1989 75HP Merc 4 Cylinder intermittent fire on Cyl 3

[comstox]

I have an 1980's (I think 1984, sn/06558246) Mercury 2 stroke, 4 cyl engine that has an intermittent spark on cyl 2 issue. Which is MORE LIKELY to have failed, the Stator, the switch-box assembly, one of the four ignition-coils, or something else?
Here are my symptoms: I get no spark on cly 2 and I KNOW it is happening because I feel it drag. Sometimes it stays that way for a long time, then all-of-a-sudden..... WHAM! I'm off and running on all four! No warning, just WHAM!
I have an 80HP merc of almost the same age and I took an ignition coil from the 80 to try with no luck. I'm swapped spark plug wires to test, no luck. I've even swapped my number 1 ignition coil with no luck.
WHAT is my most likely cause for NO SPARK on #2?
Thanks in advance guys!

 

[comstox]

In response, maybe I could ask this: WHICH LEAD from the stator goes to cyl #2?
My stator is part # 398-5454A26 - Stator Assembly

 

[Faztbullet]

Switchbox or trigger

 

[comstox]

Is there a good way to test a switch-box assembly? Mine is Mercury part number: 332-5772A 5 and looks like this: [h=1][/h]

 

[racerone]

The terminals are colour coded.-----You would switch trigger lead for # 1 with # 2 and post what you find with spark.

 

[comstox]

The terminals are colour coded.-----You would switch trigger lead for # 1 with # 2 and post what you find with spark.

THAT sounds quick and easy! Thank you!!!

 

[comstox]

The terminals are colour coded.-----You would switch trigger lead for # 1 with # 2 and post what you find with spark.

racerone, I did just that, (Swapped trigger leads #1 with #2,) and determined that I DID GET SPARK on Cyl 2. I have an 80HP Merc that had the same switch-box part number and when I swapped it out I now get spark on ALL FOUR CYLINDERS!!!!

Thank you for all of your help guys! You guys helped me save my Memorial Day Boating Weekend!