spaco wrote:
I don't know how often you might want a really clean part, but the auto
parts stores sell a gallon can of carb cleaner that REALLY works. the
motor heads call it "boiling out the carb" to use it.
You don't heat the stuff, though.
The gallon can, like a paint can, has a basket inside that you toss the
parts into. Read the label.
Looks like brand new when done.
Costs $30. Lasts for many years with the lid on tight.

What he said, good stuff but be sure to turn
your head away when you open the can. The
vapors will sting your eyes good.