Mercury 850 no spark

[SAT_Homeless]

Hello everyone. I have a Mercury 850 1975 and I have been working on it for weeks and cant get any power from the terminals on the switch box that go to the coils (green to ground). I have tested the stator and its good and is sending voltage to the switch box. I tested the trigger ( it has 4 wires) and I think it might be bad since i got 800 ohms across 1 of the wires instead of 2. Is there any way to bypass it to try to get spark? Im certian that everything is wired correctly and I replaced many of the bad wired and made repairs. I cant remove the flywheel to get the trigger off.

 

[Faztbullet]

Did you DVA test the voltage from stator? What was it if you remember?

 

[SAT_Homeless]

I apologize for not editing it but after some hard work i managed to get the flywheel off and as I suspected there was a bad trigger wire. The stator was producing about 50 volts on 1 wire and 200 is on the other. Is there any way to bypass the trigger to test for spark? The only other problem I could see is a bad switch box but I dont want to waste money on the trigger if the box is bad too.

 

[Chris1956]

A 1975 Merc 850 would have a distributor and battery CDI ignition. A 1976 Merc 850 would have ADI ignition, as you describe. A small point.

See if there is a test for your ignition components on the CDI Electronics web site.