MERCURY 8M0042790 Standard Midsection Water Tube 32-859097 2.5L V6 3/4IN

( Manufacturer Part Number: 8M0042790 ), ( Part Type: Tube ), ( Country Of Origin: United States )

Review MERCURY 2.5l V6 Standard Midsection Water Tube 3/4in Long fits 2018

The **Mercury 8.0 HP 32-859097 2.5L V6 Standard Midsection Water Tube Outboard Motor** is a robust and high-performance marine propulsion system designed for serious anglers, boaters, and recreational enthusiasts seeking reliability, efficiency, and cutting-edge technology. Engineered with Mercury s signature precision, this **2.5-liter V6 outboard** delivers a smooth, powerful output of **8.0 horsepower**, making it ideal for mid-sized boats ranging from 16 to 20 feet in length, particularly those equipped with a **18 3/4-inch shaft** for optimal torque and propulsion. The **standard midsection design** ensures a balanced and streamlined installation, reducing drag and improving fuel economy while maintaining exceptional maneuverability. This motor features Mercury s **advanced water-cooled cylinder heads**, which enhance thermal efficiency and longevity by dissipating heat effectively, even during prolonged use in demanding conditions. The **V6 architecture** provides a refined balance of power and torque, delivering consistent performance whether cruising at moderate speeds or accelerating quickly for fishing or evasive maneuvers. Built with durability in mind, the **32-859097 model** incorporates high-strength materials, including corrosion-resistant coatings and precision-engineered components, ensuring resistance to saltwater corrosion a critical feature for saltwater applications. The **standard midsection configuration** also allows for easy maintenance access, with straightforward procedures for oil changes, spark plug replacements, and other routine upkeep, reducing downtime and extending the motor s operational lifespan. Whether powering a versatile bass boat, a reliable center console, or a dependable fishing vessel, this outboard combines **smooth operation, fuel efficiency, and rugged reliability**, making it a standout choice for those who demand performance without compromise. With Mercury s reputation for innovation and performance, this motor is a testament to the brand s commitment to delivering a seamless boating experience for both casual and serious anglers alike.

### Pros and Cons of buying a Mercury 8.0L 2.5L V6 (Midsection Water Tube, 18.75" Prop)

The 8.0L V6 engine delivers strong torque and horsepower, making it suitable for larger boats, fishing vessels, and recreational use. The 2.5L displacement ensures reliable performance for mid-sized applications.

Mercury marine engines are known for their robust construction, particularly in the midsection and water tube designs, which help dissipate heat efficiently. This reduces the risk of overheating in demanding conditions.

While not as fuel-efficient as smaller outboards, the 8.0L V6 is more economical than larger marine engines of similar power output, making it a balanced choice for boats requiring moderate to high thrust.

The 18.75-inch propeller is well-suited for a variety of tasks, including fishing, cruising, and light towing. The midsection design allows for easier maintenance and access to critical components.

Mercury engines are engineered to withstand saltwater corrosion, saltwater intake systems, and harsh marine conditions, which is essential for long-term use in boats.

As a widely used engine, parts and service support are readily available. Mercury dealers and independent mechanics can easily source replacements and perform repairs.

The V6 configuration typically offers smoother power delivery compared to inline engines, reducing vibration and improving ride comfort.

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The 8.0L V6 is more expensive upfront compared to smaller outboards (e.g., 4.6L or 6.0L engines). This may be a barrier for budget-conscious buyers or those operating smaller boats.

While better than larger engines, the 8.0L V6 still consumes more fuel than smaller outboards. Operators should budget for higher fuel expenses, especially for extended trips.

Larger engines require more frequent maintenance, including oil changes, filter replacements, and cooling system checks. The midsection water tube design, while efficient, may need occasional cleaning to prevent clogging.

The engine is heavier and bulkier than smaller outboards, which may limit installation options on smaller boats or require structural reinforcements.

While generally smooth, larger V6 engines can produce more noise and vibration compared to smaller, more refined outboards. This may affect passenger comfort on extended trips.

The 18.75-inch propeller is optimal for this engine but may not be ideal for all applications. Mismatched propellers can reduce efficiency or cause excessive wear on the engine.

Like all marine engines, the 8.0L V6 depreciates over time. While Mercury engines retain value reasonably well, they may not recoup as much as newer or more fuel-efficient models.

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The Mercury 8.0L 2.5L V6 (midsection water tube, 18.75" prop) is a **strong, reliable choice for mid-sized to larger boats** requiring moderate to high power output. It excels in durability, performance, and adaptability to marine conditions, making it ideal for fishing, cruising, or light towing. However, its **higher upfront cost, fuel consumption, and maintenance needs** may outweigh its benefits for smaller boats or budget-conscious buyers.

If you prioritize **power, longevity, and ease of use** in a boat that can handle the engine s demands, this is a solid investment. Conversely, if you operate a smaller vessel or seek greater fuel efficiency, a smaller outboard (e.g., 4.6L or 6.0L) might be a more practical option.

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- You own a **larger boat (e.g., 20 feet)** that requires robust power for fishing, cruising, or light towing.

- You operate in **demanding conditions** (e.g., rough waters, frequent use) where reliability and heat dissipation are critical.

- You can **budget for higher fuel and maintenance costs** and have access to proper service support.

- Your boat is **smaller than 18 feet**, as the engine may be overpowered or impractical to install.

- You prioritize **fuel efficiency** and plan to use the boat frequently for short trips.

- You lack **storage or maintenance facilities** capable of handling a larger marine engine.

For most **mid-sized recreational or fishing boats**, this engine strikes a good balance between performance and practicality, provided the buyer is prepared for its demands. If unsure, consult a marine mechanic to assess compatibility with your specific vessel.

Details:

I included a measurement in the picture and part number is 32 859097. Sold individually. I have multiple available so the color may differ slightly from one in pictures, but all great shape. Copper water tube for the standard Mercury 2.5 L midsection.

part #: 8m0042790 prices

• $24.99-$45.00

specifications ouboaen:

• for makes: Mercury
• for years: 2018
• mpn: 8m0042790
• part type: Tube
• country of origin: United States

offer ouboaen:

• sold: 0
• availability: In Stock
• started: May 8, 2026
• quantity: 3
• options: Ship-to-home

returns ouboaen:

• policy: No Returns

seller ouboaen:

• rating: 99.7%
• # reviews: 1791
• city: Lenoir City, Tennessee

shipping ouboaen:

• class: Standard
• carrier: USPS
• type: Calculated
• transit: 4-10 Days
• service: USPS Ground Advantage
• cost: $15.10

general ouboaen:

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

payments ouboaen:

• credit card: Mastercard
• other
• wallet: Paypal

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