Overview
Built for Echo CS-590-20AA chainsaws, this replacement chain delivers consistent cuts and reliable durability at a fraction of OEM cost. Bundled as 2 chains, giving you a ready spare. Chains wear down over time from regular use, and a fresh chain cuts faster and safer than a dull one.
Key specifications
- Bar length: 20”
- Pitch: 3/8”
- Gauge: .050”
- Drive links: 70 drive links
- Quantity: 2 chains per pack
Compatibility
This chain is designed to fit Echo CS-590-20AA. Check your owner’s manual or the existing chain’s markings to verify pitch, gauge, and drive link count before ordering.
Installation notes
Begin by shutting off the saw and disconnecting the power source. Loosen the bar-mounting fasteners and remove the side cover to access the chain. Slide the worn chain off, seat the replacement around the sprocket and into the bar groove with cutters pointing in the direction of rotation. Tighten the tensioning screw until there is slight play but no droop, then secure the cover.
Common questions
Q: Will this 2-pack 20 inch chain fit my Echo CS-590-20AA, or do I need to match anything besides the bar length?
Yes, this chain is made to fit the Echo CS-590-20AA with a 20 inch bar and 3/8 pitch, so it matches the setup that model commonly uses. It’s still a good idea to verify the markings on your current bar or chain before installing, since some saws are occasionally converted to a different chain setup.
Q: I have an Echo CS-590-20AA and want to swap to this new chain myself. Do I need to do anything special when installing it?
Make sure the cutters on the top of the bar face forward toward the bar nose, then set the chain tension so it sits snug in the bar groove but can still be pulled around by hand with gloves on. After a few minutes of cutting, recheck the tension because a new chain will usually stretch slightly during break-in.
Q: Since this is a 2PC 20 inch chainsaw chain set, how should I maintain the second chain while using the first one on my Echo CS-590-20AA?
A good practice is to rotate between the two chains so you can sharpen one while running the other, which helps reduce downtime and wear on the bar. Keep both chains clean, properly oiled, and touched up with the correct 3/8 pitch filing setup so they cut straight and don’t force the saw.
