It just doesn't run right-200 Merc

[randlemanboater]

Something I have done when searching for a skipping cylinder is to disconnect the spark plug wires one by one. *When you unplug good cylinders, the skip will be much worse, when you unplug the bad one, there will be little or no change. *

I reccomend turning off the engine between each test so you dont get zapped.

And dont run it too long or you will gum up your good cylinders.

The other way I have used is simply pulling the spark plugs after running the engine, the bad cylinder should be drenched in gas/oil, as long as your issue is not a fuel issue.

Hope this hasn't been covered already, I didnt read the whole thread.