No Spark Cylinder 2 1997 80hp Outboars

[fishfun83]

My C80TLRV 80 horsepower 1997 Yamaha outboard recently started missing. I came to the conclusion it was cylinder 2 by removing the spark plug wire on cylinders 1 and 3, one at a time, and noting the change in RPM of the motor. When I removed the wire from cylinder 2, there was no change. I changed all three spark plugs but that was not the problem. I checked the compression on all 3 cylinders and they were at 90 psi. I switched the coil from cylinder 1 to cylinder 2 and still no spark on 2. What do I need to check next? Appreciate any and all ideas.
Thanks,

[boscoe99]

Have you tested the crank position sensor?

[fishfun83]

No I have not checked that. I will see if I can find out where it is located. thanks.

[99yam40]

Does that 3 cylinder motor have just 2 pulser coils like the 90s?
My C40 has 3 , one for each cylinder to tell it when to fire.

Measuring the ignition systems peak voltages into and out of CDI should direct you to where the problem is located

[fishfun83]

The C80TLRV only has 1 pulser coil.

[rodbolt17]

and that 1 pulser coil controls spark on 1&3. 2 is made up in the CDI based on the CPS input.

[fishfun83]

Measured the resistance of the CPS this morning and got a reading of 200 ohms. Manual says it should read between 158 and 236 ohms so I guess I am off looking for something else.

[fishfun83]

After I measured the resistance of the CPS I looked up the cost of a new CDI and find it is around $600. So before I spend that money, I want to be absolutely certain the CPS is bad. Are there any other tests I should run to totally rule out the CPS. Help is really appreciated.

[rodbolt17]

using a peak reading volt meter or a digital meter with a DVA adapter.

check the output. voltage

[fishfun83]

I went ahead and replaced the CPS on the outboard and unfortunately, that is not the problem. Will start a new thread on how to check out the CDI. Thanks for all your help.