MERCURY 8564822 Ecm Ecu Carb 8560582 0670

( Manufacturer Part Number: 8564822 ), ( Part Type: Ecm Ecu ), ( Disclaimer: All Parts Come As Pictured. ), ( Country Of Origin: United States )

Review MERCURY Month Warranty Oem Ecm Ecu Stroke Carb

The **Mercury 8564822 8560582 ECM/ECU (Engine Control Module) and Carburetor Combination (Part #0670)** is a specialized aftermarket tuning solution designed to enhance the performance, drivability, and fuel efficiency of select Mercury marine engines, particularly those from the mid-2000s through the early 2010s. This integrated system merges a high-performance **ECM (Electronic Control Module)** with a carefully calibrated **carburetor**, offering a seamless upgrade for both stock and modified outboards. The **8564822 ECM** is engineered to provide precise fuel delivery, ignition timing, and throttle response, ensuring optimal engine operation under varying loads, speeds, and environmental conditions. Its advanced algorithms adapt to real-time sensor inputs, such as water temperature, load, and throttle position, to maintain peak performance while minimizing wear and tear on critical components. Pairing this with the **8560582 carburetor** a high-flow, precision-machined unit delivers a balanced air-fuel mixture, reducing hesitation, improving throttle response, and enhancing overall power output. The **0670 combination kit** is particularly well-suited for engines that require a blend of electronic control and mechanical tuning, such as those in Mercury s **4.6L V8, 5.0L V8, or 6.4L V8 series**, where stock systems may struggle with modern fuel standards or high-performance modifications. Whether used for stock restorations, fuel economy improvements, or aggressive tuning, this ECM/carburetor pairing ensures a reliable, high-performance upgrade that adheres to Mercury s original design intent while pushing boundaries for better efficiency and power. Installation is straightforward, requiring minimal modifications to existing wiring harnesses and fuel lines, making it an accessible yet powerful solution for both DIY enthusiasts and professional marine technicians.

The **Mercury 8564822/8560582 ECM/ECU/Carburetor (0670)** is a component used in older Mercury outboard motors, particularly from the mid-1990s to early 2000s. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of Buying a Used/Aftermarket Mercury 8564822/8560582 ECM/ECU/Carburetor (0670)**

1. **Compatibility with Classic Engines**

- This unit is designed specifically for Mercury outboards from that era, ensuring proper fitment with minimal modifications. It is commonly found in models like the **Mercury 4.3L, 5.0L, and 6.0L V8 engines** (e.g., 400 600 HP series from the late '90s to early 2000s).

- If you own a boat with one of these engines, replacing a failing original ECM or carburetor with this unit avoids the need for a full engine swap.

2. **Cost-Effective Repair Option**

- Replacing an entire engine or ECM can be expensive (often $3,000 $8,000 ). A used or aftermarket ECM/carburetor unit in this range typically costs **$500 $2,000**, making it a far more affordable solution for restoring performance.

- If the issue is purely electronic (e.g., failed ECU, sensor problems, or wiring issues), this unit may resolve the problem without needing a full engine rebuild.

3. **Potential for Improved Reliability**

- Some aftermarket or remanufactured units undergo testing and calibration to match or exceed OEM specifications. If sourced from a reputable dealer, this could mean fewer long-term issues compared to a failing original part.

- In cases where the original carburetor or ECM has been damaged by water, corrosion, or electrical failure, a replacement unit can restore functionality.

4. **Easier to Source Than Full Engines**

- Full Mercury engines from that era are rare and expensive. The ECM/carburetor unit is a smaller, more commonly available part, especially in the used market or through specialty marine repair shops.

- Online marketplaces (e.g., Facebook Marketplace, eBay, or marine forums) often have listings for these units, sometimes with minimal effort required to locate a match.

5. **DIY-Friendly Replacement**

- Swapping an ECM or carburetor is generally a more straightforward job than a full engine replacement. It requires basic mechanical skills, proper wiring knowledge, and sometimes recalibration (if the unit is new or remanufactured).

- Many boat owners or mechanics can handle this repair without needing a dealership, saving on labor costs.

6. **Potential for Performance Tuning**

- Some aftermarket ECM units come with tunable software, allowing for adjustments to fuel delivery, ignition timing, or emissions settings. This can be useful for restoring stock performance or even slight power gains (though this is rare for these older models).

- If the original carburetor was modified or adjusted for performance, a replacement unit can be set up similarly.

7. **Avoiding Long-Term Engine Failure**

- In some cases, a failing ECM or carburetor can lead to catastrophic engine failure if ignored. Replacing it early can prevent a more expensive breakdown later.

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### **Cons of Buying a Used/Aftermarket Mercury 8564822/8560582 ECM/ECU/Carburetor (0670)**

1. **Age and Wear of Used Units**

- Many of these units are **15 25 years old**, meaning they may have internal wear, corroded contacts, or failing sensors. A used ECM/carburetor could fail shortly after installation if not thoroughly inspected.

- Carburetors, in particular, can develop leaks, clogged jets, or worn seals over time, leading to poor performance or stalling.

2. **Lack of Original Calibration**

- Original ECUs are factory-calibrated for specific engine conditions. A used or aftermarket unit may not be properly calibrated for your engine s exact setup, leading to rough idling, poor throttle response, or even stalling.

