The 310 is similar just smaller output than the 352, if you can get a 352 they cut well for their size, the newer replacement is the 3510, it is lighter built,
the specs show this too, the 352 I owned had adjustable carb screws, based on how it cut I would not get the 310 as it has less power.
The only thing I disliked about the 352 / 310 was the fuel cap, mine leaked, it would be fine when you put it down, but if the temperature
changed as it does at night, it leaked fuel, it leaked fuel after almost every fill, I even oiled the o ring on the cap so I wasn't stretching it
as I tightened, Tried less pressure, more pressure, it was always a hit and miss, there was no cracks or damage on any sealing surface,
or the o ring, I sold it and made a profit on it, but it was nice saw, light, easy on the fingers and hands / vibes too, the man who got it off me
has never come back so it must be doing well, and he cuts firewood, I suppose the small stuff with the 352. I bought a Makita EA4300, and like
it a lot more, its a far quicker cutter, and the extra weight has yet to bother me, but the echo started with less pressure if you have arm / muscle problems.
Thanks, I checked out the CS-3510 and was underwhelmed. Compared to the The CS-310, the build quality seemed inferior. It also doesn't have as good of consumer reviews as the CS-310. For example the clutch cover and brake handle seem really flimsy and thinner then on the CS-310. Other plastic parts are also noticeably thinner and feel cheaper. That's probably what they sacrificed to get the weight reduction. Antivib seemed about the same. I'm sure the CS-3510 will outcut a CS-310 but I'm not looking to win a cookie cutting contest. I really liked the balance of the CS-310 with 14" bar. I've seen guys claim that the CS-310 responds well to a muffler mod and carb tuneup.