I had an ECHO, I hated the muffler exhaust direction, it was always kicking up sawdust.
I thought my Stihl Farm Boss was the perfect saw,,
THEN, one day I walked into a local farm store, picked up a Stihl MS261CM,,, It is CRAZY LIGHT!!
I instantly bought it, and at the time I did not even know it was fuel injected.
(I bought it totally based on the extremely light weight)
So, now, for the most part, the Farm Boss, and the MS660 ride the shelf in the shed,,,
I should sell them, I doubt that I will ever use them again, now that I have run the MS261CM,,,
The 261 does everything perfectly, first start, restarts, shutoffs, power. It is a unique saw.