Stihl MS251 Chain & Bar Guide

45.6cc

Stihl MS251← Change saw

Specs

Pitch .325"must match bar + sprocket

Gauge .050", .063"must match bar groove

Bar range 16"–18"cutting length range

Sprocket 7-tooth rim.325" pitch

Drive links by bar length

16"66 DL18"74 DL

Replaces MS250. Farm and ranch saw. Uses .325" pitch — not interchangeable with 3/8" saws.

Wrong pitch, gauge, or drive link count can throw a chain or damage your saw. Check your saw's markings before ordering. More info

Source: Stihl service manual; Oregon cross-reference guideLast verified: 2026-04-21

Common setup

A typical Stihl MS251 setup

For general firewood: 18" Oregon SpeedCut Pro-Lite (.325") bar with Husqvarna H30 66 semi-chisel chain. Both match this saw's pitch, gauge, and drive-link count.

Bar

CompatibleOregon

SpeedCut Pro-Lite (.325")

140SDEA040

18".325".050"74 DL

Amazon↗

Chain

CompatibleHusqvarna

H30 66

H30-66E

.325".050"66 DL

Amazon↗

For dirty wood, hardwood cutting, milling, or different bar lengths, see the full list below.

All compatible guide bars8

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.050" gauge

16"

CompatibleStihl

Rollomatic E (.325")

3003-000-5209

16".325".050"66 DL10-tooth sprocket

Stihl OEM .325" bar — fits MS251/261/271/291. Verify part number.

CompatibleOregon

SpeedCut Pro-Lite (.325")

120SDEA040

16".325".050"66 DL10-tooth sprocket

Oregon aftermarket .325" bar — fits Stihl large-mount saws. Verify part number.

18"

CompatibleStihl

Rollomatic E (.325")

3003-000-5213

18".325".050"74 DL10-tooth sprocket

Stihl OEM .325" bar — fits MS261/271/291. Verify part number.

CompatibleOregon

SpeedCut Pro-Lite (.325")

140SDEA040

18".325".050"74 DL10-tooth sprocket

Oregon aftermarket .325" bar — fits Stihl large-mount saws. Verify part number.

Amazon↗

.063" gauge

16"

CompatibleStihl

Rollomatic E (.325" .063")

3003-000-5709

16".325".063"66 DL10-tooth sprocket

Stihl OEM .325" .063" heavy-gauge bar — fits MS261 C-M and MS291. Verify part number.

Amazon↗

CompatibleOregon

PowerCut (.325" .063")

120TXLBA040

16".325".063"66 DL10-tooth sprocket

Oregon .325" .063" bar for Stihl large-mount saws. Verify part number.

18"

CompatibleStihl

Rollomatic E (.325" .063")

3003-000-5713

18".325".063"74 DL10-tooth sprocket

Stihl OEM .325" .063" heavy-gauge bar. Verify part number.

CompatibleOregon

PowerCut (.325" .063")

140TXLBA040

18".325".063"74 DL10-tooth sprocket

Oregon .325" .063" bar for Stihl large-mount saws. Verify part number.

Amazon↗

All compatible chains15

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.050" gauge chains

For 16" bar – 66 drive links

CompatibleStihl

26RS3 66

3605-000-0066

.325".050"66 DLFull chisel

RS3 (Rapid Super 3)

Full chisel .325" .050" — fits 16" bar on MS251/261/271/291 and Husqvarna 450.

CompatibleStihl

26RM3 66

3636-000-0066

.325".050"66 DLSemi chisel

RM3 (Rapid Micro 3)

Semi chisel .325" .050" — stays sharp longer in dirty/frozen wood. Fits 16" bar.

CompatibleOregon

21BPX 66

21BPX066G

.325".050"66 DLSemi chisel

BPX (semi chisel low-kickback)

Oregon semi chisel .325" .050" — fits 16" bar on MS261/271/291 and Husqvarna 450.

CompatibleOregon

21LGX 66

21LGX066G

.325".050"66 DLFull chisel

LGX (full chisel low-kickback)

Oregon full chisel .325" .050" — fast cut for clean wood. Fits 16" bar.

Amazon↗

CompatibleHusqvarna

H30 66

H30-66E

.325".050"66 DLSemi chisel

H30 semi chisel

Husqvarna branded .325" .050" semi chisel — fits 16" bar on 450 Rancher and Stihl .325" saws.

Amazon↗

For 18" bar – 74 drive links

CompatibleStihl

26RS3 74

3605-000-0074

.325".050"74 DLFull chisel

RS3 (Rapid Super 3)

Full chisel .325" .050" — fits 18" bar on MS261/271/291.

CompatibleStihl

26RM3 74

3636-000-0074

.325".050"74 DLSemi chisel

RM3 (Rapid Micro 3)

Semi chisel .325" .050" — stays sharp longer in dirty/frozen wood. Fits 18" bar.

Amazon↗

CompatibleOregon

21BPX 74

21BPX074G

.325".050"74 DLSemi chisel

BPX (semi chisel low-kickback)

Oregon semi chisel .325" .050" — fits 18" bar.

CompatibleOregon

21LGX 74

21LGX074G

.325".050"74 DLFull chisel

LGX (full chisel low-kickback)

Oregon full chisel .325" .050" — fits 18" bar.

CompatibleHusqvarna

H30 74

H30-74E

.325".050"74 DLSemi chisel

H30 semi chisel

Husqvarna branded .325" .050" semi chisel — fits 18" bar.

CompatibleHusqvarna

H30 72

H30-72

.325".050"72 DLSemi chisel

H30 semi chisel

Husqvarna .325" .050" 72DL — fits 18" bar on 440/445/450/545. Different drive link count from H30-74E.

.063" gauge chains

For 16" bar – 66 drive links

CompatibleStihl

26RS 66

3605-000-0066-063

.325".063"66 DLFull chisel

RS (Rapid Super)

Full chisel .325" .063" heavy gauge — fits 16" bar. Used on MS261 C-M and higher-spec .325" saws.

CompatibleOregon

22LGX 66

22LGX066G

.325".063"66 DLFull chisel

LGX (full chisel)

Oregon full chisel .325" .063" — fits 16" bar. Professional-grade heavy gauge.

For 18" bar – 74 drive links

CompatibleStihl

26RS 74

3605-000-0074-063

.325".063"74 DLFull chisel

RS (Rapid Super)

Full chisel .325" .063" heavy gauge — fits 18" bar.

Amazon↗

CompatibleOregon

22LGX 74

22LGX074G

.325".063"74 DLFull chisel

LGX (full chisel)

Oregon full chisel .325" .063" — fits 18" bar.

Amazon↗

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