I have recently had to replace an MS180 and an MS241CM on the estate I help manage the forests in Waterford, Ireland. The estate owner wanted something as light as possible and as easy to start to replace her 180. The 390ESX will mostly do small firewood and felling jobs and some carving as my own saw. These are my initial impressions after a weeks use, mostly on firewood and small clean up duty.
I acquired both saws through RobD aka ChainsawBars.co.UK.
I have to admit that both saws had their cats removed first thing. I couldn't source a non cat exhaust for the 361 in time, so had to mod the existing exhaust. Mine was crimped too well to easily pull apart without cutting. So I simply opened up the top plate autopsy style and ground out the cat. On the 390esx, the seem was easy to pull free, and I managed to simply pop the cat right out and reseal. Both exhausts appear to be made from annealed 304 or 316 stainless similar to what STIHL currently use. It's no surprise really, Japan is an island and mild steel exhaust won't last very long.
I didn't get to weigh the 361, but it feels considerably lighter than the 390ESX, which felt lighter than the ms241.
The 390ESX is 10lbs 2.5 ounces on my kitchen scale. Yes, it fits. With the cat removed it is just a bit under 10 lbs. My MS241 is 10lbs 9 ounces.
Some folks complained about the exhaust on a 390 burning the brake arm. I never had this issue, and did check the arm often. I did read about it, though, and so bent the exhaust cover just a touch in hopes to prevent such an issue before reinstalling the exhaust.
I have also heard some folks say the ECHO are too shiny. I don't mind it if it's easier to find in the brush. And I like the looks and feel it is a quality product. Before Husky and STIHL started to go more of an industrial look, STIHL had a much more eye catching colour on their saws. Here's my 10mm 044 as an example. Most older STIHL's have faded since their manufacture, so that they look as dull as the new models.
The controls feel a bit small, but these are small saws. Especially feels small on the 361 since the clutch side fasteners appear to be 11mm VS the standard 13mm. I think they could have, and should have gone with standard bar nuts. It requires it's own spanner this way. The triggers and deadman's grips are fine, though. The 390ESX feels small over-all even compared to the MS241. I think the handle could feel a bit more robust on the 390ESX, but it doesn't appear flimsy. Maybe I am used to more rubberized handles. I love the simple cut off switch metal toggle they each have; especially since this American is used to up being on. In fact, that's fooled the estate owner once. I had to explain it's a U.S./Nippon thing for switches to be up to be on.
Here's the couple with an MS390 in the foreground, atop a 288XP is the 361WES and behind the MS241 on the right is the 390ESX. Behind them lies my 044 and a couple of pole saws.
Now the important part - performance. Bearing in mind the cats are removed - which also removes a baffle as well. Another thing to consider is ECHO have used a highly tuned version of their CDi on their saws for decades. It hugely increases the timing advance in the mid range(maybe 8-10K), which is also how the ports are set up on these saws(to produce maximum mid range torque), and this is where the saws shine. The 361 is zippy, even when ran rich to break in. But it doesn't quite have the instant pick up the old ms200t had. But, then again, you have to mod even a new 201 to behave anything like the old 200. In which case one could easily do the same with the 361 and likely still come well out ahead on costs. Still, on the catless 361, I enjoyed limbing and even working the Norwegian saw horse with it. This thing pulls extremely well for a 36cc saw. It would make a great topper for a bucket or climber. The only issue I had was the small fluid openings and the small fuel tank. But this is the price you pay for such a tiny and light saw. Overall a delight to use, and a capable tool for it's category. Add in the price, and I couldn't resist picking one up. In fact, I liked it so much I bought a 390ESX.
The 390ESX also enjoys the strong midrange the 361 had, just more of it. It has an electronic limiter(as did the 361), which I adjusted the H screw(with a D-shaped or PacMan tool) to just nudge up against it for break in(sounds like mid 13K). Running 325 NK, AKA, .325LP on a 15" SugiHara bar, it was very capable. Most folks have seen Rob's video of the 390ESX running 3/8LP chain. This thing seems to pull 325 just as well. I had no issues quickly cutting oak rounds with it, or snedding, or what have you.
It feels terrifically compact and easy to whip about while in use. And somehow is both light and 'solid' at the same time. Add in the normal sized fluid caps, decent fuel range, and standard bar nuts, and I'm rather happy with it. I'll try and put up a long term review by summer.
Cheers, Y'all