What Is a Priming Bulb

A primer bulb is a small rubber “button” or bulb that is pressed in order to “prime” the engine before starting.

Is primer bulb necessary?

A primer bulb is important because it is helps to fill the carburetor with the correct amount of fuel. It does this by pulling fuel through the fuel line. You may need to fix or replace your primer bulb if: It is not creating proper suction.

What does priming an engine do?

What It Does. A primer will pump a small amount of gas into the carburetor. Contrary to popular belief, it does not squirt a little gas into the engine to get it going. … A primer sends gas into the carburetor so it can create a fuel and air mixture that is ready to go right into the cylinder and keep the engine running.