An Inverter with ac output could operate primary of a regular type Ignition transformer , so as then,a voltage multiplier could be used. The current mower engines have a built in epoxied solid state trigger for the final MAGNETRON , 3 terminal autotransformer, so as it is a one piece unit. The original type was called a MAGNETO as just a transformer that worked with points contacts and condenser capacitor. Then came the same MAGNETO that could be used with an accessory trigger module , either Briggs brand or the universal type trigger module which was better, as engine would start at less cranking speed.
Another idea of mine was to ADD stronger magnets to the curved ALNICO magnet embedded in rim of flywheel. Magnets are not made as exact curve of flywheel. Therefore the only way is to use thin type , vertical, NEODYMIUM magnets super glued onto the existing one so as north pole faces outward that is .012" from MAGNETRON core laminations. This is called armature gap. The thin sideways measure has less of a curve for each one! I succesfully tested this theory on hand made spinning wood flywheel that fires a magnetron/magneto with trigger. Resulting high volts actual readings were not measured. I was also able to switch to a Positive high volts , rather than regular negative high volts with positive ground. (Upside down ignition coil) Ok If magneto with separate trigger, but not Briggs brand complete Magnetron. (The MAGNETRON coil using the universal type trigger will operate both polarities- but not the older style Briggs brand. ) See different photos of both types. On very old lawnmowers, the smaller flywheel had 2 magnets of both north and south poles firing the ignition coil with AC, with breaker points and condensor.
Some older cars had what was called HEI high energy ignition coils with outputs of 23-60,000volts. The mower ignition firing is only 10kv under compression , 6kv in air, and needs to be greatly increased in voltage for use with alternate energy projects that need a pre-type PLASMA PATH across spark plug, as the much higher voltage HEI units already do. How do you think this should be done. I am not an engineer.
