My father and I tested the renix it a few days ago,referring to Mac's thread on Renix units on this forum. We found the following: not having any spark from plugs/ very occasional weak spark ,noticing a pulse/wave reading from the flywheel sensor when using and oscilloscope when cranking (power getting to unit) and finding that weirdly enough the test light stayed on even when ignition key was out after cranking but when cranking the ignition, the test light did not come on or flicker.
With this knowledge and some of the symptoms before she completely failed to start last year; this seems like the next logical step. If anyone has a (working) Renix 411 unit for sale or can recommend a place/site then I would be most greatful.
Regards from Ed