Used. Untested. Clean. No Smells even from fuel but there is a slight synthetic residue smell that is not very obvious. Seems to have little wear or was rebuilt but a carburetor expert/restorer can give you a better opinion. It sat in box on shelf for many years. I can ask a local carburetor/restorer expert any questions you may have and then I will update listing if necessary. I have more photos, just ask. I’ve reached limit of photos and video. I can message you more photos.