Ok my engine has a rear facing exhaust. with a collar<removeable> that would rotate to point the exhaust<45 degrees> in any direction.
I have popped off the back plate and removed the head with out 2 much trouble.
Internally it looks like there is a lot of dyed up fuel/oil the stuff feels gummy.
Would anyone have a suggestion on a solvent to soak the engine in the remove the gunk ? WD40 ?

Thanx again.