In article ,
"Pete C." wrote:

Pete, what mix ratio did you use for the Simple Green and how
well did it clean? Did it remove the black carbon that's usually
in the barrel(s) of the carb?

I don't recall the exact ratio, fairly strong like 25% SG. No carbon in
this particular one, it was from a small pressure washer engine.

Thanks Pete. IIRC, the HF ultra sonic was pretty reasonably
priced.