Stihl MS661 chain size

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

The chain for your Stihl MS661

Which bar is on your saw?

16" bar

Pitch
3/8"
Gauge
.050"
Drive links
60
  • Oregon D60
  • Same as Stihl 33RS3, Husqvarna H80
  • File 7/32"

18" bar

Pitch
3/8"
Gauge
.050"
Drive links
66
  • Oregon D66
  • Same as Stihl 33RS3, Husqvarna H80
  • File 7/32"

20" bar

Pitch
3/8"
Gauge
.050"
Drive links
72
  • Oregon D72
  • Same as Stihl 33RS3, Husqvarna H80
  • File 7/32"

Bar mount D025

Buy this chain

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Oregon D60, 60 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 Stihl MS661
Chain for each bar length
BarPitchGaugeDrive linksChain
16"3/8".050"60D60
18"3/8".050"66D66
20"3/8".050"72D72

The Stihl MS661 takes 3/8" pitch, .050" gauge chain. Drive links by bar length: 16" bar 60, 18" bar 66, 20" bar 72.

Stihl genuine part numbers

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

Stihl bar and chain part numbers
BarChain part no.Bar part no.Pitch / gaugeDrive links
20"33 RS3 723003 008 89213/8" / .050"72
20"36 RS3 723003 008 61213/8" / .063"72
22"36 RS3 763003 000 9425*3/8" / .063"76
25"33 RS3 843003 000 40303/8" / .050"84
25"36 RS3 843003 000 5231*3/8" / .063"84
28"33 RS3 913003 000 8838*3/8" / .050"91
28"36 RS3 913003 000 6038*3/8" / .063"91
30"36 RS3 983003 000 6041*3/8" / .063"98
32"46 RS 95**3003 000 7346*.404" / .063"95
32"33 RS3 1053003 000 8846*3/8" / .050"105
32"36 RS3 1053003 000 6046*3/8" / .063"105
36"46 RS 104**3003 000 7353*.404" / .063"105
36"33 RS3 1143003 000 8853*3/8" / .050"114
36"36 RS3 1143003 000 6053*3/8" / .063"114

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 a Stihl MS661 take?

The Stihl MS661 takes 3/8" pitch, .050" gauge chain. Drive links by bar length: 16" bar 60, 18" bar 66, 20" bar 72.

How many drive links is a Stihl MS661 chain?

It depends on the bar: 60 on a 16" bar, 66 on a 18" bar, 72 on a 20" bar. The bar length is usually printed near the mount.

What bar fits a Stihl MS661?

A bar with the D025 mount, in one of these lengths: 16", 18", 20".

Other saws with the same chain

All saws that take D60 All saws that take D66 All saws that take D72

Related Stihl saws

Every Stihl model