Reply To: Coil conversion

[opposedtwin]

lyks2tinkr wrote:

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.

I will get a picture of my meter setting tonight.

I believe it is set as you recmmend. I’ve tested many omc and scintilla coils at this setting. As I said above, the primary winding tests good, burys the needle. The secondary only bumps the needle anlittle bit so I would say it measures less than 500 ohms.

So if the secondary winding is toast, how am I getting any spark at all?

I will get the condenser tested.