Echo CS-620 or CS-621, which to buy

[Ford3000]

I found a place that has a 620 and a 621 in stock.
I note the 620 is a shade lighter because it has no cat,
I note it has a shade more power because of this too.

So, is there any reason to go for the 621 over the older 620.
As far as am aware, the older 620 did not have that carb you
had to block a second hole in a jet to keep it from getting richer
as it ran, not sure am explaining the carb issue very well, I seen
tinman and I think Iron legs mention this, same with the 590.

And to cap it all of, I can get the 7310 for 1000.00 here in Ireland,
tough decision as I do not need the extra weight, but the price is
real good compared to a Stihl for the power offered.

Anyway, main differences in the 620 and 621 and which would you buy.

 

[Ford3000]

Nobody using either of these then.

 

[Dolkitafreak]

621 isn't out in the states, it is just more restricted though. 620 no doubt is the choice

Nobody using either of these then.

 

[Ford3000]

621 isn't out in the states, it is just more restricted though. 620 no doubt is the choice

Thanks, just wondering what the real differences is between them.
Did they change the piston, the ports, the air filter, the coil.

Not out in the US, that would explain why there are not many videos
of them, or inside them, seen Hotsaws101 poking through a 620, he seemed
to like it better than the new CS-7310.

 

[Piston Skirt]

Thanks, just wondering what the real differences is between them.
Did they change the piston, the ports, the air filter, the coil.

Not out in the US, that would explain why there are not many videos
of them, or inside them, seen Hotsaws101 poking through a 620, he seemed
to like it better than the new CS-7310.

Differences are:
1. Piston (ventilated)
2. Piston coating (Kaniboron vs old tin-plating)
3. Piston pin/clips
4. Upper pin bearing (higher thermal resistance)
5. Different rings
6. Different cylinder/porting
7. Different ignition map
8. Different muffler (no, still no cat)

Slightly more torque at the peak and slightly less of it at peak power.

Together with this model the rest of the “family” also received starter cover metal inserts, metric screws with pre-threaded holes and captive nuts.

 

[Czed]

@Red97 have you had the 621 yet?

 

[Red97]

@Red97 have you had the 621 yet?

Nope, not seen one yet.

 

[whitesnake]

Is this something that’s coming to the states?

 

[Piston Skirt]

Is this something that’s coming to the states?

Not likely.

 

[Ford3000]

Is this something that’s coming to the states?

Am sure it will eventually, why on earth keep making two
saws that are both in the same class, cc 's weight and ability,

Or maybe they are selling them off in the US, as if they offered
both most people would jump on the newer model.
May be they are doing this to empty their shelves before they
do a Makita / Dolmar / stop producing gas saws, who knows.

 

[Piston Skirt]

Am sure it will eventually, why on earth keep making two
saws that are both in the same class, cc 's weight and ability,

Or maybe they are selling them off in the US, as if they offered
both most people would jump on the newer model.
May be they are doing this to empty their shelves before they
do a Makita / Dolmar / stop producing gas saws, who knows.

621 is more expensive to make. No reason to switch for it until EPA allows the slightly "dirtier" 620.
ECHO won't stop making gas saws/engines unless they are banned worldwide
It's times bigger than Dolmar which simply could not afford full engine line-up overhaul given sales/returns afterwards.

 

[Ford3000]

621 is more expensive to make. No reason to switch for it until EPA allows the slightly "dirtier" 620.
ECHO won't stop making gas saws/engines unless they are banned worldwide
It's times bigger than Dolmar which simply could not afford full engine line-up overhaul given sales/returns afterwards.

Makita / Dolmar had a line up, all they had to do was keep making them,
why change what works. I believe they just wanted out because profits
were not big enough, and they are lead by eco warriors that wanted to
up their much larger battery manufacturing / sales division to include as
many tools as possible, including chainsaws.

 

[Ford3000]

I also believe gas / petrol equipment will be banned worldwide,
to private individuals, only commercial use will be allowed.
The rest of us will have to use electric tools around our homes,
and batter powered tools too.

 

[Piston Skirt]

Makita / Dolmar had a line up, all they had to do was keep making them,
why change what works. I believe they just wanted out because profits
were not big enough, and they are lead by eco warriors that wanted to
up their much larger battery manufacturing / sales division to include as
many tools as possible, including chainsaws.

There is a Stage5 now and approximately in 2026-2027 there will be Stage6 (that's new emission limits requiring new technologies).
Imagine making some 4-5 engines for brushcutters, 7-10 engines for chainsaws, multiply each by several millions of dollars (which have to come back from the profits of each model) and squeeze into 5 years to make all of this.
And all of this has to happen within a company that has less than 5% of worldwide OPE engine market.

 

[HighRidgePines]

I don't have access to the 621, but I have been incredibly pleased with my CS-620PW.

 

[Ford3000]

I don't have access to the 621, but I have been incredibly pleased with my CS-620PW.

That's my fear, there is a lot of good talk and video support
showing how well the 620 does, so am not sure the changes to
the porting on the 621 did not do away along with some power
or torque in favour of the emission gods.

No direct comparisons I can find between these two saws at work.

 

[Piston Skirt]

I don't have access to the 621, but I have been incredibly pleased with my CS-620PW.

Having cut, tested both and actually used one to secretly test on a team of loggers normally using 620s I can surely say none of them felt the difference in performance and just noted “quieter” exhaust note (that’s around 3dBs less).
I don’t think anyone here cares about that aspect though

 

[Ford3000]

Having cut, tested both and actually used one to secretly test on a team of loggers normally using 620s I can surely say none of them felt the difference in performance and just noted “quieter” exhaust note (that’s around 3dBs less).
I don’t think anyone here cares about that aspect though

So what's a ventilated piston, you mentioned the 621 has one.

Exhaust, that's the first thing I dig into, gutted my little CS-352 a few weeks back,
straight after its first start just to make sure all was well.

 

[Piston Skirt]

That's my fear, there is a lot of good talk and video support
showing how well the 620 does, so am not sure the changes to
the porting on the 621 did not do away along with some power
or torque in favour of the emission gods.

No direct comparisons I can find between these two saws at work.

There is more torque in 621 at the peak but less
At the peak power. In both cases the differences are within few percent, so a steady hand at sharpening, incorrect depth gauge or 1/16 of turn on any carb needle makes more difference.

 

[Ford3000]

There is more torque in 621 at the peak but less
At the peak power. In both cases the differences are within few percent, so a steady hand at sharpening, incorrect depth gauge or 1/16 of turn on any carb needle makes more difference.

All very true, or a banana stuffed in there.