1994 Merc 115 has no fire to lower cylinder

[Buzz32565]

1994 Merc 115 has no fire to lower cylinder. Verified fuel is present. Swapped coils, no help. Replace switchbox, no help. Any ideas? Thanks!

 

[Dave1027]

Re: 1994 Merc 115 has no fire to lower cylinder

1994 Merc 115 has no fire to lower cylinder. Verified fuel is present. Swapped coils, no help. Replace switchbox, no help. Any ideas? Thanks!

So you have verified you have no spark at cylinder #4? Just want to clarify. Cylinder #3 sparks just fine?

Bad plug wire?

You should probably DVA test the coil output. Could be something is wrong with the trigger I guess. Do an ohms test on the trigger.