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The Holley Mighty Mite 12-428 is an electric fuel pump designed for high-power carbureted engines. It offers reliable fuel delivery for Petrol, Diesel, Alcohol, and E-85 fuels, featuring solid-state technology for longevity. While easy to install and compatible with a range of fuels, users should note that optimal performance is achieved when the pump is mounted below the fuel tank outlet and within one meter of the tank.
| Model Part Number | 12-428 |
|---|---|
| Brand | Holley |
The Holley Mighty Mite 12-428 model provides 34 gallons per hour (gph) at 7 Psi, suitable for naturally aspirated engines up to 400 Bhp.
Yes, the Holley Mighty Mite pumps are compatible with E-85 fuel, as well as Petrol, Diesel, and Alcohol.
For optimal performance, the pump should be located below the fuel tank outlet and within 1 meter of the tank.
The included outlet union is designed to accept 8mm (5/16") bore push-on hose.
No, the Mighty Mite range is designed for high-power carburettor-fed engines. It is not designed for the higher pressures typically required by fuel injection systems.
The maximum current draw for all pumps in the Mighty Mite range is 2 amps.
The product description does not specify a wiring harness. Basic electrical connections will be required.
Check electrical connections for secure fit and correct polarity. Ensure the pump is mounted correctly (below tank outlet, within 1m). Verify the pre-filter is not clogged. Check for kinks or blockages in the fuel line.
Inspect fuel tank for debris that might be drawn into the pump. Ensure the fuel line is not collapsing under vacuum. Check for air leaks in the fuel system before the pump.
Confirm pump is correctly rated for the engine's requirements. Ensure the pre-filter is clean and not restricting flow. Verify mounting location meets recommended guidelines for optimal head pressure.
Ensure the pump is securely mounted to reduce vibration. Check if the fuel tank is sufficiently full, as pumps can be noisy when running low on fuel. Air in the fuel line can also cause noise.
Setup: Holley recommends mounting the Mighty Mite pump below the fuel tank outlet and within 1 meter of the tank. Ensure the included pre-filter is installed on the inlet side. The pump is designed for 12v negative earth systems. Connect the outlet union to an 8mm (5/16") push-on hose. The inlet and outlet ports are 1/8" NPT.
Compatibility: This pump is compatible with Petrol, Diesel, Alcohol, and E-85 fuels. It operates on 12v negative earth systems.
Care: Regularly inspect the pre-filter for debris and clean or replace as needed. Ensure electrical connections are clean and secure. Periodically check fuel lines for any signs of leaks or damage.
