Engine cleaning
If you are the spray on type try the carb. cleaner it works better than brake parts cleaner. Just remember the carb. cleaner is flammable! With a little effort with a scotch pad, an old toothbrush and a paste made from Ajax and Isopropyl rubbing alcohol I have been able to make all of my used engines look like new. Using the Ajax method with the carb. and exhaust outlet covered you won't have to disassemble anything either. Try it you might be surprised. Take care, Cliff