Bought another ECHO...

[Rustyiron]

Arrow I thought that you were a logger. One of your replies above made me question my memory as you sounded more like a petrochemical engineer!
I run pump gas and it's not like I'm running the saws daily either, but I have zero problems with it. I do "stabil" my fuel 4-5 5 gallon cans before I do a gas run just because it's cheap insurance and easy. The 50/1 mix also contains a stabilizer and a 5 gallon can of mix can last me a year. I do keep the cans in a building and off of the ground, mostly to preserve my good old metal cans. (with no govt mandated auto spilling devices).

 

[5030]

Last time I checked, ALL Echo saws have adjustable bar oilers and the adjustment screw is usually on the bottom side of the saw near the clutch housing.

 

[5030]

Arrow I thought that you were a logger. One of your replies above made me question my memory as you sounded more like a petrochemical engineer!
I run pump gas and it's not like I'm running the saws daily either, but I have zero problems with it. I do "stabil" my fuel 4-5 5 gallon cans before I do a gas run just because it's cheap insurance and easy. The 50/1 mix also contains a stabilizer and a 5 gallon can of mix can last me a year. I do keep the cans in a building and off of the ground, mostly to preserve my good old metal cans. (with no govt mandated auto spilling devices).

All my gas I use in the lawnmowers and pressure washer is e-gas and like you, I pre treat before filling the cans with Stabil, but not the red stinky stuff. I use the blue Marine Stabil myself. Of course none of that 'crap' ever gets in my chain saws or weed whackers, always canned gas. Of course my use of e-gas for the lawn equipment will drop off quite a bit in the spring when my Kubota F20 diesel lawnmower is delivered and the CC 60" tank goes down the road. I've had enough of those gas guzzling V twins.

 

[Rustyiron]

It's been a year since I did my comparison and I didn't remember all of the differences. But they were enough for me to decide on the 620 over the TW. Aluminum handle and magnesium? Sprocket cover and the Stihl/Husky guys on YouTube admitting that for the price, they really didn't have anything bad to say about this saw. I
And anymore, most saws are faster than I am anyway.

 

[Rustyiron]

All my gas I use in the lawnmowers and pressure washer is e-gas and like you, I pre treat before filling the cans with Stabil, but not the red stinky stuff. I use the blue Marine Stabil myself. Of course none of that 'crap' ever gets in my chain saws or weed whackers, always canned gas. Of course my use of e-gas for the lawn equipment will drop off quite a bit in the spring when my Kubota F20 diesel lawnmower is delivered and the CC 60" tank goes down the road. I've had enough of those gas guzzling V twins.

Yes, blue stabil

 

[5030]

Actually, my 590 came rich from the factory and I've left it alone though I may adjust it later on. Running the modded saw with the 40-1 Tru-Fuel in it, it 4 strokes a tad bit but I won't touch the limiter adjustment screws until I switch it to 50-1 after a few tank full's. The muff mod is the really big difference between stock and modded. The issue with removing the last baffle plate from the diffuser is, you have to do it carefully, as it's spot welded to the diffuser, I used a small die grinder to break the spot welds and you have to be very careful as the diffuser isn't all that thick to begin with. Of course I want to keep the spark screen intact as well. You can buy a 'billet machined' diffuser if you don't want to mod the stock one but they aren't cheap. I believe they are around 50 bucks, the home mode costs zip. Between that and adding some slots in the inside plate in the muffler really wakes them up and improves the exhaust tone as well.

Like I said, mine will rip the full 20" bar in seasoned oak, no issue. Don't even bog down at all and I suspect even more when I go to 50-1. Only thing I don't care for is the plastic clutch cover actually. That can be addressed as well at some point.

 

[arrow]

If you delve a bit deeper into the 'canned' fuels, you discover that none of them contain conventional gas at all. They are all chemically different from any pump gas. I quit using pump gas years ago myself. If I was a volume user which I'm not, I would use non ethanol regular pump gas and Echo Red Armor pre mix. Echo Red armor has the least amount of ash in it, thus the exhaust port stays free of and deposits as well a as the spark arrestor screen.

I can let my saws sit for extended periods with Echo Red Armor canned fuel in the tanks (not I keep them topped off as well) and they all start on the first or second pull, no issue. Interestingly, my ancient 028 WB likes the canned fuel much better as well. It actually idles now. I'll probably need to Vac test it soon. I cannot believe the crank seals are not leaking after 45+ years.

Well, I'm going by what our VP sales distributor has told us. He states their product starts off with non ethanol 94% octane gas with a whole bunch of chemicals added to it..
VP copy says the same thing. VP-SMALL-ENGINE-FUELS-Small-Engine-Fuel-494L03.
Somebody probably does make some kind of synthetic mix but all of this is pricey. Does have its place however.

 

[arrow]

Arrow I thought that you were a logger. One of your replies above made me question my memory as you sounded more like a petrochemical engineer!
I run pump gas and it's not like I'm running the saws daily either, but I have zero problems with it. I do "stabil" my fuel 4-5 5 gallon cans before I do a gas run just because it's cheap insurance and easy. The 50/1 mix also contains a stabilizer and a 5 gallon can of mix can last me a year. I do keep the cans in a building and off of the ground, mostly to preserve my good old metal cans. (with no govt mandated auto spilling devices).

