I have used the crock pot method on my own engines and those of many of our club members. It never fails to work well, high for about 12 hrs.rinse in warm water, blow out with air and let stand until dry. Assemble with ATV to prevent
dry parts from seizing or galling.
STAY AWAY FROM OVEN CLEANERS......................THEY MAKE ONE HELL OF A MESS. If you want a Black stained chunk of metal that looks worse than the stufft you are trying to remove than g

o for it!!!!!!! (NOT)