Originally Posted by yellit

The Harbor freight 70~90 buck unit works much better than I thought it would...
Model CD4820.....160 watts.....

I use it to clean everything now....I like it better every time I use it....

It seems to work best with very warm water and a few drops of liquid detergent....(just to act as a surfactant)

My co worker bought one for firearm restoration parts cleaning.....after seeing it in action, I had to get one......

My best results are obtained by changing the water very often....almost after every 4 minute cycle during the initial cleaning.......no problem to just dump it out and refill with warm tap water....and a few more drops of dish detergent....
After the major crud is off.....you can keep the water longer

I had one of the transducer wires burn into at the spade connector....turned out to be a poor crimp....I soldered everthing I could see that was crimped and it runs like a champ....no regrets....a pretty tough little machine...it really boils the crud off injector parts....