I have a new (slightly used) os 46. It ran great the first day out. But today, it's giving me fits. I've checked fuel flow from the tank, high end settings, low end settings, prop size, glow plug. It still acts erratic on the high end (tends to bog down or out).

It appears that there is a leak under the head. I removed the head and reseated it (no gasket). It still seems to leak. Would this cause the bogging problem at the high end? How do I get the head fixed?

Thoughts?