- Some units require reprogramming or tuning to match the engine s sensors and load conditions.

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

- The aftermarket for marine ECM units is not as tightly regulated as it is for modern vehicles. Some sellers may offer **counterfeit or poorly remanufactured units** that fail quickly or cause electrical issues.

- Carburetors from unknown sources may use substandard materials or incorrect tolerances, leading to leaks or poor fuel delivery.

4. **Compatibility Issues**

- While this unit is designed for Mercury engines, slight variations exist between models (e.g., 4.3L vs. 5.0L). A mismatched unit could cause **electrical conflicts, sensor errors, or even damage to the engine s computer system**.

- Wiring harnesses or connector pins may not align perfectly, requiring modifications or additional work.

5. **Limited Availability of Spare Parts**

- Unlike newer vehicles, finding replacement sensors, wiring harnesses, or seals for these older ECM/carburetor units can be difficult. If the unit fails again, sourcing parts may be time-consuming or expensive.

- Some aftermarket units may not include all necessary components (e.g., gaskets, O-rings, or mounting hardware), requiring additional purchases.

6. **Potential for Emissions or Legal Issues**

- Older Mercury engines from this era were not designed with modern emissions regulations in mind. If your boat operates in areas with strict emissions laws (e.g., some marinas or lakes), a poorly calibrated or modified ECM/carburetor could lead to **fines or registration issues**.

- Some aftermarket ECUs may not meet EPA or state requirements for emissions compliance.

7. **Risk of Electrical Problems**

- These units rely on **analog sensors and wiring**, which can degrade over time. Corrosion, broken wires, or failing connectors are common in marine environments. A used unit may introduce new electrical issues if not properly tested.

- If the original wiring harness is damaged, replacing just the ECM/carburetor without fixing the wiring can lead to persistent problems.

8. **Limited Longevity Compared to Modern Units**

- Modern ECUs and fuel injection systems are far more durable and reliable than their late-'90s counterparts. A replacement unit may still fail in **5 10 years**, especially if exposed to saltwater, vibration, or poor maintenance.

- Carburetors, in particular, are less efficient and prone to clogging compared to modern fuel injection systems.

9. **Learning Curve for Installation and Tuning**

- Swapping an ECM or carburetor requires **understanding engine wiring, sensor calibration, and fuel delivery systems**. Mistakes during installation (e.g., incorrect sensor connections) can cause **hard starts, no-start conditions, or engine damage**.

- Tuning a new or remanufactured unit may require specialized software or a marine technician s expertise.

10. **No Warranty or Support**

- Used units typically come with **no warranty**, meaning you bear all risks if the part fails. Aftermarket units may offer limited warranties, but support for older models can be difficult to find.

- If the unit fails shortly after purchase, you may be left without recourse.

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### **Conclusion**

The **Mercury 8564822/8560582 ECM/ECU/Carburetor (0670)** can be a **cost-effective and practical solution** for restoring or repairing an older Mercury outboard engine, especially if the issue is purely electronic or carburetor-related. It avoids the expense of a full engine replacement and can breathe new life into a boat that might otherwise be considered a write-off.

However, the **risks of age, calibration issues, compatibility problems, and limited longevity** make this a **high-risk, high-reward** purchase. Used units may fail quickly, and aftermarket parts can be hit-or-miss in quality. If you proceed, **thoroughly inspect the unit, test it before installation, and consider professional tuning** to ensure proper functionality.

For **long-term reliability**, a **full engine rebuild or replacement with a modern outboard** (if budget allows) would be a safer bet. If you re working with a **well-documented, tested unit from a trusted source** and are prepared for potential tuning challenges, this repair can be a smart investment.

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### **Recommendation**

- Purchase a **used unit from a reputable seller** (e.g., a marine mechanic, trusted online forum, or dealership trade-in).

- **Test the unit thoroughly** before installation check for proper sensor readings, no electrical shorts, and clean fuel delivery.

- **Have a marine technician inspect the wiring and connectors** to ensure compatibility.

- Be prepared for **potential tuning adjustments** post-installation.

- Consider a **full engine rebuild** or **replacement with a newer outboard** (e.g., Mercury s Verado or FourStroke series), which will eliminate long-term issues.

- If you must use this

Details:

In good condition. Removed from a 1998 mariner 25 hp 4 stroke Bigfoot outboard.

part #: 8564822 prices

• $399.99-$474.99

specifications ouboaen:

• for makes: Mercury
• mpn: 8564822
• part type: Ecm Ecu
• disclaimer: All Parts Come As Pictured.
• country of origin: United States

seller ouboaen:

• # reviews: 888
• rating: 100.0%
• city: Sacramento, California

returns ouboaen:

• policy: No Returns

shipping ouboaen:

• service: USPS Priority Mail
• class: Expedited
• cost: $0.00
• carrier: USPS
• type: Calculated
• transit: 4-8 Days

payments ouboaen:

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

offer ouboaen:

• quantity: 1
• sold: 0
• options: Ship-to-home
• started: April 14, 2026
• best offers: True
• availability: In Stock

general ouboaen:

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

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