watkykjy i do belive i know why u dont hawe the second spark on ur engine if its a new one, simply bc it has a electronic ignition
i found out the same from a 2500W generator i tested on, just remove the carburator entirely, stick a smal SS line in there, retard ur ignition and voila u hawe a HHO engine

if ur great with ignition u can realy get lots from the HHO gas, and if u hawe a old engine with two sparks its easy to swap the ignition to a electronic one, mountains of dealers like MSD, Gready and so on
i hawe a question too, do u use clean water or electrolyte watkykjy?
i use only clean destilled water in my latest cells and there is no foaming in my cells after a few runs, the corotion on the plates is minimal too
in May il hawe the entire month just for this research and im now hamstering equipment i might need

take a look on PEM cells and think of a union of our work to this
Mr Browngass