power pack bench test.

[jrs_diesel]

Re: power pack bench test.

That schematic for the 2 cylinder CDI would not work for our engines. That version in the schematic fires both plugs simultaneously (not a problem for a 2 cylinder 4 stroke) through one ignition coil. It still uses only one charge coild and one trigger coil, but remember, most Evinrude/Johnson 2 cylinder engines have 2 magnets in the fly wheel. One for each cylinder, each facing a different direction (north/south poles flipped around) to fire the correct cylinder, and mounted 180? from each other. I don't think that would work well with that version of CD ignition, only one magnet would fire a plug due to the polarity.

 

[Faztbullet]

Re: power pack bench test.

You could use that circuit on a single coil also, was just posted to show voltage peaks and how circuit is basically laid out and how it works. Even though it a 4 stoke it still still same circuit on a 2 stroke but for single cylinder...

 

[jrs_diesel]

Re: power pack bench test.

True. That would work for a single cylinder two stroke. The two cylinder engines would be the challenge.

I just recently replaced a power pack on my 9.9, set me back about $75. I am an electronics tech and could easily build one, or even fix my dead one (if I could get it open) for a lot less than $75. Heck, I would love to build one. My oldest is learning how to solder and this would be a fun project for us, I just have to find a schematic first.

 

[Faztbullet]

Re: power pack bench test.

Circuit is posted just drop a cylinder off the 3 cylinder schematic. Also since you like to build go to search and type in DVA adapter and build one as really needed to troubleshoot ignition components.....

 

[legalfee]

This is a typical CDI power pack.