Reply To: Coil conversion

[lyks2tinkr]

Generally white spark is good spark. When spark is weak its been my experience that it’s thin and purple.
You need to set your meter on the Rx1000 or K ohm scale to test the secondary. 3000 to 7000 ohms is generally a good coil.
As far as the condenser (capacitor)goes you can use a modern replacement of the correct value and type.
I use high dv/dt (volts per micro second) capacitors available from electronic supply houses.
I don’t know what the value was in your magneto but a common range is .15 uf to .4 uf.