On the Eastern sections of the Historic Columbia River Highway between Hood River and The Dalles the hillsides are now green in their sublime spring beauty. Wildflowers and wild grasses abound. Get out there in early spring, because the eastern Columbia River Gorge landscape is usually brown by the middle of May.
Magneto Motive Force is expressed as a current, I flowing through a coil of N turns. The magnetic field strength of an electromagnet is therefore determined by the ampere turns of the coil with the more turns of wire in the coil the greater will be the strength of the magnetic field.
I think you have two items mixed here. The magneto magnets hold a magnetic charge. The Magneto coil ring can go bad. The ignition coils do not hold a charge and are the items checked with a HCCT or other form of coil tester. The magnets can be recharged in car.