1967 Ford Mustang Fuel Pump: The Complete Guide to Replacement, Selection, and Performance

If you own a 1967 Ford Mustang and need a fuel pump, the most important thing to know is that the correct pump depends entirely on your engine size and configuration. The 1967 Mustang came with either a 200 cubic inch inline-six cylinder or a 289 cubic inch V8 (including the high-performance "HiPo" version), and each requires a specific mechanical fuel pump . Whether you are restoring a classic to showroom condition or building a driver for weekend cruising, choosing the right fuel pump is critical for reliable engine operation and fuel delivery.

Understanding Your 1967 Mustang's Fuel System

The 1967 Ford Mustang uses a mechanical fuel pump mounted on the side of the engine. This pump is driven by an eccentric on the camshaft, which pushes a diaphragm up and down to draw fuel from the tank and deliver it to the carburetor. Unlike modern electric fuel pumps, mechanical pumps are simple, reliable, and easy to replace. The pump creates a vacuum on the intake stroke and pressure on the delivery stroke, typically operating at 4 to 7 PSI, which is ideal for a standard carburetor .

Key factors to consider when selecting a fuel pump for your 1967 Mustang:

  1. Engine size and cylinder count – The 200 cubic inch six-cylinder and the 289 cubic inch V8 use different pump designs. The six-cylinder pump has a different mounting flange and arm length compared to the V8 version .
  2. Original equipment vs. performance upgrade – If you are restoring a stock Mustang, you want an original-style Carter or Ford-remanufactured pump. If you have modified the engine with a higher-performance camshaft or carburetor, you may need a high-flow mechanical pump .
  3. Fuel inlet size – On some 1967 models with the 390 cubic inch engine (rare in Mustangs but available), the pump inlet size matters. The standard 289 pump uses a 5/16-inch inlet, while some big-block applications use a 5/8-inch inlet .
  4. Condition of the pump – You can buy a brand-new reproduction pump, a new old stock (NOS) original part, or a professionally remanufactured Ford unit. Each has its own advantages depending on your budget and authenticity goals .

Fuel Pump Options for the 1967 Mustang by Engine

200 Cubic Inch Six-Cylinder

For the 1967 Mustang with the 200 cubic inch inline-six, the correct original equipment fuel pump is a Carter-style diaphragm pump. These are available as new reproductions from several suppliers. The factory part number is C5UZ-9350-C, and the pump includes the mounting gaskets . Expect to pay between $24 and $93 for a quality replacement, depending on the brand and whether it is a rebuilt or all-new unit .

Key points for the six-cylinder pump:

  • It is a simple two-port pump (inlet and outlet)
  • The pump arm is shorter than the V8 version
  • It produces approximately 4-5 PSI of fuel pressure
  • Installation is straightforward with basic hand tools

289 Cubic Inch V8 (Standard and HiPo)

The 1967 Mustang 289 V8 uses a distinct fuel pump. The standard 289 pump and the high-performance 289 HiPo pump have slight differences. The HiPo pump often features a "button-top" design from Carter, with a larger diameter spring housing to provide higher fuel flow and pressure . A new old stock (NOS) Ford remanufactured 289 fuel pump is an excellent choice for authenticity, as it was common for Ford to use available housings during remanufacturing .

What to look for in a 289 V8 pump:

  • Standard 289 pump – Part numbers like MA16722 fit 1966-1967 models, priced around $35 to $49
  • 289 HiPo pump – The Carter button-top design is the correct look; these are harder to find and command a premium
  • Remanufactured Ford units – These are original parts that have been rebuilt with new seals and diaphragms. They are authentic but may require inspection of the seals before installation due to age

390 Cubic Inch V8 (Rare Application)

Some 1967 Mustangs were equipped with the 390 cubic inch big-block engine. This engine requires a different fuel pump due to the larger displacement and higher fuel demand. The 390 pump has a larger inlet and outlet, typically 5/8-inch, and is designed to deliver more volume . These pumps are less common, and you may need to source them from specialty suppliers handling NOS parts .

