decision.

Pros:

1. High Power Output: With a displacement of 3.4 liters and four-cylinder design, this engine delivers an impressive 90 horsepower, making it suitable for larger boats and heavy loads.

2. Fuel Efficiency: The Mercury 90HP 391 E85 QS Clamp Engine is designed to run on E85 ethanol fuel, which is renewable, cleaner-burning, and more cost-effective than traditional gasoline. This not only reduces the environmental impact but also saves money in the long run for those who frequently use their boats.

3. Durability: Mercury Marine engines are renowned for their robustness and reliability. This engine features a heavy-duty, all-aluminum construction that can withstand the rigors of frequent use and harsh marine conditions.

4. Easy Installation: The clamp-mount design of this engine simplifies the installation process. It allows for quick and easy attachment to the transom of the boat, which is particularly beneficial for DIY installations or for those who want to minimize downtime during repairs or upgrades.

5. Versatile: This engine is compatible with a wide range of Mercury propellers and drive systems, providing boat owners with the flexibility to choose the best combination for their specific needs and preferences.

Cons:

1. Limited Fuel Availability: E85 ethanol fuel is not readily available in all areas, which can make it difficult for some boat owners to access this fuel. In such cases, they may have to rely on traditional gasoline, which could increase their operating costs and carbon emissions.

2. Higher Initial Cost: While the long-term savings from using E85 fuel can be substantial, the initial investment for the engine and the necessary modifications to the boat's fuel system can be quite high.

3. Requires Fuel System Modifications: To use E85 fuel, the boat's fuel system must be modified to accommodate this alternative fuel. This may involve the purchase and installation of specialized components, such as flexible fuel sensors and fuel lines, which can add to the overall cost.

4. Fuel System Compatibility: Not all boats are compatible with E85 fuel, and some may require additional modifications to ensure that the fuel system can safely and efficiently process this alternative fuel.

5. Limited Warranty Coverage: Mercury Marine's standard warranty does not cover damages caused by the use of alternative fuels, such as E85. Boat owners may need to purchase an extended warranty or separate coverage for their engines to ensure protection against potential issues related to the use of this fuel.

Conclusion:

The Mercury 90HP 391 E85 QS Clamp Engine offers several advantages, including high power output, fuel efficiency, durability, easy installation, and versatility. However, it also comes with some drawbacks, such as limited fuel availability, higher initial cost, fuel system modifications, fuel system compatibility, and limited warranty coverage.

Ultimately, the decision to purchase this engine depends on several factors, including the boat owner's budget, geographical location, fuel preferences, and specific needs and preferences. If you frequently use your boat, have easy access to E85 fuel, and are willing to make the necessary modifications, then the Mercury 90HP 391 E85 QS Clamp Engine could be an excellent investment for you. On the other hand, if you frequently use traditional gasoline, have limited access to E85 fuel, or are not willing to modify your fuel system, then this engine may not be the best choice for you.

Recommendation:

If you believe that the benefits of the Mercury 90HP 391 E85 QS Clamp Engine align with your needs and preferences, then we would recommend considering this engine for your boat. However, we strongly advise that you consult with a Mercury Marine dealer, a fuel system specialist, and your insurance provider to discuss the potential costs, compatibility, and coverage implications before making a final decision.

Details:

part #: 90391 prices

  • $16.46-$17.58

specifications vesselveep:

  • for models: E85
  • for makes: Mercury
  • part type: Clamp
  • manufacturer part number: 90391

seller vesselveep:

  • city: Crystal River, Florida
  • # reviews: 63958
  • rating: 98.7%

returns vesselveep:

  • policy: No Returns

general vesselveep:

  • condition: New
  • Parts Accessories > Boat Parts > Other

payments vesselveep:

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

shipping vesselveep:

  • service: Expedited
  • class: Expedited
  • type: Fixed
  • transit: 4-8 Days
  • cost: $4.65

offer vesselveep:

  • started: July 14, 2025
  • best offers: True
  • options: Ship-to-home
  • quantity: 10
  • sold: 0
  • availability: In Stock
for models: e85, for makes: mercury, part type: clamp,
sku: 7831258049180713,

Mercury 90391 Is Similar To:

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2 offers $16.46–$17.58 USD
  • New. Offer #1 priced at $16.46 + $4.65 delivery = $21.11* total. +$4.65 shipping
  • New. Offer #2 priced at $17.58 + $3.95 delivery = $21.53* total. +$3.95 shipping

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