MERCURY 16066004 Outboard Crank Position Sensor 9.9

( Manufacturer Part Number: 16066004 ), ( Part Type: Hp Crank Sensor )

Review MERCURY 9.9 Hp Stroke Outboard Crank Position Sensor

The **Mercury 16066004 9.9 Horsepower Outboard Crank Position Sensor** is a precision-engineered component designed to ensure optimal performance and reliability in Mercury s line of 9.9 HP outboard motors, particularly those equipped with electronic fuel injection (EFI) systems. This sensor plays a critical role in the engine s ignition and fuel delivery processes by monitoring the position of the crankshaft in real time, allowing the engine control module (ECM) to precisely time spark plugs and fuel injectors for maximum efficiency and power output. Crafted from high-quality materials, including a durable housing and a robust magnetic or inductive element, this sensor is built to withstand the demanding conditions of marine environments, including exposure to saltwater, moisture, and temperature fluctuations. Its compact yet rugged design ensures seamless integration into the engine s internal architecture, where it interfaces directly with the flywheel or crankshaft pulley to provide accurate rotational data. Whether installed on a compact fishing boat, a utility vessel, or a recreational watercraft, this crank position sensor contributes to smoother operation, reduced emissions, and enhanced fuel economy by enabling the engine to maintain optimal performance across varying loads and speeds. For marine enthusiasts and professionals alike, this component represents a vital part of Mercury s commitment to delivering dependable, high-performance outboard motors that balance power with precision engineering.

The **Mercury 16066004 9.9 HP Outboard Crank Position Sensor** is a critical component for the proper functioning of your engine. Below are the key pros and cons of purchasing this part, followed by a conclusion and recommendation.

### **Pros of buying a Mercury 16066004 Crank Position Sensor**

1. **Direct Compatibility** This sensor is specifically designed for Mercury outboards, particularly the 9.9 HP models, ensuring a perfect fit without modification. It eliminates the risk of purchasing a generic or mismatched part that may not work correctly.

2. **Reliable Performance** Mercury Marine is a well-known brand with a reputation for quality and durability. The crank position sensor is engineered to provide accurate readings, which are essential for proper engine timing, fuel injection, and overall performance.

3. **Prevents Engine Damage** A faulty crank position sensor can lead to misfires, poor fuel economy, or even engine failure if left unaddressed. Replacing it with an OEM part ensures that your engine operates smoothly and reduces the risk of costly repairs.

4. **Easy Installation** Since it is an OEM part, it is designed to be straightforward to install, often requiring only basic tools. Many users report that replacing the sensor takes less than an hour, especially if they have experience with small engine repairs.

5. **Warranty Coverage** If purchased from an authorized dealer or directly from Mercury, the sensor may come with a warranty, providing peace of mind in case of defects.

6. **Improves Engine Longevity** A properly functioning crank position sensor helps maintain optimal engine performance, reducing wear and tear on other components like the ignition system, fuel pump, and ECU.

7. **Cost-Effective Long-Term Solution** While the upfront cost may seem higher than aftermarket alternatives, an OEM sensor is built to last, reducing the need for frequent replacements and potential diagnostic issues.

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### **Cons of buying a Mercury 16066004 Crank Position Sensor**

1. **Higher Upfront Cost** Compared to aftermarket or generic sensors, the OEM part from Mercury tends to be more expensive. This may be a deterrent for budget-conscious buyers, though the long-term benefits often justify the cost.

2. **Limited Availability Outside Authorized Sources** While widely available through Mercury dealers and reputable marine supply stores, it may be harder to find from non-authorized sellers, especially online marketplaces where counterfeit or incompatible parts could be sold.

3. **Potential Overkill for Minor Issues** If the sensor failure is due to a minor electrical issue (e.g., loose wiring, corroded connectors), replacing the entire sensor may be unnecessary. A thorough diagnosis could save money if the problem is elsewhere.

4. **Installation Challenges for Inexperienced Users** While the installation is generally simple, those without mechanical experience may struggle with tasks like removing the old sensor, cleaning the mounting area, or ensuring proper wiring connections. This could lead to frustration or improper installation.

5. **Depreciation Risk** Like all marine parts, the sensor may lose value over time, especially if the engine is older. If you plan to sell the boat later, the cost of the sensor may not be fully recouped.

6. **Possible Counterfeit Parts** Purchasing from untrusted sellers (e.g., unverified eBay or Amazon listings) increases the risk of receiving a fake or low-quality sensor that fails prematurely. Always buy from authorized dealers or well-reviewed suppliers.

7. **Not a Permanent Fix for Underlying Issues** If the engine has other problems (e.g., worn spark plugs, fuel system issues, or ECU malfunctions), replacing just the sensor may not resolve the root cause. A full diagnostic check is advisable.

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### **Conclusion**

The **Mercury 16066004 9.9 HP Outboard Crank Position Sensor** is a high-quality, reliable part that ensures proper engine function and prevents costly damage. While it comes at a higher price than aftermarket alternatives, its compatibility, durability, and performance benefits make it a strong choice for serious boat owners. The installation is manageable for those with basic mechanical skills, and purchasing from an authorized source minimizes the risk of counterfeit parts.

However, if budget is a major concern, a thorough diagnosis should be performed first to confirm that the sensor is indeed the issue. Additionally, inexperienced users may want to consult a professional mechanic for installation to avoid mistakes.

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### **Recommendation**

- You have confirmed that the sensor is faulty through diagnostic testing.

- You prioritize reliability and long-term engine health over short-term cost savings.

- You are purchasing from an authorized dealer or a trusted supplier to avoid counterfeit parts.

- You are comfortable with basic installation or have access to a mechanic for assistance.

- The issue is minor (e.g., wiring or connector problems) and can be fixed more cheaply.

- You are on a tight budget and are willing to take the risk of using a high-quality aftermarket sensor (e.g., from brands like **Seafoam, Universal Marine, or Delco**).

- You lack mechanical experience and are unsure about proper installation.

**Final Verdict:** For most boat owners, the **Mercury 16066004 sensor is the best choice** due to its reliability and compatibility. However, always verify the problem first and ensure you re buying from a reputable source to maximize value.

Details:

Ready to install.

part #: 16066004 prices

• $14.50-$39.13

specifications ouboaen:

• for makes: Mercury
• mpn: 16066004
• part type: Hp Crank Sensor

shipping ouboaen:

• carrier: USPS
• class: Standard
• type: Fixed
• service: USPS Ground Advantage
• transit: 6-12 Days
• cost: $0.00

seller ouboaen:

• city: Calabash, North Carolina
• rating: 100.0%
• # reviews: 312

offer ouboaen:

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

returns ouboaen:

• policy: No Returns

general ouboaen:

• condition: Used
• Boat Parts > Outboard Engines Components > Ignition Starting Systems

payments ouboaen:

• other
• credit card: Visa
• wallet: Paypal

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