Stihl model · engine series 1121
MS 240 41.6 cc
- Chain
- .325″ · .050–.063″ (3/8″ option)
- Recommended bar
- 16–18″
- Mount
- 3003 / D025
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
Displacement is specific to the MS 240 roster record. Chain, bar and mount are the published family fitment for engine series 1121; confirm the pitch, gauge and drive-link count stamped on your installed bar before ordering.
Chains & bars that fit the MS 240
Pitch & gauge .325″ · .050–.063″ (3/8″ option) · recommended bar 16–18″ · bar mount 3003 / D025 · round file 3/16" (4.8 mm)
Chain & bar by length
| Bar | Drive links | Shop |
|---|---|---|
| 16″ | 67 DL | Chain → Bar · 3003 → |
| 18″ | 74 DL | Chain → Bar · 3003 → |
Drive-link counts come from STIHL's saw-chain catalog. Bar searches include mount 3003 / D025; still confirm the mount stamp, pitch, gauge and drive-link count on your installed bar before ordering.
Files, oil & sharpening
Suggested match: Oregon 95-series (95VPX) / 21–22 LPX. 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 | 2,800 rpm |
| Max speed | 13,000 rpm |
| L screw (low speed) | 1 turn |
| H screw (high speed) | 3/4 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 MS 240
EU/AU only; never US
Production, market and rarity are specific to this model’s roster record.
Related models in series 1121
Shared engine-family membership does not establish parts interchangeability.
Data confidence
Chain, bar, mount and displacement confidence comes from the shared 024 · 026 · MS 260 · MS 240 family research.
Something wrong or missing for the MS 240? Report a correction →