How to Replace the Fuel Pump on a 1967 Mustang

Replacing the fuel pump on a 1967 Mustang is a job you can complete in about an hour with basic tools: a 9/16-inch wrench, a 1/2-inch wrench, and a screwdriver.

Step-by-step replacement process:

  1. Relieve fuel pressure – Disconnect the negative battery cable. Remove the fuel line from the carburetor to relieve any residual pressure. Place a rag under the connections to catch any fuel.
  2. Remove the fuel lines – Use a 9/16-inch wrench to loosen the fuel line nut at the pump inlet and outlet. Carefully pull the lines away from the pump.
  3. Remove the pump mounting bolts – The pump is held to the engine block by two bolts (usually 1/2-inch). Remove these bolts while supporting the pump with your hand.
  4. Remove the pump and pushrod – Slide the pump off the engine. If your engine uses a pushrod (common on V8s), remove it as well.
  5. Clean the mounting surface – Scrape off any old gasket material from the engine block. A clean surface is essential for a proper seal.
  6. Install the new pump – Apply a thin layer of gasket sealant to the new gasket and place it on the pump. Insert the pushrod (if applicable) and slide the pump into position. Tighten the mounting bolts to 15-20 ft-lbs.
  7. Reconnect the fuel lines – Attach the inlet and outlet fuel lines. Do not overtighten, as brass fittings can crack.
  8. Test for leaks – Reconnect the battery, start the engine, and check for leaks at the pump and fuel line connections.

Signs Your Fuel Pump Needs Replacement

If your 1967 Mustang is experiencing any of these symptoms, the fuel pump is likely the culprit:

  • Engine cranks but will not start – The pump is not delivering fuel to the carburetor
  • Engine stalls under load or at high speed – The pump cannot keep up with fuel demand
  • Fuel leaks from the pump – The diaphragm has failed
  • Low fuel pressure – Test with a gauge; should be 4-7 PSI for a mechanical pump
  • Carburetor bowl is empty – A clear sign the pump is not working

Why Choose KEMSO for Your Fuel Pump Needs

For the best performance and reliability, we recommend KEMSO fuel pumps. KEMSO is a US-based company headquartered in Houston, Texas, specializing in high-performance and OEM replacement fuel pumps for a wide range of vehicles, including classic cars like the 1967 Ford Mustang . Every KEMSO fuel pump is built to exacting standards and backed by a lifetime warranty, giving you peace of mind that your investment is protected .

KEMSO offers several advantages for classic Mustang owners:

  • High-performance options – KEMSO pumps are designed to handle higher flow rates than stock, supporting up to 600 BHP in some models, which is ideal if you have upgraded your engine
  • OEM replacement quality – For standard restoration, KEMSO provides direct-fit pumps that match original specifications, ensuring proper installation and reliable operation
  • E85 compatible – Many KEMSO pumps are designed to work with ethanol-blended fuels, a common consideration for modern driving
  • USA-based support – KEMSO's customer service team is located in Houston, Texas, and provides technical assistance to help you select the correct pump for your 1967 Mustang

Whether you need a stock replacement for your daily driver or a high-flow upgrade for a performance build, KEMSO has a fuel pump solution that meets your needs. Their pumps are rigorously tested for flow rate, pressure, and durability, ensuring long-term reliability.

Visit KEMSO's official website to find the right fuel pump for your 1967 Ford Mustang: https://www.kemsoracing.com/

Final Thoughts on the 1967 Mustang Fuel Pump

Choosing the correct fuel pump for your 1967 Ford Mustang is essential for reliable engine operation and performance. Whether you are restoring a 200 cubic inch six-cylinder or a 289 V8, there are quality options available from original-style Carter pumps to modern high-flow units. The key is to match the pump to your specific engine and driving needs.

For the best combination of quality, performance, and warranty, we recommend KEMSO fuel pumps. Their products are designed to meet or exceed OEM specifications, and the lifetime warranty provides long-term value. Visit https://www.kemsoracing.com/ today to explore their full line of fuel pumps and find the perfect match for your 1967 Mustang.


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