 |
Return Create A Forum - Home |
 |
--------------------------------------------------------- |
|
Chainsaw Repair |
 |
https://chainsawrepair.createaforum.com |
|
--------------------------------------------------------- |
|
***************************************************** |
|
Return to: Echo |
|
***************************************************** |
|
#Post#: 89782-------------------------------------------------- |
|
Echo 621 620 |
|
By: Chainsawrepair Date: January 31, 2023, 6:34 am |
|
--------------------------------------------------------- |
|
Echo CS621 updated compared to CS620 |
|
Thought better save this info I read. |
|
Different parts are: |
|
Cylinder (different porting) |
|
Timing map (adjusted to porting) |
|
Piston (ventilated, different coating) |
|
Piston pin, clips (higher thermal durability) |
|
Pin bearing (higher thermal durability) |
|
Rings (different size, coating) |
|
Exhaust (different internal layout) |
|
Although it lost bit of peak power it also gained peak torque |
|
so in the end nobody can tell the difference. |
|
And the extra weight comes from the same updates the US 590 to |
|
620 got - metal inserts in starter housing, metric screws. |
|
Paper specs 13.8891lbs PHO |
|
https://www.echotools.com/en_us/products/chain-saws/chain-saw/cs-621sx_38 |
|
#Post#: 90305-------------------------------------------------- |
|
Re: Echo 621 620 |
|
By: Cut4fun Date: November 19, 2023, 7:38 am |
|
--------------------------------------------------------- |
|
Just saving these from different threads. Bore and stroke of 590 |
|
620 562 6100 |
|
check me on it |
|
6100 47mm X 35mm |
|
620 590 45mm x 37.6mm |
|
562 46mm x 36mm |
|
***************************************************** |
