Re: Mercury 50hp 4 cyli 1984 plugs 1 and 2 not firing. stator blue-blue/white open c
No diodes in the stator. Rectifier hangs off block. My experience is two yellow wires from stator go to rectifier.
Could be switch box, since some cylinders work.
You need cdielectronics.com. They have a great ignition troubleshooting guide.
Good luck,
J