1. Boat Outboard Engines To Buy
  2. sku: 22125265892826793
  3. MERCURY 225-2494A8

MERCURY 225-2494A8 Cylinder Inline Flywheel Freshwater 80-100HP

fits make: Mercury.

225-2494a8 Mercury Oem 80-100hp 4 Cylinder Inline 6 Flywheel Freshwater

( Manufacturer Part Number: 225-2494A8 ), ( Part Type: Cylinder Flywheel ), ( Country Of Origin: United States )

Review MERCURY Oem 80-100hp Cylinder Inline Flywheel Freshwater

The **Mercury 225-2494A8 80 100 HP Inline Four Cylinder Flywheel Freshwater Engine** is a robust and versatile powerplant designed to deliver reliable performance across a wide range of marine and industrial applications. Part of Mercury s proven line of outboard and inboard/outboard (I/O) engines, this inline four-cylinder unit combines precision engineering with high-efficiency fuel delivery to produce a smooth, torque-rich output between **80 and 100 horsepower**, making it an ideal choice for medium-duty boats, commercial vessels, and specialized equipment where consistent power and durability are essential. The **flywheel design** ensures seamless integration with transmission systems, reducing vibration and enhancing overall drivability, while the **freshwater-cooled** architecture prevents corrosion and extends engine life in demanding environments. Built with a **cast-iron cylinder block** and high-strength aluminum components, this engine is engineered to withstand the rigors of continuous operation, whether powering a fishing boat through rough seas, a workboat through heavy loads, or a stationary generator under sustained demand. Mercury s **EFI (Electronic Fuel Injection)** system optimizes fuel economy and emissions compliance, while the **direct ignition** setup ensures reliable starts even in challenging conditions. With a compact yet sturdy construction, this inline four-cylinder engine balances power density with operational efficiency, making it a dependable workhorse for both recreational and commercial users who demand performance without compromise. Whether paired with a sterndrive, inboard shaft, or auxiliary equipment, the **225-2494A8** delivers the strength and adaptability needed for demanding applications, all while maintaining Mercury s reputation for innovation and dependability.

The Mercury 225-2494A8 (80-100 HP, inline, flywheel, freshwater) is an outboard motor commonly used in small to mid-sized boats. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Reliability and Durability**

Mercury outboards are known for their robust construction and long-lasting performance, especially in the 80-100 HP range. This engine is designed for frequent use and can handle moderate to heavy loads, making it suitable for fishing, cruising, and light towing.

2. **Freshwater Cooling System**

The freshwater cooling system reduces corrosion and extends the life of the engine compared to raw water-cooled models. This is particularly advantageous in saltwater environments where corrosion can be a significant issue.

3. **Flywheel Design**

The flywheel design provides smoother operation and better power delivery, which can improve fuel efficiency and reduce vibration. This is beneficial for longer rides or when carrying passengers or cargo.

4. **Versatility**

This engine is versatile and can be paired with a variety of boat sizes, from small fishing boats to mid-sized cruisers. Its power range (80-100 HP) makes it suitable for both leisure and light utility tasks.

5. **Maintenance Accessibility**

Mercury outboards are well-maintained and have a reputation for ease of servicing. Parts are widely available, and mechanics are familiar with their design, which can reduce downtime and repair costs.

6. **Fuel Efficiency**

For its power range, the 225-2494A8 offers decent fuel efficiency, especially when used in moderate conditions. Proper maintenance can further enhance performance and efficiency.

7. **Brand Reputation**

Mercury is a trusted name in the marine industry, with a long history of producing high-quality outboard motors. This brand reputation often translates to better resale value and customer support.

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### **Cons**

1. **Age and Technology**

This model appears to be from an older generation of Mercury outboards (likely pre-2010s). Newer models incorporate advanced technologies such as electronic fuel injection, improved fuel efficiency, and quieter operation. If you prioritize cutting-edge features, you may find this engine lacking.

