LOL, Echo refers to a line of equipment, with their legendary 21.2cc motor, with the 225 designation. For instance, SRM-225 (straight shaft trimmer), GT-225 (curved shaft trimmer), PE-225 (edger), SHC-225 (hedge clippers), etc. They all have the same motor/powerhead. Solid motor, crappy non-adjustable carburetor.
I am looking for a replacement, preferably fully adjustable, if there is such a thing. The OEM carburetor is trash IMO. I will never buy another piece of Echo equipment with the non-adjustable carb.