FYI, cleaning engines can be a hassle, I learned this trick a long time ago and it works well.
Strip your engine and remove any and all "O" rings such as on the carb. Place all the parts including the muffler in a garage sale CROCK POT and cover with full strength anti-freeze and turn on high, let "cook" for 6 to 8 hours in a ventilated area.
Remove all parts with "HOTDOG TONGS" and flush with water, any left over burned on oil will come off easily with a small metal brush. You can store the crock pot with anti-freeze in it with lid on under your work bench or somewhere where it won't be in the way, the anti-freeze will last for a very long time.

I guess I shuda done a "search" on this subject before posting, it seems there are at least FORTY pages on cleaning engines and parts........