Well, when I keyed this in I see someone else asked the same question back in 2018. I was cleaning up the garage and putting up some more shelves. I plan on one shelf, maybe the whole wall, being an Echo wall. First while cleaning I found a bunch of 14" chains hanging on a nail and knew they went to my CS305. Pulled it off a shelf where it's been sitting for at least 2 years. The plastic block where the top handle mounts to the chassis is cracked. Pulled the choke out and cranked 10-15 times and it started right up on the old gas, idles, revs, and sounds great. Then I found the CS500Vl a friend gave me close to two years ago. It had a little fuel in it, but I added some fresh to help out, and put a shot in the carb. Couple pulls and it fired right up. When my friend gave it to me he said it would start and idle fine, but you had to let it warm up for a good 10 minutes before it would run well at WOT. I tried blipping the throttle and it just would not rev up, it would kind of sputter and break down. After idling for about 10 minutes I picked it up and hit the trigger. Holy cow, that little bugger REVS! I can't wait to get it in some Ash this coming week. I think it will run circles around my MS290. Down stairs I had a 650EVL on the work bench. This saw was very clean, had great spark, but wouldn't fire. Pulled the muffler and there was a streak from the ports to the bottom of the piston skirt (if I'm remembering right). I think it was straight gassed very early in it's life. Last one today is a 750EVL given to me by the same friend that gave me the 500. The ignition module is gone on it. My BIL works on a farm and they have a 601VL that wouldn't run. I dumped the old fuel out, put fresh in, primed it and it ran like a champ. Then my BIL couldn't get it to run again. I think I'll offer Doc $20 for it. The 750 has a 28"bar, the 650 a 23", 500 20", and 305 14".