magneto coil is replacement supply voltage for lights and others when bike runs, it also acts as a charger for battery.
An ignition coil requires external electrical power. A magneto requires only mechanical power to create an ignition spark. If an engine HAS no electrical power (lawnmower, tiller, chain saw) then a coil would not function.
To wire a basic magneto coil, connect one end of the coil to the spark plug and the other end to the magneto points or module. Ensure you have a good ground connection for the coil as well. Make sure to follow the manufacturer's instructions for your specific magneto coil for proper wiring.
A magneto is an electrical power generating device which operates without the need for a battery to energize the coils. A magneto uses permanent magnets to induce an electrical current, which is "pulsed" Direct Current [DC]. These pulses are controlled [by "points" in the "old" days] to "time" the pulses to the coil primary winding coil, which the creates the high voltage ignition pulse which is delivered to the spark plug[s].
You probably need a new coil/magneto. Follow the plug wire to it. If it's a magneto you can try a little sand paper to clean off the flywheel magnet and the magneto points of contact. They aren't touching the magneto so you can get some paper in there. If it's a coil, you will need a new one.
Full-form Of MMF: MAGNETO MOTIVE FORCEDefinition Of MMF ( Magneto motive Force ): Just as electromotive force ( emf ) is necessary to pass current in electric circuit, magneto motive force ( mmf ) is necessary to establish flux in the magnetic circuit. Magneto motive force is the multiplication of current flowing through the coil and the number of turns of the coil.Unit of magneto motive force ( mmf ) is ampere turn.Thus, it should be understood that the magneto motive force can be increased by increasing the number of turns in the coil or by increasing the current flowing through the coil or by increasing both.CommentThe unit of measurement of magnetomotive force is actually the ampere, although it is frequently spoken as 'ampere turn' to prevent its confusion with electric current.
If the P-lead is grounded, the magneto doesn't generate spark. Basically it turns the engine on and off.
around the megnet genrated field its call magneto motive force
If the P-lead is grounded, the magneto doesn't generate spark. Basically it turns the engine on and off.
does it have spark to the plug if not the part you might check would be the coil or the electronic start module probably the latter if it is a newer mower or of ots older then the coil magneto usually dont go bad could be a bad gap between the coil and the magneto if its an older mower could be a bad set of points if its an older mower point gap could be bad spark plug could be bad as I don't know exactly what the lawn mower is doing hard to tell what is wrong
For most small 4 cycle cylinder engines using a magneto and a coil to provide electricity to feed the spark the gap is .006 to .010.
To find the flux of a coil, you need to integrate the function over the area of the coil. This involves calculating the total amount of the function passing through the coil's surface.
The magneto air gap is a precision measurement that's taken between the edge of the flywheel and the ignition coil armature. The flywheel and the crankshaft are held together in alignment by the flywheel key.