Thanks for the response but I’m certain the ecm is the problem as the boat sank in salt water and the internals of the ecm are extremely corroded. I had the engine rebuilt and ran the boat for about a month with no issues then all these crazy symptoms started that lead me to the ecm I cracked it...
Currently looking for an ecm for a Volvo Penta 8.1 GI-H # 3885461 anyone have any leads or suggestions on where to find a new or used one or a unit that will cross over thanks.Dave