Hm... well, then it's manual buying time, and the boat is done for the season. I was hoping that it would be something like oil injection problem to one of the cylinders, and that running pre-mix would help. Bummer. As far as removing the head, should that be done with the engine in or out of the boat? My entire upper body is still aching from leaning into the engine compartment, and I can't kneel in the engine compartment due to bad knees, and 2 herniated discs in my back. How hard is it to pull an engine? Or should I just deal with it in the boat to save grief?