Stihl model · engine series 1109

090 G 106 cc

Chain: .404″ · .063–.080″
Recommended bar: 36–50″
Mount: Proprietary mount

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

Parts diagrams (0)

Parts diagrams for this model are not available in this catalogue yet. Specifications remain available; diagrams from other models are not substituted.

Model & family fitment specs

Actual displacement106 cc

Guide bar36–50″

Chain.404″ · .063–.080″

Bar mountProprietary mount

Displacement is specific to the 090 G roster record. Chain, bar and mount are the published family fitment for engine series 1109; confirm the pitch, gauge and drive-link count stamped on your installed bar before ordering.

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

Chains & bars that fit the 090 G

Pitch & gauge .404″ · .063–.080″ · recommended bar 36–50″ · bar mount Proprietary / nonstandard mount · round file 7/32" (5.5 mm)

Replacement chain → Guide-bar link withheld: proprietary / nonstandard mount.

Chain & bar by length

Bar	Drive links	Shop
36″	108 DL	Chain →
41″	123 DL	Chain →
47″	138 DL	Chain →

Drive-link counts come from STIHL's saw-chain catalog. Guide-bar links are withheld for proprietary / nonstandard mount; 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.

Some links earn us a commission. It never changes the specs or what we recommend.

Service & tuning

No applicable service or tuning figures are available for this model yet.

About the 090 G

Production1969–85

MarketEU/Export

RarityCollectable

Engine family1109

Family era1964–1985

106 cc stock (070 engine); ran the longest bars of any Stihl

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 Contra G · 090 G (gear drive) family research.