← All engine families

Stihl engine series 1101 · VT

BL

Displacement125 cc
Guide bar18–24″
Chain.404″ (≈)
Bar mountProprietary mount
Production1952–1959

Chains & bars that fit the BL

Pitch & gauge .404″ (≈) · recommended bar 18–24″ · bar mount Proprietary / nonstandard mount · round file 7/32" (5.5 mm)

Replacement chain → Guide-bar link withheld: proprietary / nonstandard mount.
Files, oil & sharpening

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.

Models in this family (1)

ModelYearsMarketRarityNotes
BL 125 cc 1952–59 EU Rare 125 cc; two-man saw convertible to one-man (also sold as BG 41)

Data confidence

Provenance for this family's figures — verify anything tagged estimated, approx, or stale-risk against STIHL spec sheets.

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

Something here wrong or missing for the BL? Report a correction →