Hi back to my 60 hp mariner I have the complete workshop manual for this beast but even that cant help me. Today I changed the trigger , the CDI unit, the condenser new 12mm positive and negative wire and new lugs and had 3 batteries in line but still no fire ? I saw a healthy spark this arvo but then nothing so it looks like it might be an on and off again or something not connected cleanly I also ran 12mm earth leads from the starter to the motor to make sure of a earth but still no. Tomorrow my last hope Im going to disconnect the harness to the key and wire directly to a spare ingintion switch just maybe it might be the stop switch or something like that. When I find the problem i will let you all know just in case you ever come over the issue.