I'll chime in.
I have been messing around with different hydrogen generators this last year. Had great results from some while others didn't work. Now I found a good viable design.
As for distilled water...NO is doesn't conduct electricity but add some Potassium hydroxide(KOH) and you will see a world of difference.
WARNING! KOH is dangerous to handle take precaution!
I built a mini generator that I wish to install on my Cub.
Here is a pic.
I haven't had a chance to install it yet because I am working on bigger designs but am curious how the Kohler will run with a good boost.
Chase