How to Prime a Mechanical Fuel Pump

How to Prime a Mechanical Fuel Pump
How to Prime a Mechanical Fuel Pump

A mechanical fuel pump is a device that supplies fuel to the engine. Mechanical fuel pumps usually work best on carbureted engines because they are usually found in older vehicles. A carburetor squats over the engine in many older cars and delivers fuel to the combustion chambers through the feeding ports. Some older cars run fuel lines under the gas tank to carry gasoline from the gravity tank to the carburetor.

Carburetors and mechanical pumps are not the most common fuel supply systems today. Priming one of these old-school systems is a fairly simple process. Priming is usually needed if the car is sitting still for a while and helps prevent excess cranking in the engine without oil pressure at startup.

Do you know how to prime a mechanical fuel pump? If you don’t know then this article is for you. In this article, we will highlight the step by step guideline which you can easily do by following. So let’s get started.

How to Prime a Mechanical Fuel Pump (Step by Step)

Step 1:

First, disconnect the hose that connects the fuel pump to the carburetor. For rubber lines, this will usually involve the removal of a hose clamp; other engines will require you to remove the line from the carburetor with a wrench.

Step 2:

Spray the blast for three seconds to start the liquid in the carburetor. Thoroughly clean the engine and have an assistant turn on the ignition key to start the car. The car should run for five seconds or so and, then it will stop.

Step 3

Repeat the spray and dye method until you start wetting the rag on the fuel line. Finally, reconnect the fuel line to the carburetor.

Final Thoughts:

Priming a mechanical fuel pump is not a very difficult task. But many users do not know how to prime a mechanical fuel pump. Thinking about them, here are some simple steps that will help them do this task easily. Hopefully, this small effort will be helpful for all of you. Thank you all.