CARTER 120P-401 Carburetor Jets Afb 0.101 4-BBL

( Brand: Carter ), ( Part Type: Jet Carburetor ), ( Manufacturer Part Number: 120P-401 )

Review CARTER Carburetor Metering Main Jets 0.101 Inch Size Afb

The Carter YF Series 120P-401 Carburetor Jet is a critical component in the fuel delivery system of a 4-barrel, Accelerator Pump (AFB) carburetor. This jet is specifically designed for use with a fuel mixture having a gravity flow rate of 22.6 degrees API and a fuel temperature ranging from 50 F to 100 F (10 C to 38 C).

Measuring just 0.101 inches in diameter, this jet allows for precise fuel metering and delivery to the carburetor's metering rods, ensuring optimal engine performance. The jet has a thread size of 5/16-18 UNF and features a conical tip design, which facilitates efficient fuel atomization and mixing with the air stream as it enters the venturi.

This Carter jet is meticulously crafted from high-quality materials, ensuring durability and reliability even under the most demanding operating conditions. It is crucial to maintain a consistent fuel mixture for proper engine performance, and the Carter 120P-401 Carburetor Jet plays a vital role in achieving that balance.

If you are experiencing issues with your carburetor, such as poor fuel economy, uneven idle, or rough engine performance, a worn or damaged jet may be the culprit. By replacing the jet with a new Carter 120P-401, you can restore optimal fuel delivery and improve overall engine performance.

Installing the new jet is a relatively simple process, but it is essential to follow the proper procedures and use the appropriate tools to avoid damaging the carburetor or other components. Before removing the old jet, make sure to drain the fuel system and disconnect the battery to prevent accidental ignition. Once you have accessed the jet, carefully remove it using a jet removal tool or pliers, and thread in the new Carter 120P-401 jet by hand before tightening it to the recommended torque specification.

In conclusion, the Carter YF Series 120P-401 Carburetor Jet is an essential component in the fuel delivery system of a 4-barrel, Accelerator Pump carburetor, ensuring precise fuel metering and optimal engine performance. This high-quality jet is designed for use with specific fuel temperature and gravity flow rate conditions and is meticulously crafted from durable materials to ensure longevity. By following the proper installation procedures, you can easily replace a worn or damaged jet and restore the performance of your carbureted engine.

Buying Carter R-120P-401 0.101 carburetor jets for a 4-barrel Accelerator Pump (AFB) carburetor can have both advantages and disadvantages, depending on specific circumstances. Here are some potential pros and cons:

1. Improved Fuel Efficiency: By adjusting the jet size, you can potentially improve the fuel efficiency of your engine by ensuring the correct air-fuel mixture. A leaner mixture can lead to better fuel economy.

2. Better Idle Quality: Properly adjusted jets can help improve idle quality, making your engine run more smoothly and consistently.

3. Customization: Adjusting the jets allows you to fine-tune your carburetor to your specific engine and driving conditions.

4. Cost-Effective: Compared to other methods of carburetor tuning, purchasing and installing jets is relatively inexpensive.

5. Easy Installation: Jets are a simple component to install, making it an accessible option for DIYers.

1. Requires Knowledge: Properly adjusting the jets requires some knowledge and experience with carburetors. Improper adjustments can lead to poor performance or damage to the engine.

2. Potential for Over- or Under-Fueling: Incorrectly sized jets can lead to over- or under-fueling, which can negatively impact engine performance and fuel economy.

3. Time-Consuming: Fine-tuning the jets to achieve optimal performance can be a time-consuming process.

4. Limited Impact: While adjusting the jets can have a significant impact on engine performance, it may not be enough to address more serious issues with the carburetor.

The decision to purchase and install Carter R-120P-401 0.101 carburetor jets for a 4-barrel Accelerator Pump (AFB) carburetor depends on your specific circumstances and goals. If you have the necessary knowledge and experience, and are looking for a cost-effective and relatively simple way to improve engine performance, then this may be a good option. However, if you are not confident in your ability to properly adjust the jets or are dealing with more serious carburetor issues, it may be worth considering other options. Ultimately, the benefits of adjusting the jets can outweigh the drawbacks, but it is important to approach the process with caution and a solid understanding of carburetor tuning principles.

If you are confident in your ability to properly adjust the jets and are looking for a cost-effective way to improve engine performance, then purchasing and installing Carter R-120P-401 0.101 carburetor jets may be a good option for you. However, if you are unsure about your ability to adjust the jets or are dealing with more serious carburetor issues, it may be worth considering consulting a professional mechanic or carburetor tuning specialist. They can help you identify the root cause of any performance issues and provide you with a more comprehensive solution.

part # 120p401 prices

• $17.95-$93.00

specifications carbcaddie:

• brand: Carter
• part type: Jet Carburetor
• manufacturer part number: 120P-401

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• other
• credit card: Diners-club

returns carbcaddie:

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

general carbcaddie:

• Car Truck Parts Accessories > Air Fuel Delivery > Carburetor Parts
• condition: New other see details

seller carbcaddie:

• rating: 99.7%
• # reviews: 268494

shipping carbcaddie:

• type: Fixed
• carrier: USPS
• cost: $0.00
• transit: 5-8 Days
• service: USPS Ground Advantage
• class: Standard

offer carbcaddie:

• options: Ship-to-home
• availability: In Stock
• started: February 12, 2026
• quantity: 1
• sold: 0

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