Home › Forum › Ask A Member › The engine ran great!!!….except when it didn’t. › Re: The engine ran great!!!….except when it didn’t.
If a plug wire is not properly seated in it’s coil, you can get spark jumping to ground there – especially if humidity is high (like with the morning dew). This could explain why your problems happened in the morning. If this is the case, carbon tracking where the spark jumped will make this problem worse. I’d remove the coils and check for carbon tracking and clean if necessary. Also be sure the boots are on the spark plug wires where they connect to the coil. There was a message string here in the last month or so that had a photo of carbon tracking that bled off a spark under a coil on another OMC motor with magneto same or similar to yours.
What Mumbles described can also lead to problems aggravated by humidity.
Dave