Stihl model · engine series 1123
025 45.4 cc
- Chain
- .325″ · .063″ (US) / 3/8″ Picco (EU)
- Recommended bar
- 16–18″
- Mount
- 3005 / A074
Model displacement · family chain/bar fitment. Details & confidence ↓
Parts diagrams (19)
Browse saved diagrams & other models ↗491 parts entries · catalogue coverage: 021, 023, 025. Check the sheet’s variant and serial notes.
Model & family fitment specs
Displacement is specific to the 025 roster record. Chain, bar and mount are the published family fitment for engine series 1123; confirm the pitch, gauge and drive-link count stamped on your installed bar before ordering.
Chains & bars that fit the 025
Pitch & gauge .325″ · .063″ (US) / 3/8″ Picco (EU) · recommended bar 16–18″ · bar mount 3005 / A074 · round file 3/16" (4.8 mm)
Chain & bar by length
| Bar | Drive links | Shop |
|---|---|---|
| 16″ | 67 DL | Chain → Bar · 3005 → |
| 18″ | 74 DL | Chain → Bar · 3005 → |
Drive-link counts come from STIHL's saw-chain catalog. Bar searches include mount 3005 / A074; 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
Reference service specs
Reference-only service facts. STIHL revised parts by serial number, market, and production revision; verify against the saw label, IPL, or dealer parts lookup before ordering.
| Spark plug | Bosch WSR 6 F · NGK BPMR 7 A |
| Fuel filter | 0000 350 3500 |
| Air filter | 1123 120 1613 |
| Starter rope | 3 mm · 31.5–36″ |
| Guide coverage | 021 · 023 · 025 · MS 210 · MS 230 · MS 250 |
| Source | 2019 STIHL Technical Reference Guide · sourced |
- The 2019 guide lists MS 250 as current; confirm local production status for newer markets.
Factory tuning settings
| Idle speed | 2,800 rpm |
| LA screw (idle stop) | 1/4 turn |
| Confidence | reconstructed |
Screw figures are turns open from lightly seated. These are the figures every model in this family shares; an individual model page may be more specific. Matched on the base model number rather than this exact variant, so treat it as a starting point. 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 025
→ MS 250
Production, market and rarity are specific to this model’s roster record.
Related models in series 1123
Shared engine-family membership does not establish parts interchangeability.
Data confidence
Chain, bar, mount and displacement confidence comes from the shared 021/023/025 · MS 210/230/250 family research.
Something wrong or missing for the 025? Report a correction →