I did check... that's how I found 1 loose and 3 missing after a days worth of use.I have/had saws by Hitachi, Dolmar, Efco, Husqvarna, Solo and Stihl and I can't ever remember seeing screws secured with lock washers. But then again with your vast experience of 50 IC pieces of equipment I am bewilderd that you didn't check beforehand and replace immediatly to satisfy your quality criteria.
7
Based on your multiple replies to me on this and other threads, I can see your just trying to agitate/pick a fight with me (see TOS).
(I.e., Rather than letting an equipment owner new to Echo brand (me) post first hand experience that is contrary to your brand loyalty.)