2004 mercruiser 4.3 thunderbolt ignition

[jefftabita]

How do I troubleshoot no spark condition. I have fuel and it started and ran but after shutting off key wont start or seem to spark. only 184 hours on garage kept boat.

 

[alldodge]

This is for TBV but its the same for TB4

 

[jefftabita]

Thanks I found same one after posting question. Will try to follow this and let you know. Thank you for response.