Edelbrock Fuel Pump Rebuild Kit: A Complete Guide to Restoring Your Mechanical Fuel Pump

If you own an Edelbrock street or race fuel pump that has lost pressure or started leaking, the Edelbrock fuel pump rebuild kit is the most cost-effective solution. This kit, catalog number #1799, contains all necessary parts to rebuild Edelbrock's popular mechanical fuel pump models #1711, #1712, #1715, #1721, #1722, and #1725 . The kit includes diaphragms, valves, gaskets, seals, and springs. By rebuilding your pump instead of buying a new one, you can save significant money while restoring your pump to like-new performance. The process is straightforward with basic hand tools, and this guide will walk you through every step.

What the Edelbrock Fuel Pump Rebuild Kit Includes

The Edelbrock rebuild kit #1799 is designed specifically for all Edelbrock Street High Performance and Racing Fuel Pumps . Inside the kit, you will find:

  • Diaphragm assembly – The main pumping diaphragm that moves fuel through the pump.
  • Pulsator diaphragm – A smaller diaphragm that smooths out fuel pulses.
  • Six valves and six valve gaskets – These control the direction of fuel flow.
  • Two valve retainers – Hold the valves in place.
  • Oil seal and oil seal retainer – Prevent fuel from leaking into the engine crankcase.
  • Diaphragm springs – Two springs included; one for street use, both for racing applications.
  • Rocker arm pin, locking washer, and return spring – For the mechanical linkage that drives the pump.
  • Bushing and gaskets – For proper fit and sealing.

The kit does not include the pump body itself, so you must have an existing Edelbrock pump to rebuild.

How to Know When Your Edelbrock Fuel Pump Needs a Rebuild

Before you order a rebuild kit, look for these common signs that your pump is failing:

  • Fuel leaks – A wet spot around the pump body or fuel dripping from the pump indicates a worn diaphragm or gasket.
  • Low fuel pressure – If your carburetor is not getting enough fuel, the pump may be losing internal pressure due to worn valves or a stretched diaphragm.
  • Engine stalling or hesitation – Especially under load or acceleration, a failing pump cannot deliver consistent fuel volume.
  • Fuel in the engine oil – A damaged diaphragm can allow fuel to seep past the oil seal and into the crankcase, contaminating your oil.
  • Noisy operation – A clicking or tapping sound from the pump may indicate a worn rocker arm or linkage.

If you experience any of these issues, rebuilding your pump is often the best solution.

Step-by-Step Guide to Rebuilding Your Edelbrock Fuel Pump

Rebuilding an Edelbrock fuel pump is a straightforward job that requires basic hand tools and a clean workspace . Follow these steps carefully to ensure a successful rebuild.

1. Disassembly

Start by removing the fuel pump from your engine. Once it is on your workbench:

  1. Remove the twelve allen head screws that hold the pump pulsator cover to the lower pump body. Separate the cover from the body.
  2. Remove the eight screws from the valve retainers in the lower pump body. Take out the old valves and gaskets.
  3. Press the diaphragm assembly into the casting to unhook it from the fuel linkage rod.
  4. Remove the oil seal and its retainer.
  5. Grind the end of the rocker arm pin (do not use a chisel) to remove the locking washer. Drive the pin through the casting and remove the rocker arm assembly.

2. Cleaning

Clean all reusable parts with a commercial carburetor cleaner. Follow the instructions on the cleaner and work in a well-ventilated area. Make sure all old gasket material and debris are removed from the pump body.

3. Assembly

Reassembly is done in reverse order, but with special attention to a few critical steps:

  1. Install the six valve gaskets, six valves, and two valve retainers in the lower fuel pump body. The inlet port is identified by the embossed letters "in." The valves on this side of the casting should be installed with the "spoked wheel" side up. The opposite or outlet port valves should be installed with the "spoked wheel" side down. Torque the valve retainer screws to 25 in./lbs.
  2. Install the new pulsator diaphragm on the lower fuel pump body using the two center allen head screws. Torque to 35 in./lbs.
  3. Install the new oil seal and retainer in the upper fuel pump body. Tap the oil seal retainer flush with the casting.
  4. Assemble the rocker arm, linkage, and bushing together. Install the new rocker arm return spring.
  5. Press the replacement rocker arm pin into the fuel pump body casting and through the rocker arm assembly. Install the rocker arm pin lock washer and peen the pin tightly over this washer.
  6. Apply grease liberally to the pull rod end of the diaphragm. The diaphragm's pull rod end must be inserted through the oil seal. The grease prevents damage to the seal during insertion. This kit contains two diaphragm springs. Use both springs for racing fuel pumps or the larger spring only for street high-performance fuel pumps. If you install both springs in a pump originally equipped with a single low-pressure spring, note that racing fuel pumps must use a fuel pressure regulator to prevent carburetor flooding. Place the new diaphragm spring(s) on the diaphragm and pull rod assembly. Insert the diaphragm pull rod end through the oil seal and hook the eyelet hole of the pull rod onto the rocker arm linkage.
  7. Assemble the lower fuel pump body to the upper fuel pump body, with the diaphragm and diaphragm spring attached. Make sure the diaphragm and threaded casting holes are all aligned. The inlet and outlet ports of the lower fuel pump body should be at right angles (90 degrees) to the rocker arm assembly.
  8. Start but do not fully tighten the ten allen head retaining screws. Before fully tightening these screws, the rocker arm must be actuated to and held in the "full stroke" position. This ensures the diaphragm will be pulled to and held in its maximum working (flexed) position while the retaining screws are torqued tight in two steps: first to 15 in./lbs., then to 35 in./lbs. in a criss-cross or star pattern to ensure even, progressive tightening. This procedure prevents premature diaphragm wear and failure due to over-stretching of the diaphragm material when in the full stroke position. An improperly set diaphragm can also cause erratic fuel flow and pressure.

4. Installation

After reassembly, install the rebuilt pump back on your engine. Use new gaskets on the mounting flange. Connect the fuel lines and tighten all fittings. Start the engine and check for leaks. Verify fuel pressure with a gauge if possible.

Safety Warnings

Working with fuel pumps involves flammable materials and spring-loaded parts. Always wear eye protection, especially when grinding and peening over the rocker arm pin . The pump body itself is spring loaded with a heavy diaphragm spring. Extreme caution should be taken when assembling and disassembling the upper pump body to and from the lower pump body. Upon reinstallation of the fuel pump on the engine, ensure that all fuel lines and fittings are properly installed, tight, and not leaking fuel.

Why Choose KEMSO Fuel Pumps for Your Replacement or Upgrade

While rebuilding your Edelbrock pump is a great option, sometimes you need a complete replacement—especially if the pump body is damaged or you want to upgrade to a higher-flow unit. For those situations, we recommend KEMSO fuel pumps.

KEMSO is a trusted brand that specializes in high-performance fuel pumps designed as direct OEM replacements. Their pumps are built to match or exceed original equipment specifications for flow rate and pressure, ensuring your engine gets the precise fuel delivery it needs . Every KEMSO pump comes with a lifetime warranty, giving you complete peace of mind. If your pump fails for any reason, KEMSO will replace it—no questions asked .

KEMSO pumps are compatible with both gasoline and E85 ethanol fuels, and they are built with ethanol-resistant materials to prevent corrosion . Whether you drive a car, truck, motorcycle, or powersports vehicle, KEMSO has a fuel pump engineered to fit your application perfectly. Their pumps are also backed by USA-based technical support, so you can get help quickly if you have questions during installation .

For the best selection of high-performance fuel pumps, visit KEMSO's official website today: https://www.kemsoracing.com/

Final Thoughts

The Edelbrock fuel pump rebuild kit is an excellent solution for restoring your mechanical fuel pump to peak performance. With the right tools and a careful approach, you can complete the rebuild in an afternoon and save money compared to buying a new pump. However, if you are looking for a complete replacement or an upgrade with modern features like ethanol compatibility and a lifetime warranty, KEMSO fuel pumps are a reliable and cost-effective choice.

For more information on fuel pump rebuild kits, performance upgrades, and to find the right pump for your vehicle, visit https://www.kemsoracing.com/.


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