No. I'm no scientist.
I just get to talk to a lot of vendors doing what I'm doing now working at a place that sells tractors and other outdoor equipment.
It's interesting for sure.
40 to 1 has more oil in it. It is a "richer" oil mix but makes a 2cycle engine run leaner because of the less gas molecules thus larger air/fuel ratio.
Depending on what we see in the shop, VP runs cleaner than the Stihl 2 cycle pre mix we sell.
Then there's the vegetable oil pre mix stuff for the tree huggers.
I also hug trees but mostly when they've fallen and I have to get a choker under them.
I like my trees horizontally.

 

[5030]

Never used VP and rumor has it (on the arborist forum) that the Stihl pre mix makes a lot of carbon in the mufflers and exhaust port. Again, don't know as I've never used it. My 45 year old 028WB has a a pretty steady diet of either Tru-Fuel or Echo Red Armor and last time I had the muff off, it was clean. I don't run it often, sometimes it sits for months on end and it always fires up on the second pull. I do keep my saws in a climate controlled shop however.

 

[xyz123]

VP is 66-74% alkylate range just like the others but wont say solid #.

Most are 74% and why last 2 years when been opened and 5+ years stored sealed.

Search on it sometime all out there in their required data links.
Dont just take some salesmen or reps word. Most dont have a clue. They just sell and dont even look up to know what they are selling.

All I need is my Efree 89 and VPracing oil, good for 6 months for sure and have stored longer in boat and gen without ever a problem.

Ethanol 90 days and less and draws in moisture. Crap gas even needs special lines. Melts the old ones to a glob.
Why we see green lines in stihls when started changing over years ago.

 

[arrow]

VP is 66-74% alkylate range just like the others but wont say solid #.

Most are 74% and why last 2 years when been opened and 5+ years stored sealed.

Search on it sometime all out there in their required data links.
Dont just take some salesmen or reps word. Most dont have a clue. They just sell and dont even look up to know what they are selling.

All I need is my Efree 89 and VPracing oil, good for 6 months for sure and have stored longer in boat and gen without ever a problem.

Ethanol 90 days and less and draws in moisture. Crap gas even needs special lines. Melts the old ones to a glob.
Why we see green lines in stihls when started changing over years ago.

View attachment 848145

You're not wrong a lot of times about sales ppl but our VP guy is pretty knowledgeable and pretty straight forward.
Knows more stuff than I care to listen to.
I like the Sea Foam stuff once in awhile.
Man, I wish the puritanical east coast had non e gas at the pump.
For the he pols up this way, to sell the stuff is akin to opening a cat house next to a grammar school.

 

[5030]

Been discussed to death on the Arborists forum btw. I'll stick with my Red Armor canned fuel. Give it the 'sniff test' none of them smell like pump gas and your nose will tell you that. Gasoline has a distinctive smell, any gas and all gas does.

 

[arrow]

Been discussed to death on the Arborists forum btw. I'll stick with my Red Armor canned fuel. Give it the 'sniff test' none of them smell like pump gas and your nose will tell you that. Gasoline has a distinctive smell, any gas and all gas does.

Neither does VP but it’s from a gasoline derivative.
Too many other chemicals in it to tell by the nose.
Gas l pumped in the 60’s smells different from the gasoline of today.
It had a much more tasty smell back in the day.

 

[5030]

Neither does VP but it’s from a gasoline derivative.
Too many other chemicals in it to tell by the nose.
Gas l pumped in the 60’s smells different from the gasoline of today.
It had a much more tasty smell back in the day.

That is the corn alcohol in it that causes the stink.

 

[arrow]

That is the corn alcohol in it that causes the stink.

Back to pertinent stuff.
Your 590 after mods seems stronger than my Husq 357. Heck, it seems to be able to run with a 620. I cannot run a buried 20 inch bar on the 357 w/o a bog. I wonder what the 590 would be like without the modding.
My 357 is unmodded.

 

[5030]

Back to pertinent stuff.
Your 590 after mods seems stronger than my Husq 357. Heck, it seems to be able to run with a 620. I cannot run a buried 20 inch bar on the 357 w/o a bog. I wonder what the 590 would be like without the modding.
My 357 is unmodded.

I cannot answer that as I modded it before I used it the first time. One of those people who cannot keep my fingers off any saw, even a new one. I will say, with the muffler mod, it has a nice exhaust note. Very deep.

It's still on 40-1 and will be for a few tanks of fuel before I switch it to 50-1. I like to make sure everything is 'bedded in' properly before going to the recommended ratio and I didn't touch the mixture needles though I did pull the limiter caps.

 

[5030]

I tend to do every muffler no matter what, simply because the mufflers are the main choke point with any modern saw, especially Stihl's.

 

[xyz123]

Years back some stock saws were tested by me and a friend.

2 were 357 and 590. 590 are grunt saws they have a long stroke. Look at that bore and stroke I posted.

620 should be ahead of both stock for stock imo.

16" round dry ash.
Husqvarna 357xp - 16.22
Echo cs590 - 16.37

 

[5030]

Years back some stock saws were tested by me and a friend.

2 were 357 and 590. 590 are grunt saws they have a long stroke. Look at that bore and stroke I posted.

620 should be ahead of both stock for stock imo.

16" round dry ash.
Husqvarna 357xp - 16.22
Echo cs590 - 16.37

View attachment 848532
View attachment 848535View attachment 848536

Mine seems a bit heavier than that. I'll have to weigh it sometime. Is that just the powerhead and full of fuel or with a bar and chain included? Conversely, my ancient 028 feels much lighter.

So the 590 is a long stroke saw, that explains a lot about how it pulls a 20" bar in full cut ripping in a seasoned oak log. Never looked at the physical specs myself.

 

[5030]

I almost bought the 620 when I bought the 590 but didn't. That was brain fart time.