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Power Pack repair attempt but cant discover parts
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Florek:
Hello i have problem with cdi from evinrude outboard it not give enough spark to ignite fuel. I disassembled cdi and check elements and dont know about 2 elements one is transistor with only q1027 th4 mark on side and two strange diodes? Seems like diode but i didnt see diode with purple stap and dont know what it is. Maybe someone can tell what type of diode it is? On diode its KIVC49
Florek:
No one know what it is?
orbanp:
Hi Florek,

I think you need to provide a bit more info!
Best would be for you to reverse engineer the circuit, as much as possible, showing the parts in question.
Also report on the context on how the power pack is used, if is it powered by battery, or if is it only "driven" by coils under the flywheel.
Possibly you can give the model number of the outboard then people would be able to look up some of this info.
Then I am sure people would be able to comment on the circuit, and on suitable replacement parts.
CDI ignitions are not unknown circuits...

Good luck, Peter
BurningTantalum:
HI Florek,
I think all of the CD2 packs are the same. I think there are about 11 diodes inside. I don't recall that any are zeners, but I haven't a component list.
I have plenty of photos if you need any. I have repaired several that have 'tracked over' at a particularly badly-designed point- not sure if this was your issue.
These units are generally reliable but owners are prone to connecting random wires to batteries etc when the motor will not start. The older rubber covered wires tend to rot off at the unit too.
There are 2 SCRs (thyristors) and one Triac.
Regards, BT
Florek:
I buyed engine with very weak spark cdi is driven from coil underwheel so its ac. Idk what more info i can provide. Engine is johnson but evinrude have the same cdi it have 2 cylinder two stroke year about 1994
@BurningTantalum what was bad in yours units?
https://postimg.cc/gallery/2qsprhrw8/
There is all pic that i have of my cdi
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