Echo CS490 chain size

Chainsaw drawing: the bar and chain are the parts this page is about

The chain for your Echo CS490

Which bar is on your saw?

Which chain is on it now?

Which chain is on it now?

16" bar

Pitch
.325"
Gauge
.050"
Drive links
66
  • Oregon H66
  • Same as Stihl 23RM3, Husqvarna H22, Husqvarna H22X
  • File 3/16"

16" bar

Pitch
.325"
Gauge
.058"
Drive links
66
  • Oregon J66
  • Same as Stihl 25RM3, Stihl 25RS3, Husqvarna H25
  • File 3/16"

18" bar

Pitch
.325"
Gauge
.050"
Drive links
72
  • Oregon H72
  • Same as Stihl 23RM3, Husqvarna H22, Husqvarna H22X
  • File 3/16"

18" bar

Pitch
.325"
Gauge
.058"
Drive links
72
  • Oregon J72
  • Same as Stihl 25RM3, Stihl 25RS3, Husqvarna H25
  • File 3/16"

20" bar

Pitch
.325"
Gauge
.050"
Drive links
78
  • Oregon H78
  • Same as Stihl 23RM3, Husqvarna H22, Husqvarna H22X
  • File 3/16"

Buy this chain

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Oregon H66, 66 drive links

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Check pitch, gauge and drive links on the listing before you order. How this works

All bar lengths for the Echo CS490
Chain for each bar length
BarPitchGaugeDrive linksChain
16".325".050"66H66
16".325".058"66J66
18".325".050"72H72
18".325".058"72J72
20".325".050"78H78

The Echo CS490 chain depends on the bar. 16" bar: .325", .050", 66 drive links; 16" bar: .325", .058", 66 drive links; 18" bar: .325", .050", 72 drive links; 18" bar: .325", .058", 72 drive links; 20" bar: .325", .050", 78 drive links.

Echo genuine part numbers

If you prefer the maker's own parts, these are the numbers to ask for at a dealer.

Echo bar and chain part numbers
BarChain part no.Bar part no.Pitch / gaugeDrive links
16"20BPX66CQ16F0AD3366, 16F0AD3366C.325" / .050"66
18"20BPX72CQ18F0AD3372, 18F0AD3372C.325" / .050"72
20"20BPX78CQ20F0AD3378, 20F0AD3378C.325" / .050"78

Check the chain on your saw

Drawing: pitch is the distance between three rivets divided by two
Pitch Measure across three rivets and divide by two. Common pitches are 1/4", .325", 3/8" and .404".
Drawing: gauge is the thickness of the drive link in the bar groove
Gauge The thickness of the drive link that rides in the bar groove: .043", .050", .058" or .063".
Drawing: count the drive links, the tabs under the chain
Drive links Lay the chain flat and count the tabs underneath. Mark one with a paint pen so you know where you started.
Find pitch and gauge from the number on a drive link
Type the number on a drive link
See all stamp numbers
Drive link stamp number to pitch and gauge
StampPitchGauge
113/4".122"
16.404".063"
18.404".080"
20.325".050"
21.325".058"
22.325".063"
251/4".050"
26.404".058"
27.404".063"
33.325".050"
34.325".058"
35.325".063"
50.404".050"
51.404".058"
52.404".063"
58.404".058"
59.404".063"
68.404".063"
723/8".050"
733/8".058"
753/8".063"
80.325" LP.043"
903/8" LP.043"
913/8" LP.050"
95.325".050"

Questions people ask

What size chain does an Echo CS490 take?

The Echo CS490 chain depends on the bar. 16" bar: .325", .050", 66 drive links; 16" bar: .325", .058", 66 drive links; 18" bar: .325", .050", 72 drive links; 18" bar: .325", .058", 72 drive links; 20" bar: .325", .050", 78 drive links.

How many drive links is an Echo CS490 chain?

It depends on the bar: 66 on a 16" bar, 66 on a 16" bar, 72 on a 18" bar, 72 on a 18" bar, 78 on a 20" bar. The bar length is usually printed near the mount.

Can I use a chain with the same length but different pitch?

No. Pitch and gauge have to match the bar and sprocket, and the drive link count has to match the bar. A chain that is off on any of the three will not fit or run safely.

Other saws with the same chain

All saws that take H66 All saws that take J66 All saws that take H72

Related Echo saws

Every Echo model