Echo 590 vs 620P

[Woodpecker]

It still is!

All I know is I've put food on the table for my family with mine for a few years now. It's been a dependable saw. I don't really use a 60cc saw much, so I don't have a 620, but I've run enough of them to tell they are just as well built.

 

[huskyboy]

It still is!

I’m shocked mustang mike doesn’t own one.

 

[Nutball]

The stock 362 was almost 2 seconds faster in a single cut comparison with a stock 590, same chain, self feeding only. Then when I force fed them the 590 was 4 seconds faster, seemed to have a little more torque too, but the 362 had a couple short bogs, and seemed like the MT leaned it too much towards the end.

 

[RI Chevy]

Should never have to lean on a cut. Let the chain do its work.
Just prematurely wears out bar and chain.

 

[Nutball]

I wasn't leaning hard. I just meant I added extra force over just the powerhead weight. Even in the self feed cut the 362 seemed to lean out at the end and lost a little power. I'll get more run time on it, calibrate it and check the plug color.

 

[TreeLife]

Should never have to lean on a cut. Let the chain do its work.
Just prematurely wears out bar and chain.

Must have missed that in my last "how to run a chainsaw seminar"

 

[RI Chevy]

LMAO.

 

[huskyboy]

Idk I just run each saw where it makes its best power in its powerband.... wherever that is. I know by feel as soon as it hits the wood how a particular saw wants to be ran. The same can be said for tune. I tune them where they run best, wherever that is.

 

[huskyboy]

That said, with a good chain you shouldn’t have to push hard to get the best cut times. If you have to push hard to get a good time, it wants more chain.

 

[Nutball]

That said, with a good chain you shouldn’t have to push hard to get the best cut times. If you have to push hard to get a good time, it wants more chain.

Keep in mind the rpm factor, some woods seem to like lower rpm. I tried making a chain more aggressive once so it would self feed as fast as I force fed it through Ash, and it never got there. The cutting performance started going down at a certain point. You want some control left over too in a work saw.

Tomorrow...if it's not raining, I'll test a stock 550 against a stock 362, if I can get the same chain to work on both. The 550 made a 14s (same as 362) cut in the same log as the 590 vs 362 test. Depending on how it does, I'll then try a ported 550 vs 590 vs 362 comparison video .

 

[RI Chevy]

cool

 

[huskyboy]

I do get what your saying with chainspeed and rpms in certain situations. Too much chainspeed just skips over the top of the certain hardwoods like ash. Makes dust...doesn’t dig in and make chips like torque/leaning on it a bit does. Have to play with chain filing to suit the individual saw, stock chain leaves a lot on the table. A blank slate.

 

[Big cut]

My porting bible happy reading. http://iheartstella.com/resources/manuals/tuning/Graham-Bell-Two-Stroke-Performance-Tuning.pdf

 

[Big cut]

The air filter material is highly restrictive, but the large surface area of it makes it not very restrictive overall. I think I'll still convert at least half the filter to nylon mesh. Large surface area filters should be good in the sense that the airspeed through any one part is slow, hopefully so slow that gravity and inertia will prevent the saw dust from getting stuck in the filter, at least the heavier stuff.

View attachment 204336 View attachment 204337

On my 620 the black piece inside the air filter had large injection mold flaws inside the carb side hole. 1/8 ridges at about 2 oclock 10 oclock I ground them smooth with the dremal. I also port matched just the the height of the air filter outlet to the round section of the black thing. The muffler did not match the exhaust port on mine either. Hole was 1mm tall but 1 narrow on the muffler inlet. Also cut the inner deflector off the muffler. IMO I would not mess with the muffler tube or drill bypass holes. That muffler was designed to extract the exhaust gases thru that pipe. The japanese engineers are not stupid. Quick easy manufacturing flaws to fix.

 

[Kerfed]

Bumpin the thread. Haven’t ran a 620 but have been surprised with the 590’s performance. Thinking to get one of these ported so it will really rip for the weight.

 

[dahmer]

Bumpin the thread. Haven’t ran a 620 but have been surprised with the 590’s performance. Thinking to get one of these ported so it will really rip for the weight.

I have a @Red97 ported 590. Love that saw, everybody that runs it is impressed.

 

[dahmer]

Only drawback to the 590 is the odd bar pattern that the 20” bar is only 70 dL, not your standard 72 dL. But thanks to Tim, @Cat 525, I bought enough 70 dL chains from him to last the rest of my life.

 

[Cat 525]

Only drawback to the 590 is the odd bar pattern that the 20” bar is only 70 dL, not your standard 72 dL. But thanks to Tim, @Cat 525, I bought enough 70 dL chains from him to last the rest of my life.

Just cut more wood longer! Keep you from croakin!

 

[Kerfed]

On sale for about $460 few days ago, set pretty lean off the shelf. Going to run it and 590 after tuning with the same bar and chain. See how it compares to @Nutball findings.

 

[Nutball]

I'm back from a long vacation. Youtube just deleted my channel today, so there won't be many more comparisons, except in writing.