2. **Fuel Injection System**

Older models like this one often rely on carbureted systems or older fuel injection designs, which can be less efficient and more prone to issues like clogging or poor performance in varying conditions. Modern electronic fuel injection systems are more reliable and adaptable.

3. **Noise and Vibration**

While the flywheel helps, older outboards can still be noisier and more vibration-prone compared to newer, more refined models. This can be less comfortable for passengers and may not meet the expectations of those seeking a quieter ride.

4. **Environmental Regulations**

Older engines may not comply with the latest emissions standards, which could limit their use in certain areas or require additional modifications to meet regulations. This is particularly relevant if you plan to use the boat in environmentally sensitive regions.

5. **Parts and Service Costs**

While parts are widely available, the cost of maintaining an older model can add up over time. Replacement parts for newer models may be cheaper due to economies of scale, and labor costs for older engines can be higher due to the complexity of some components.

6. **Resale Value**

Older Mercury outboards generally have lower resale value compared to newer models. If you plan to sell the boat or engine in the future, this could be a drawback.

7. **Limited Advanced Features**

Modern outboards often include features like GPS integration, remote start, and digital dashboards. This model lacks such features, which may be important for modern boaters who value convenience and technology.

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### **Conclusion**

The Mercury 225-2494A8 is a solid, reliable choice for those seeking a durable and straightforward outboard motor for small to mid-sized boats. Its freshwater cooling system, flywheel design, and reputation for reliability make it a practical option for fishing, cruising, or light utility work. However, its age and lack of modern advancements may not appeal to boaters who prioritize fuel efficiency, noise reduction, or advanced features.

If you are looking for a budget-friendly, no-frills engine that will serve you well for years with proper maintenance, this model is a reasonable choice. On the other hand, if you want a more efficient, quieter, and technologically advanced engine, investing in a newer model even if it requires a higher upfront cost may be worth considering.

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### **Recommendation**

- **Buy the Mercury 225-2494A8 if:**

- You need a reliable, low-maintenance engine for a small to mid-sized boat.

- You prioritize durability and simplicity over advanced features.

- You are operating in freshwater or have a freshwater cooling setup.

- You are on a tight budget and can afford to invest in regular maintenance to keep the engine running smoothly.

- **Consider a newer model if:**

- You want better fuel efficiency and lower emissions.

- Noise and vibration are significant concerns for you or your passengers.

- You plan to use the boat frequently in saltwater, where corrosion resistance is critical.

- You value advanced features like electronic fuel injection, GPS integration, or digital diagnostics.

- You are looking to maximize resale value or plan to keep the boat/engine for an extended period.

Ultimately, the decision depends on your specific needs, budget, and how you plan to use the boat. If you are satisfied with the engine s capabilities and can commit to its maintenance, the Mercury 225-2494A8 is a dependable option. Otherwise, upgrading to a newer model may offer long-term benefits.

Details:

Good used OEM Mercury 80-100hp 4 cylinder Inline 6 Flywheel 225-2494A8 Freshwater. The engine this part came from was run in freshwater only.

part #: 2252494a8 price

  • $45.00

specifications ouboaen:

  • for makes: Mercury
  • mpn: 225-2494a8
  • part type: Cylinder Flywheel
  • country of origin: United States

seller ouboaen:

  • # reviews: 410
  • rating: 99.8%
  • city: Clarksville, Michigan

general ouboaen:

  • Boat Parts > Outboard Engines Components > Other
  • condition: Used

offer ouboaen:

  • options: Ship-to-home
  • sold: 0
  • availability: In Stock
  • started: February 19, 2026
  • quantity: 1

returns ouboaen:

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

payments ouboaen:

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

shipping ouboaen:

  • type: Fixed
  • service: Economy
  • class: Economy
  • transit: 4-7 Days
  • cost: $0.00
for makes: mercury, part type: cylinder flywheel, country of origin: united states,
category: boat parts > outboard engines components, sku: 22125265892826793,
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