Had the above pop up on my screen. Second time out this year about 5 minutes after start up and under way. Boat has 250 hrs, started up without problem yesterday and ran like it always has. Was running fine and continued to do so thru all revs. Headed back to dock to shut the boat off. Then restarted and nothing on the screen and rest of trip was uneventful. Any ideas? Random misfire? I have to admit they are the original spark plugs , they have always looked good in the fall winterization. Think I will see if and when it happens again. 2009 340 cat