[Fot] Ultrasonic cleaners

[John Frymark]

I ran a business building and selling industrial ultrasonic cleaners  
and the very best automotive applications were for carbs and auto  
transmissions (no greasy dirt). The key is time and temp. Optimal temp  
is 185*F and time depends on the material: soft metals go shorter  
duration. CA EPA aside, we never advised using solvents, only aqueous  
based cleaners (Brulin makes some exceptional products) followed by a  
thorough rinse and dry. NFI.

John Frymark