MERCURY 855785A1 Fuel Cooler Optimax Dfi Outboard 135 150

( Manufacturer Part Number: 855785A1 ), ( Part Type: Fuel Hp Cooler )

Review MERCURY Used Oem Fuel Cooler Assy Optimax 135 150 Hp Dfi Outboard

Mercury 855785A1 Fuel Cooler Optimax (135-150 HP DFI Outboard)

The Mercury 855785A1 Fuel Cooler Optimax is a high-performance, integral component designed specifically for Mercury outboard engines with a power output of 135-150 HP DFI (Digital Fuels Injection). This fuel cooler is a testament to Mercury's commitment to delivering top-tier cooling solutions that enhance the overall efficiency and reliability of their outboard engines.

Crafted from durable materials, the Mercury 855785A1 Fuel Cooler Optimax is engineered to withstand the rigors of high-speed boating and prolonged use in harsh marine environments. Its compact design ensures a perfect fit with the Optimax series engines, while its innovative cooling technology helps maintain optimal fuel temperatures, thereby preventing the formation of harmful deposits and protecting the engine from thermal stress.

The Mercury 855785A1 Fuel Cooler Optimax operates on a heat exchange principle, utilizing the water surrounding the boat to cool the fuel. This design not only improves the fuel's stability and life but also ensures that the engine performs at its best, delivering consistent power output and improved fuel economy.

Installation of the Mercury 855785A1 Fuel Cooler Optimax is straightforward, thanks to its OEM-compatible design. It seamlessly integrates with the engine's existing cooling system, minimizing the need for additional modifications or components.

In summary, the Mercury 855785A1 Fuel Cooler Optimax is an essential upgrade for any Optimax series engine owner seeking to enhance their outboard's performance, reliability, and longevity. Its robust construction, efficient cooling technology, and easy installation make it an invaluable addition to your marine engine setup.

1. **Enhanced Performance:** This fuel cooler is designed to maintain consistent engine temperatures, which can improve overall performance and fuel efficiency.

2. **Reliability:** Mercury Marine is a well-established brand known for its durable products, and this fuel cooler is no exception.

3. **Compatibility:** It is specifically designed for Optimax outboard engines with a horsepower range of 135-150, ensuring a perfect fit.

4. **DIF (Digital Throttle & Shift) Integration:** The DFI (Digital Fuel Injection) integration allows for smooth and precise control of the engine.

1. **Potential High Cost:** Compared to some other fuel coolers, the Mercury 855785A1 may be more expensive.

2. **Installation Complexity:** While it is designed to fit Optimax engines, installation may require professional assistance, which can add to the cost.

3. **Limited Horsepower Range:** This fuel cooler is only suitable for engines within the 135-150 hp range. If your engine is outside this range, you may need to consider other options.

The Mercury 855785A1 Fuel Cooler Optimax is a high-quality, reliable product that can enhance the performance of your Optimax outboard engine. However, its high cost and potential need for professional installation might be drawbacks for some users. If you can accommodate these factors, this fuel cooler could be a valuable addition to your outboard engine. If you're on a tight budget or need a fuel cooler for a different horsepower range, you may want to explore other options.

Details:

Guaranteed Fully Functional. Condition: Good Used Condition. Location:Bollix, Ms. Please See Pictures.

Part #: 855785A1. Inventory: WW Tote 72. Fits various Mercury Optimax DFI 135 150 Hp Outboard Engines. Serial Range OG590000 to OG760299.

May fit more model's. Part: Mercury Optimax Fuel Cooler Assembly with Connecting Hoses.

part #: 855785a1 price

• $102.00

specifications ouboaen:

• for makes: Mercury
• mpn: 855785a1
• part type: Fuel Hp Cooler

offer ouboaen:

• availability: In Stock
• sold: 0
• started: December 16, 2025
• options: Ship-to-home
• best offers: True
• quantity: 1

general ouboaen:

• Boat Parts > Outboard Engines Components > Electrical Systems
• condition: Used

shipping ouboaen:

• cost: $14.95
• transit: 3-7 Days
• type: Fixed
• service: Standard
• class: Standard

seller ouboaen:

• rating: 100.0%
• city: Biloxi, Mississippi
• # reviews: 2469

payments ouboaen:

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

returns ouboaen:

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

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