1985 mercury 25 hp not firing on one cylinder

[goblerblaster]

I have a 1985 merc 25 hp serial OB171748 that is only firing on one cylinder. I switched the firing coil to the non-firing coil wires- and the firing spark plug to the non- firing coil- and still got no fire. I switched the non- firing coil to the wires on the other coil that was firing and got no fire... what is my next place to check??

 

[goblerblaster]

Let me try it another way to describe.... the motor is a two cylinder. It is getting spark on one cylinder and none on the other. I took the spark plug that was sparking and put it on the coil that feeds the non-sparking cylinder- and got no spark on that cylinder. I then took the coil from the cylinder that had been sparking and attached it and the good spark plug to the coil WIRES that feed the non=sparking cylinder. I still got no spark . Is this likely to be the power pack, stater under the fly wheel ?? What and where should I be checking next?

 

[RCO]

Most likely the trigger under the flywheel. Go to the cdi electronics website, they have the testing procedure listed.