Opuladuo 2PC 20 Inch Chainsaw Chain for Echo CS-590-20AA / Echo CS 590 Chainsaw- 72LPX70CQ – 3/8" – .050" – 70 DL

20-inch replacement chain fitment for Echo CS-590-20AA / CS-590

This Opuladuo 2-piece 20 inch chainsaw chain set is intended for the Echo CS-590-20AA and Echo CS-590 chainsaw when the saw is running the matching 20-inch bar setup. The listed chain spec is 3/8” pitch, .050” gauge, and 70 drive links, which is the key combination you need to confirm before ordering.

Will this chain fit your saw?

To fit correctly, a chainsaw chain has to match all four basic bar-and-chain specs:

• Bar length: 20”
• Pitch: 3/8”
• Gauge: .050”
• Drive-link count: 70 DL

If your Echo saw uses a 20-inch bar and the current chain or bar markings show 3/8 pitch, .050 gauge, and 70 drive links, this chain should be the correct fit.

Compatible models and reference numbers from the original listing:

• Echo CS-590-20AA
• Echo CS-590

Replaces part numbers:

• 72LPX70CQ
• 72LPX070G
• D70
• E70

Package includes:

• 2Pcs 20-Inch Chain

A quick note on fitment: the model name alone is helpful, but it is still best to confirm the chain size on your existing bar or chain. Some saws can be used with different bar setups, so matching the exact pitch, gauge, and drive-link count is the safest way to avoid ordering the wrong chain.

Replacing the chain

Before starting, make sure the saw is fully off and cannot start accidentally. Wear gloves when handling the chain.

1. Let the saw cool, then loosen the side cover and back off the chain tension.
2. Remove the side cover and lift the old chain off the bar and drive sprocket.
3. Clean the bar groove, oil hole, and clutch cover area so the new chain can run smoothly.
4. Install the new chain around the drive sprocket and along the bar, making sure the cutting teeth face the correct direction on the top of the bar.
5. Refit the side cover, then adjust chain tension until the chain sits snugly in the bar groove but can still be pulled around by hand with a gloved hand.
6. Tighten the bar nuts securely, then recheck tension after a short test run since a new chain can stretch slightly during initial use.

If the chain will not tension correctly, do not force it. Recheck that the bar is a 20-inch setup using 3/8” pitch, .050” gauge, and 70 drive links.

Keeping it sharp

A sharp chain cuts faster, puts less strain on the saw, and is generally safer to use.

• Keep the chain out of dirt. Even one accidental touch into soil can dull cutters very quickly.
• Maintain proper chain tension. A loose chain can derail; an overly tight chain can wear the bar and sprocket faster.
• Check chain lubrication often. If the chain looks dry or the bar is getting unusually hot, inspect oil flow before continuing.

It is also a good idea to rotate between the two included chains. That way, you can keep one sharpened and ready while the other is in use.

FAQ

Will this fit every Echo CS-590?

Not automatically. It fits Echo CS-590-20AA and Echo CS-590 only when the saw is equipped with a 20” bar using 3/8” pitch, .050” gauge, and 70 drive links.

What do 72LPX70CQ, 72LPX070G, D70, and E70 mean?

These are replacement reference part numbers listed for this chain. If your current chain or parts information matches one of those numbers, this chain is intended as the replacement.