The magneto creates the electrical charge needed to fire the spark plug, and the spark plug creates the spark inside the combustion chamber to ignite the gasoline (see How Two-stroke Engines Work for details). The job of the magneto is to create a surge of high voltage (between 10,000 and 20,000 volts) at just the right moment during each revolution of the crankshaft. The magneto is a self-contained generator of high voltage that provides ignition to an engine through spark plugs. The Magneto Ignition system does not require a battery. Magneto Ignition system is being extensively used in mopeds, scooters, wheelers, motorcycles, stationary engines, and aircraft reciprocating engines. A magnet—hence magneto —spins in close proximity to a coil of wire. Do not wire anything to the magneto. It is the major part of this type of ignition system because it is source of energy. The job of the ignition system is to supply a spark at the correct time within the cylinder. As the magnet spins (or the magnet rotor is turned), it generates a strong magnetic force that is “held back” by a primary coil. A word of warning, though: Keep your hand clear of the coil and coil output terminal. What is a CDI System? The white wire is the pickup/trigger/signal wire, it provides a tiny voltage with very little current and is not a magical 12V subsystem. As the magnet spins (or the magnet rotor is turned), it generates a strong magnetic force that is “held back” by a primary coil. If it’s working properly, the coil can put out nearly 30,000 volts, which you will obviously feel. To achieve this, the voltage must be increased considerably from the motorcycle’s electrical system (6 or 12 volts) to around 25,000 volts at the plug. No. The magneto relies on the physics principle of electrical inductance to produce electricity; when a wire is moved through a magnetic field an electrical current is induced in the wire. This battery is rechargeable and drives energy for its recharging from an alternator. An ignition magneto, or high tension magneto, is a magneto that provides current for the ignition system of a spark-ignition engine, such as a petrol engine.It produces pulses of high voltage for the spark plugs.The older term tension means voltage. A magnet—hence magneto—spins in close proximity to a coil of wire. Nothing. The common magneto ignition system has been around for over 100 years and is still used today on many stationary and portable engines where size restrictions limit the use of an external battery. It generates its own voltage for the primary. The spark must be sufficiently strong enough to jump a gap at the spark plug electrodes. This alternator is connected from the crankshaft of the engine and converts its mechanical energy into electrical energy. Next, ground the spark plug to the base of the magneto and test for a spark while rotating the drive lug. Battery Ignition System. Electrical power is generated by the magneto at the rear of the engine. A magneto is a small electric generator which is rotate by the engine and is capable of produce a very high voltage and does not need battery as a source of external energy. Magneto does not have enough power to do anything while being used for ignition. The job of the electrical system is to provide the spark which initiates combustion. A Capacitor Discharge Ignition is an electronic ignition device that stores an electrical charge and then discharges it through an ignition coil in order to produce a powerful spark from the spark plugs in a petrol engine. It is also used on many performance, aircraft and racing engines where a very reliable, super-hot spark … The main advantage of the magneto ignition system is it does not require any external source to produce a spark of energy. Here the ignition is provided by the capacitor charge. 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