Then the electricity travels to the distributor, which distributes the current to the cylinders. Each cylinder has at least one spark plug and also has a piston. The electricity forms a spark at the spark plug that ignites the gas and air mixture within each cylinder. In a synthesis of my research findings, I discovered that automobile spark plugs do not all have a set voltage. In the sources that I used, I found that the voltage needed ranges from 15,000 to 35,000 volts.
Some spark plugs require a higher or lower voltage than others.
Standardized Result Roth, Alfred C. Small Gas Engines . The Ignition System . The primary purpose of the ignition system, of a small gasoline engine is to provide sufficient electrical voltage to discharge a spark between the electrodes of the spark plugs. Secondly, the spark must occur at exactly the right time to ignite the highly compressed air-fuel mixture in the combustion chamber of the engine. The ignition system must be capable of producing as much as 40,000 volts to force the electrical current across the spark plug gap.