I am just chiming in with a question on these ignition conversion modules. I purchased one recently for a Kirby-Lauson VK-30. I have not been able to get it to work. Every now and then the engine fires, but it appears to be mis-firing. I have double-checked the timing and the armature is where it should be.
The thing that has me puzzled is how do you know if an engine is positive or negative ground?
I assumed these engines would be negative ground, as the earth wire from the coil is covered in blue plastic. However to confuse things, the wire to the stop switch is white with a red terminal, which could suggest positive earth.
So can anybody please tell me if these Kirby-Lauson engines were positive or negative earth?
I have good spark on test, but could the timing be reversed if I've got the positive or negative the wrong way around? I am tempted to try it the other way, but thought I should ask first in case I damage the module.
EDIT: I have moved my question to the Tecumseh engine section on this forum.
https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/90585.html#Post90585
