I have a question for those familiar with ignition modules: I have been trying to get a small gas engine running but have had no luck. Checked for spark and one was there so I have been chasing carb issues as the likely culprit. After about 4 trips to the field with no success, I finally swapped out the module and it started on the first flip. So, my question is this; How can the module throw a spark but not allow the engine to start? During the process, I even tried an electric starter to check it with a fast spin rather than a hand-flip. No luck. Bye the way, the module has been used sucessfully for the first 3 hours of operation prior to this issue.

What could occur internally that would allow for a spark but not allow it to run?

For those who can offer an explanation, thank you in advance!