MOTORCRAFT D3AF-RB Carburetor 2100 1.21 2-BARREL V-8

( Brand: Motorcraft ), ( Manufacturer Part Number: D3AF-RB ), ( Type: Carb ), ( Oe/oem Part Number: 1974 )

Review MOTORCRAFT 1.21 2-barrel Carburetor Ford Mercury V-8 fits 351 400 1973

Introducing the Motorcraft D3AF-RB 2100 1.21 2-barrel carburetor, an essential component for the 1973 Ford Mercury 351 400 V-8 engine. This Motorcraft carburetor is a direct factory replacement, ensuring a perfect fit and reliable performance.

The D3AF-RB 2100 carburetor is a 2-barrel design with a gross air flow capacity of 2100 CFM (cubic feet per minute). It features a primary venturi with a bore size of 1.21 inches and a secondary venturi with a bore size of 1.71 inches. This specific carburetor is uniquely calibrated for Ford Mercury 351 400 V-8 engines, ensuring optimal engine performance and fuel economy.

This carburetor comes equipped with several key features designed for enhanced functionality and ease of use. Its automatic choke system ensures easy starting in various weather conditions. Additionally, its secondary enrichment circuit ensures proper idle and cruising performance, even under load.

The Motorcraft D3AF-RB 2100 carburetor is meticulously crafted with precision machined components for consistent performance and long-lasting durability. Its heavy-duty cast aluminum body is designed to withstand the rigors of daily driving. Furthermore, its adjustable primary and secondary fuel mixture control allows for easy fine-tuning to meet individual driving preferences and engine conditions.

The Motorcraft D3AF-RB 2100 1.21 2-barrel carburetor also includes a factory-installed air cleaner base and mounting hardware for a seamless installation experience. Its smooth, easy-to-use design makes it an ideal choice for Ford Mercury 351 400 V-8 enthusiasts seeking reliable and efficient carburetor performance.

In summary, the Motorcraft D3AF-RB 2100 1.21 2-barrel carburetor is a high-quality, factory-calibrated carburetor specifically designed for the 1973 Ford Mercury 351 400 V-8 engine. Its 2100 CFM air flow capacity, automatic choke system, secondary enrichment circuit, and adjustable fuel mixture control make it a top choice for those seeking optimal engine performance, fuel economy, and ease of use.

Buying a Motorcraft D3AF-RB 2100 1.21 2-barrel carburetor for a 1973 Ford Mercury 351 400 V-8 engine comes with both advantages and disadvantages. Here's a detailed analysis:

1. Authenticity: This carburetor is an original Motorcraft part, which adds to the authenticity and value of your classic Ford Mercury.

2. Reliability: Motorcraft is a Ford subsidiary and has been producing high-quality parts for Ford vehicles since 1912. This carburetor is likely to provide reliable performance.

3. Availability: Motorcraft parts are widely available through Ford dealerships and other automotive parts suppliers.

4. Fitment: This carburetor is designed specifically for the 1973 Ford Mercury 351 400 V-8 engine, ensuring a perfect fit and minimizing the need for modifications.

1. Cost: Original Motorcraft parts can be more expensive than aftermarket alternatives.

2. Complexity: 2-barrel carburetors are more complex than single-barrel carburetors, requiring more adjustments and maintenance.

3. Performance: Some enthusiasts argue that aftermarket carburetors offer better performance and ease of tuning compared to original equipment.

4. Availability of spares: Original parts like gaskets, jets, and other components may be harder to find and more expensive than their aftermarket counterparts.

The decision to buy a Motorcraft D3AF-RB 2100 1.21 2-barrel carburetor for your 1973 Ford Mercury 351 400 V-8 ultimately depends on your priorities. If you value authenticity, reliability, and perfect fitment, then buying an original Motorcraft carburetor is a good choice. However, if you're looking for the best performance, ease of tuning, and cost-effectiveness, then an aftermarket carburetor may be a better option.

If you prioritize performance and ease of tuning, consider exploring aftermarket carburetor options. However, if you value authenticity and reliability, then purchasing a Motorcraft D3AF-RB 2100 1.21 2-barrel carburetor for your 1973 Ford Mercury 351 400 V-8 is a recommended choice.

Details:

Core for parts. Linkage is froze tight from sitting. Please verify part number and pictures match your application. Fuel bowl is casting number 1.21.

Motorcraft 2100 2-barrel carburetor, no ID tag but lower ear is stamped 3A RB. Air horn has a casting broke off from handling. See pics for condition.

part #: d3af prices

• $65.99-$329.99

specifications carbcoon:

• for models: 351, 400
• for makes: Ford, Mercury
• for years: 1973
• brand: Motorcraft
• mpn: D3af-rb
• type: Carb
• oe/oem part number: 1974

shipping carbcoon:

• transit: 3-7 Days
• cost: $0.00
• carrier: USPS
• class: Standard
• type: Calculated
• service: USPS Ground Advantage

returns carbcoon:

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

offer carbcoon:

• availability: In Stock
• options: Ship-to-home
• quantity: 1
• sold: 0
• best offers: True
• started: August 19, 2025

seller carbcoon:

• city: Sheboygan Falls, Wisconsin
• # reviews: 30733
• rating: 100.0%

general carbcoon:

• Car Truck Parts Accessories > Air Fuel Delivery > Carburetors
• condition: For parts or not working

payments carbcoon:

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

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