I have a 1989 3 cyl. 80 h.p. mercury outboard. I am not getting spark in any of my cylnders. I have three individual ignition coils I would figure that all three would not go at once. I was in the process of troubleshooting and I relized that my rectifier does not have countinuity where it is supposed to. But the rectifier to my knowledge is for the chargeing system and has nothing to do with spark. The last step that I took in trouble shooting was I disconnected the remote control harness coming from the control to the motor and I jumped the constant juice from the starting solenoid to the cranking motor and did the standard spark plug gap test still no spark. By doing this I have decided that the problem is definetly in the motor not coming from the controls. I am now considering the switch box being faulty. Does anyone no the proper way to diagnos this switch box? Or does anyone have another suggestion for me?