FinnHammer
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Axman,
First of all, cudos for finding and actually reading that Scribd manual, nice find. The ignitor module is not a CDI. (Capacitor Discharge Ignition) If it was it would have an output charge which could be dumped into a suitable ignition coil. A CDI actually consumes power because it supplies power to the coil at high voltage. It has a high voltage generator built in.
Instead, it is a TAI (Transistor Amplifier/Assisted Ignition) This system acts like any oldfasioned breaker points system, except that the breakers are substituted by a transistor, which acts like the switch. Therefore this system has a very low power draw, probably in the milliampere region. There iis a block diagram in the haynes manual, I will post it in the next answer to this thread, it shows how the transistor functions as an open emitter. Interesting to me is the lack of a snubber capacitor. It is present in the points breaker ignitions, usually for the reason of reducing sparke on the breaker points, but it has the added effect that when the points open, the ignition coil is connected to ground via the caapacitor. therefore cap and coil form an RC ressonant circuit which has a ressonant frequency, by which the voltage rings down, producing an oscillatory spark of relatively long duration. The ignitor lacks this snubber (at least as far as I can see) .
My problem is that I am messing with alluminum welding of the tank, and heavily loaded on that learning curve, so have little time to investigate this matter also.
Lots to learn about ignition systems, but we all deserve an igniter with at least a configurable advance curve, and hopefully also tied to the position of the carburettor. Fun stuff!
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