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Jim, This is a low-tension system and you won't see enough spark to "snap" to ground from the mag wire, like the spark from a typical tractor magneto does.. IIRC, the mag puts out something like 10 to 50 VAC to ground, open circuit. Here's how the system works... the mag and ignitor MUST be timed exactly to each other, AND the engine. As the magnets pass the coil in the mag, current is generated, and passes to ground through the ignitor points. The ignitor needs to be tripped, so the points snap OPEN at the instant the change in the magnetic field in the mag's coil (and therefor, the CURRENT) is the greatest. When the igntor points snap "OPEN", the magnetic field in the mag's coil suddenly collapses, creating a voltage spike that jumps the ignitor points, creating the spark needed to "fire" the engine. You can check the OPEN CIRCUIT voltage from the mag while cranking the engine, with an analog meter, and see what it's putting out. Make SURE the ignitor and mag are timed correctly, and the ignitor points are making contact.
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