ORIGINAL: Grimracer
If you see a buildup of oil between the cooling head and the case.. and its on the front right side of the engine.. you like me are stumped cuz almost all my motors do that on my test stand.. I have no idea how it collects in the same place every time..
The oil on the outside of the engine is most likely coming from the front bearing where the oil leaks past it and then is blown by the propwash.
Many various makes of glow engines have this condition.