Re: Testing a coil and CDI Box?

[David Stanton]

Like Frank said, that spark on some CDI motors (not sure about this one) is very short duration, and can be hard to see. I have had several CDI motors where I had to shut the garage door and turn out all lights anywhere near the motor to see the spark jump in a spark plug gap opened to 1/4 inch.

I have an Arctic like yours that a friend gave me. He was told it needs rings. I haven’t done anything with it yet, but I could see if it has spark and then take some ohm-meter readings and see how they compare to the ones you posted; but my schedule will not let me get to it for a couple of weeks.
Dave