The Purpose of a Primer Bulb
A primer bulb is a component commonly found on small engines. It is a small, hollow-rubber bulb that fills with fuel. Pressing the bulb multiple times is usually a requirement before starting the engine. Does this Spark an idea?
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Purpose
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A primer bulb sends gas to a small engine's carburetor when pushed. This enriches the fuel and air mixture with more fuel during engine start.
Significance
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A large internal-combustion engine sends fuel to its carburetor or fuel injector with a fuel pump. Small engines don't have a fuel pump. Fuel for starting the engine must be delivered manually by pushing the primer bulb.
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Location
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The primer bulb will be directly attached -- or very near -- the engine's carburetor. Pressing it with your finger produces the pressure to send fuel to the carburetor.
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