FORD V309 Bwd Distributor Vacuum Advance Control Nos DR-309 For 289 V8

( Brand: Ford ), ( Manufacturer Part Number: V309 ), ( Type: Distributor Vacuum Advance ), ( Ipn: Dr-309 ), ( Oe/oem Part Number: C5az12370a ), ( Color: Silver ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review FORD Bwd Distributor Vacuum Advance Control Mercury 289 V8 Nos fits 352 390

The Ford DR-309 BWD V309 distributor vacuum advance control is a crucial component in the ignition system of Mercury 289, 352, and 390 V8 engines. This vacuum advance unit is specifically designed to provide optimal engine performance by adjusting the timing of the spark plug firing based on engine vacuum.

The DR-309 distributor vacuum advance control is manufactured to meet OEM (Original Equipment Manufacturer) specifications for Mercury engines. It features a robust design with a durable cast aluminum housing that ensures long-lasting reliability. The internal components, including the diaphragm, vacuum bellows, and valves, are meticulously crafted to deliver precise and consistent vacuum advance adjustment.

The vacuum advance control utilizes a diaphragm-operated mechanical design that responds directly to engine vacuum fluctuations. As engine vacuum increases during intake strokes, the diaphragm is pushed inward, causing the vacuum advance mechanism to advance the timing of the spark plugs. This advancement in timing enhances the engine's efficiency and power output by improving the combustion process.

The Ford DR-309 BWD V309 distributor vacuum advance control comes in a new old stock (NOS) condition, meaning it is a new, unused part that was produced during the original manufacturing period of these engines. This makes it an excellent choice for restoration projects, engine rebuilds, or for those seeking authentic, original parts for their classic Mercury vehicles.

Installing the DR-309 distributor vacuum advance control is a straightforward process, but it is essential to follow the proper installation instructions to ensure optimal performance. The included hardware and gaskets make the installation process more convenient, and the unit is compatible with both left- and right-hand distributors.

In summary, the Ford DR-309 BWD V309 distributor vacuum advance control is a vital component in the ignition system of Mercury 289, 390, and 352 V8 engines. Its robust design, precise vacuum advance adjustment, and NOS condition make it an excellent choice for those seeking optimal engine performance, authenticity, and long-lasting reliability.

Pros and Cons of Buying a Ford DR-309 BWD V309 Distributor Vacuum Advance Control for Mercury 289, 352, 390 V8 Engines

The Ford DR-309 BWD V309 distributor vacuum advance control is a crucial component in the ignition system of Mercury 289, 352, and 390 V8 engines. This part helps ensure optimal engine performance by advancing the ignition timing in response to engine vacuum. In this article, we'll discuss the key advantages and disadvantages of purchasing this distributor vacuum advance control.

1. Improved Engine Performance: By properly advancing the ignition timing, the Ford DR-309 BWD V309 distributor vacuum advance control helps deliver better combustion efficiency, leading to improved engine performance.

2. Enhanced Power Output: The improved combustion efficiency can translate to increased power output from the engine, making it a valuable upgrade for performance enthusiasts.

3. Smoother Idle: Correctly functioning vacuum advance control can contribute to a smoother idle, as the ignition timing is adjusted to maintain optimal engine performance under various load conditions.

4. Original Equipment Manufacturer (OEM) Quality: This Ford part is an original equipment manufacturer (OEM) replacement, ensuring that it meets the same specifications and quality standards as the original component.

5. Long-Lasting Design: The Ford DR-309 BWD V309 distributor vacuum advance control is designed to be durable and long-lasting, reducing the need for frequent replacements.

1. Cost: This OEM replacement part can be quite expensive compared to aftermarket alternatives.

2. Complex Installation: Installing the Ford DR-309 BWD V309 distributor vacuum advance control may require advanced mechanical skills, particularly if you are not familiar with the intricacies of your Mercury engine's ignition system.

3. Potential Compatibility Issues: While this part is designed to fit Mercury 289, 352, and 390 V8 engines, there is a possibility of compatibility issues depending on the specific model and year of the vehicle.

4. Limited Availability: The Ford DR-309 BWD V309 distributor vacuum advance control may not be readily available at all auto parts retailers, requiring you to search for it at specialty stores or online marketplaces.

The Ford DR-309 BWD V309 distributor vacuum advance control is an essential component for maintaining optimal engine performance in Mercury 289, 352, and 390 V8 engines. While it comes with some advantages like improved engine performance, enhanced power output, and smoother idle, it also has drawbacks such as cost, complex installation, potential compatibility issues, and limited availability. Ultimately, the decision to purchase this part depends on your specific needs, mechanical skills, and budget.

If you are a professional mechanic or a dedicated enthusiast with the necessary skills and resources, purchasing the Ford DR-309 BWD V309 distributor vacuum advance control can be an excellent investment for your Mercury V8 engine. However, if you are a casual driver or inexperienced in engine mechanics, it might be more practical to consider aftermarket alternatives or consult a professional mechanic before making a decision.

Details:

New Old Stock.

specifications disripa:

• for models: 352, 390
• for makes: Mercury, Ford
• brand: Ford
• mpn: V309
• type: Distributor Vacuum Advance
• ipn: Dr-309
• oe/oem part number: C5az12370a
• color: Silver
• vintage part: Yes
• country of origin: United States

payments disripa:

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

seller disripa:

• rating: 99.8%
• city: Birmingham, Alabama
• # reviews: 4094

offer disripa:

• quantity: 1
• availability: In Stock
• started: May 5, 2026
• options: Ship-to-home
• sold: 0

shipping disripa:

• transit: 4-10 Days
• carrier: USPS
• class: Standard
• type: Calculated
• cost: $6.58
• service: USPS Ground Advantage

returns disripa:

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

general disripa:

• Car Truck Parts Accessories > Ignition Systems Components > Distributors
• condition: New

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