Golf Car Catalog offers fuel pumps and fuel pump repair kits for many EZGO, Club Car, Yamaha, Columbia Par Car, and Yamaha golf carts, utility vehicles, and personnel carriers. As the name implies, the fuel on your golf cart is responsible for moving or "pumping" the fuel from your fuel tank to the carburetor where is mixed with air and injected into the engine for combustion.
Most golf cart fuel pumps are diaphragm based and work off vacuum pressure. This vacuum is generally supplied from the crankcase pressure. Crankcase pressure is very different than compression. Crankcase pressure is the pressure BELOW the piston, while compression is the pressure ABOVE it. As the piston moves up and down, it changes the pressure i the crankcase causing it to pulse. This pulsing action is transferred through a vacuum hose to the golf cart fuel pump which causes the diaphragm to pulse also. The fuel pump has an inlet for incoming fuel and an outlet for outgoing fuel. The pulsing action of the fuel pump diaphragm causes the fuel to pump from the fuel tank to the carburetor.
If you are not geti8ng enough fuel to the your golf cart's engine, be sure to check your crankcase for any leaks which could lead to a decrease in crankcase pressure, the vacuum line to the fuel pump for air leaks, or possible the pump itself. Often the diaphragms go bad and can be replaced with one of Golf Car catalog's fuel pump rebuild kits. However, they are often beyond repair and the entire fuel pump needs to be replaced.