Stihl model · engine series 1111

051 ≈89 cc

Chain: .404″ / 3/8″ · .063″
Recommended bar: 25–42″
Mount: 3002 / E099 / D033 / E031 / E086

Model displacement · family chain/bar fitment. Details & confidence ↓

Parts diagrams (14)

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431 parts entries · catalogue coverage: 050, 051. Check the sheet’s variant and serial notes.

Model & family fitment specs

Actual displacement≈89 cc

Guide bar25–42″

Chain.404″ / 3/8″ · .063″

Bar mount3002 / E099 / D033 / E031 / E086

Displacement is specific to the 051 roster record. Chain, bar and mount are the published family fitment for engine series 1111; confirm the pitch, gauge and drive-link count stamped on your installed bar before ordering.

displacement · approxbar real-world · estimatedbar mount · sourcedchain · sourceddates · sourcedvariants · sourced

Chains & bars that fit the 051

Pitch & gauge .404″ / 3/8″ · .063″ · recommended bar 25–42″ · bar mount 3002 / E099 / D033 / E031 / E086 · round file 7/32" (5.5 mm)

Replacement chain → Guide bar · 3002 →

Chain & bar by length

Bar	Drive links	Shop
25″	80 DL	Chain → Bar · 3002 →
30″	91 DL	Chain → Bar · 3002 →
36″	108 DL	Chain → Bar · 3002 →
41″	123 DL	Chain → Bar · 3002 →

Drive-link counts come from STIHL's saw-chain catalog. Bar searches include mount 3002; still confirm the mount stamp, pitch, gauge and drive-link count on your installed bar before ordering.

Files, oil & sharpening

Round file 7/32" (5.5 mm) → Bar & chain oil → 2-in-1 sharpener →

Suggested match: Oregon 27/59-series. Confirm the drive-link count for your exact bar length before ordering. These are equivalent aftermarket (Oregon) chains, not genuine STIHL chain — STIHL sells its own chain through its dealer network, and we're not affiliated with STIHL. New to fitment? See the bar-mount identification guide and chain & cutter guide.

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Service & tuning

Factory tuning settings

Idle speed	2,000 rpm
Max speed	10,000 rpm
H screw (high speed)	1 turn
Confidence	sourced

Screw figures are turns open from lightly seated. Set the final mixture by ear and tachometer against the machine in front of you — running a two-stroke lean to hit a published number is how pistons get scored.

About the 051

Production1972–85

MarketGlobal

RarityCommon (vintage)

Engine family1111

Family era1968–1986

Pro felling, ~89 cc

Production, market and rarity are specific to this model’s roster record.

Shared engine-family membership does not establish parts interchangeability.

Data confidence

Chain, bar, mount and displacement confidence comes from the shared 050 · 051 · 075 · 076 family research.