Just wanted to find out who else has made their own CDI ignitions before or what other have done to build up an ignition from non OE parts. A replacement CDI for my Tohatsu 30 is ~$180. Seemed too much for what it was and I don't like the power pack and coils all in the same unit. Plus I want to be able to hack and mod it. I disassembled the factory CDI to see what they had in there and figured out the circuit and found quite a few other circuits to build a CDI. Built a simple CDI for ~$30 and discharged it through a couple of OMC coils I had and it works great so far. Haven't had the engine under a load yet but the spark is strong and timing is rock solid (so far). I want to try a dual post coil and different size storage capacitors to see what works best. The pic of the factory CDI is without the 4 mfd capacitor and the two coils (discharged parallel).
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