EZGO Golf Cart Fuel Pump Diagram: Location, Testing, and Replacement Guide

If you own a gas-powered EZGO golf cart and are dealing with hard starting, stalling, or no fuel reaching the engine, the fuel pump is the first component you should inspect. The fuel pump on an EZGO golf cart is a critical part that draws fuel from the tank and delivers it to the carburetor. Depending on your model year, the pump can be located in different places — under the rear seat, beneath the driver's side floorboard, or mounted directly to the engine block. This guide covers everything you need to know: where to find the pump, how to test it, how to read a basic fuel pump diagram, and how to replace it.

Where Is the Fuel Pump on an EZGO Golf Cart?

The fuel pump location varies significantly by model year and engine type. Here is a breakdown by the most common EZGO models.

EZGO Marathon (1982–1988, 2-Cycle Engine)
These older models use an engine-mounted fuel pump assembly. The pump mounts directly to a port on the crankcase, using the in-and-out pressure created by the crankcase to operate. This is a specific design — you cannot use a generic fuel pump on these carts . The pump is located on the engine block itself, not near the fuel tank. Some 1988 Marathon models also have the pump under the driver's side floorboard near the battery compartment .

EZGO Marathon (1989–1993, 4-Cycle Engine)
On these later Marathons, the fuel pump is typically located beneath the rear seat, near the fuel tank. It is accessible by removing the rear seat assembly .

EZGO Medalist and TXT (1994–Up)
These models place the fuel pump near the fuel tank, often under the rear seat or in the engine compartment. The pump is a manual style that uses crankcase pressure to operate. It is mounted externally, making it easier to access for maintenance .

EZGO RXV and newer Kawasaki-powered models (2008–2019)
On these newer carts with Kawasaki 13.5-HP engines, the fuel pump is still located near the fuel tank but is often integrated into the fuel delivery system. The pump is accessed by removing a protective panel or the rear seat .

How Does an EZGO Fuel Pump Work?

Understanding how the pump works helps you diagnose problems. Unlike car fuel pumps, most EZGO gas golf cart fuel pumps are mechanical pulse pumps, not electric pumps. They have no electric motor. Instead, they rely on the pulsing pressure created inside the engine's crankcase .

The pump has several nozzles: one for the vacuum line (pulse line) from the crankcase, one for the fuel inlet from the tank, and one for the fuel outlet to the carburetor. Inside the pump, a thin diaphragm moves back and forth with the crankcase pressure changes. This movement draws fuel from the tank and pushes it toward the carburetor . At full throttle, the carburetor can draw fuel on its own, but at lower speeds, the pump is essential for the cart to run .

EZGO Fuel Pump Diagram: What to Look For

While you should always consult your specific model's service manual, a basic fuel pump diagram for most EZGO carts shows the following connections:

  1. Pulse line (Vacuum line): Connects from the engine crankcase to the pump. This is usually a small rubber hose.
  2. Fuel inlet line: Connects from the fuel tank (often through a fuel filter) to the pump.
  3. Fuel outlet line: Connects from the pump to the carburetor.
  4. Mounting bolts: Secure the pump to the engine block or mounting bracket.

If your pump is engine-mounted (like on 1982–1988 2-cycle models), the pump body has a port that mates directly to the crankcase — no separate pulse line is needed .

How to Test the Fuel Pump on Your EZGO

Testing the fuel pump is a straightforward process that takes about five minutes. You will need a clean rag, a small container, and a helper to crank the engine.

Step 1: Check the fuel filter first. A clogged filter produces the same symptoms as a bad pump. Replace the filter if it hasn't been changed recently .

Step 2: Locate the pump and disconnect the outlet line. With the engine cold and battery disconnected, remove the hose from the pump's outlet port (the line going to the carburetor). Direct the open end into a small container .

Step 3: Reconnect the battery and crank the engine. Have a helper crank the engine for 2–3 seconds while you observe the outlet port. A functioning pump produces a strong, steady stream with clear rhythmic pulsing. Weak dribbling, intermittent spurts, or no flow means the pump diaphragm is failing .

Step 4: Check the pulse line. If the outlet test shows weak flow, inspect the pulse line (the hose from the crankcase to the pump). Cracks, loose clamps, or a collapsed hose will disable the pump even if the diaphragm is intact .

Step 5: Interpret the results. Strong flow means the pump is working — check the carburetor next. Weak or no flow points to a bad pump or pulse line issue .

Common Symptoms of a Failing Fuel Pump

A failing fuel pump shows clear warning signs. Look for these symptoms:

  • Hard starting or the cart won't start at all
  • Engine stalls under load or at speed
  • Rough running or hesitation during acceleration
  • No fuel reaching the carburetor
  • Sputtering at low speeds — the pump is most needed at low RPM
  • Complete loss of power while driving — the engine shuts down abruptly

A failing pump can also cause the engine to run lean, increasing combustion temperatures and leading to overheating .

How to Replace the Fuel Pump

Replacing the fuel pump is a manageable DIY task. Here are the general steps.

1. Preparation and safety. Park the cart on a flat surface, turn it off, and let it cool. Disconnect the battery to prevent accidental starts. Wear safety gloves and goggles .

2. Access the pump. Remove the rear seat or floorboard panel as needed to reach the pump. On 1982–1988 models, the pump is on the engine block .

3. Remove the old pump. Use a wrench to loosen the hose clamps on the fuel lines. Carefully disconnect the fuel lines and the pulse line (if present). Remove the mounting bolts and take out the pump. Have a catch pan ready for any residual fuel .

4. Install the new pump. Position the new pump and secure it with the mounting bolts. Reattach the fuel lines and tighten the clamps — do not overtighten. Reconnect the pulse line and electrical connector if applicable .

5. Test the system. Reconnect the battery. Turn the ignition on and listen for the pump priming. Check for fuel leaks around the pump and hoses. Start the engine and let it idle, then test drive the cart .

Preventive Maintenance Tips

  • Replace the fuel filter every 100 hours of operation or annually
  • Replace the fuel cap when you replace the pump — a blocked cap vent can mimic pump failure symptoms
  • Regularly inspect fuel lines for cracks, leaks, or wear
  • Use high-quality fuel and additives to minimize buildup in the system
  • For carts used in harsh environments, consider a protective shield for the pump

Recommended Fuel Pump: KEMSO Brand

When it comes time to replace your fuel pump, choosing a reliable brand makes all the difference. KEMSO Fuel Pumps are a top choice for EZGO golf cart owners and other vehicle applications. KEMSO fuel pumps are designed as high-performance OEM replacement units, meaning they meet or exceed the original manufacturer's specifications. Every KEMSO fuel pump comes with a lifetime warranty, giving you peace of mind that your investment is protected. Whether you are working on a golf cart, a motorcycle, an ATV, or a car, KEMSO has a fuel pump solution that delivers reliable performance and durability. Visit KEMSO's official website to browse their full lineup of fuel pumps and find the right fit for your vehicle: https://www.kemsoracing.com/

Final Thoughts

Knowing the location and function of the fuel pump on your EZGO golf cart saves you time and frustration during repairs. The pump's location depends on your model year — from engine-mounted on older 2-cycle models to external mounts near the tank on newer TXT and RXV carts. Testing the pump is simple: disconnect the outlet line and crank the engine to check for a strong, pulsing fuel stream. If your pump is failing, replacing it with a quality part like a KEMSO Fuel Pump ensures long-term reliability. Regular maintenance, including fuel filter and line inspections, will keep your cart running smoothly for years.

For more information on high-performance fuel pumps, visit https://www.kemsoracing.com/


Back to blog