Re: 1994 johnson 175 2,4,& 6 dead
Just went thru a problem with optical ignition. It was intermittent no spark on all six. Turned out to be corrosion on the connector that plugs into the optical sensor up under the plastic cover. trigger signals were not getting to the pack.
EDIT:
IF YOU HAVE A SHIFT SWITCH>>>>
I read somewhere that the shift switch on some models kills the port bank. On all V6s that I have ever worked on, the shift switch kills stbd bank, so this is different if true.
I think I read it on CDIs debug pages.
If so, simply disconnect the black/yellow wire from the shift switch to test.
EDIT 2:
I re-read and saw your shift switch reference. One thing...the shift switch black/yellow wire does not go to the big red plug. It goes to the pack directly, in one of those plugs that big flop mentioned.