1984 90hp v6 plug three not firing

[gardneca195]

I cannot for the life of me get plug #3 to fire.
I have replaced stator, trigger, Both switch boxes and the rectifier and have had no luck.

I am at a loss for next steps.

 

[flyingscott]

Are you sure you have a V6? I don't believe Mercury made a V6 90 hp motor. Is it an Inline 6? Have you done a compression and spark test.

 

[gardneca195]

Yes, it's an inline 6. I have done compression test all cylinders are good. My concern is purely electrical.
I am not getting a spark on cyl 3.

 

[racerone]

Swap # 2 and #3 coils and test for spark.------Or swap the switch boxes.------Then report and tell if there now is no spark on #5 cylinder.

 

[gardneca195]

Swapping 2 and 3 coils gives same result. When swapping 3 and 5 I get no spark on #5 and spark on #3.