Odd update: Took the boat out yesterday, it ran great in the morning until early afternoon, then started running awful. Took it out today, ran horrible again right from the start. We fished a few hours, then I said I wanted to try to diag it again. I was going to pull off one wire at a time and run it so I shut it down, took the cowling off, started it back up to run it until it skipped but it ran flawlessly immediatetly after I took the cowling off. I ran it all over the place with the cowl off and it was perfect; put the hood back on and it was still perfect. ??? Which was similar to the first day I tried to diag it.
2 thoughts=air blockage in the cowl. How and where does the air get into the cowl on a black motor? Other thought is what I thought before, something electrical heating up. taking the cowl off gave it enough cool air to stay working properly?? But even after I put it back on it was still perfect up and down the lake.
No clue anymore...