I gave the crock pot soaking a try. Works great on low. I left the 108 in overnight and it is clean but started to turn grey. The next one was a scrungy 48 four stroke. I left it 4 hours and stirred ocasionaly. every dirty spot touched with an old tooth brush came clean and it looks like a new engine. I cooled it in cold water, turned it over to get trapped fluid out of the exhaust, carb, crank case, and head. then I hosed it down with wd40 in all the openings and put it on the test stand. It started right up and runs very well. My pot probably gets too hot for longer than four hours soak. it only has high and low settings. it still steams a little.