Also there was oil coming out of the top spark plug cover.
Tighten everything on the motor, I've seen more than one of those EHO engines come through with loose screws.
I've never seen such a collection of miss information or bad information as this thread.
PS: I do like the OHC in the Honda, but the Iron liner in the Subaru makes it far better than the Honda.
Wrong no iron liner in the EHO
IF you had too much oil in the engine to begin with, what happens is 2-fold. One, the oil will start to foam. Not a good thing as the foam, instead of the FLUID oil is NOT lubricating the system properly. The second problem is that too much oil will cause a high pressure which can blow out seals/gaskets.
can't happen on the EHO as the oil reservior is seperate from the crankcase
A bad check valve on the breather.
no check valve on the EHO
100ccs of oil, as called for in the owner's manual, is too much
Run what Robin says to run, the oil is part of the cooling system, do not run it low.