Stihl engine series 1123 · HO · in production
021/023/025 · MS 210/230/250
Chains & bars that fit the 021/023/025 · MS 210/230/250
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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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.
Models in this family (6)
1,840 part numbers across 70 exploded views — the Diagrams column goes straight to them.
| Model | Years | Market | Rarity | Diagrams | Notes |
|---|---|---|---|---|---|
| 021 35.2 cc | 1990–02 | Global | Common | 19 | → MS 210 |
| 023 / 023 C / 023 L 40.2 cc | 1990–02 | Global/EU | Common | 19 | → MS 230 |
| 025 45.4 cc | 1991–02 | Global | Very Common | 19 | → MS 250 |
| MS 210 35.2 cc | 2002–08 | Global | Very Common | 17 | |
| MS 230 40.2 cc | 2002–12 | Global | Very Common | 17 | |
| MS 250 45.4 cc | 2002→now | Global | Current / Extremely Common | 17 | Benchmark; one of most-sold Stihls ever — still sold |
Service bulletins (25)
Running changes and fixes STIHL published for this engine family.
- TI 54/2007 Carburetor
- TI 46/2006 Engine housing; Chain Sprocket
- TI 5/2005 Sprocket (clutch drum), worm;Flywheel (ErgoStart);Muffler
- TI 32/2004 STIHL MS 230 C, MS 250 C with ErgoStart; Starting the chainsaw; Carburetor; Ignition module; Cable harness; Engine housing; Handlebar; Service note; Spare parts; Summary
- TI 36/2003 Technical description; Specifications; Starting th
- TI 17/2003 Carburetor; Grommet; Handle housing; Service tool
- TI 8/2002 Optimized Connection: Engine Housing - Connector -
- TI 5/2002 New Sales Designations for 021, 023 and 025; Uprat
- TI 34/2001 Carburetor
- TI 42/2000 Clutch (cover washer)
- TI 13/2000 Displacement increased
- TI 11/1999 021 C, 023 C, 025 C: ElastoStart
- TI 21/1998 General: Machine Numbering
- TI 8/1998 021, 023, 025: Carburetors
- TI 28/1997 023 C, 025: Cylinder (023 C); Carburetor; Grommet;
- TI 13/1997 021, 023 L: Crank drive (crankshaft; piston; conne
- TI 38/1996 Fleece replaces flocked wire cloth filter
- TI 24/1996 Quick chain tensioner; easy start system; oil seal
- TI 29/1995 Hand guard; carburetor; engine housing; chain spro
- TI 17/1995 023 L: New low-noise version
- TI 42/1994 023 C: New version with quick chain tensioner
- TI 38/1994 New air filter
- TI 26/1994 Chain brake; rewind starter
- TI 13/1994 Filler cap; hand guard; carburetor; muffler
- TI 10/1994 Easy start system
Data confidence
Verify anything tagged estimated or approx against STIHL spec sheets.
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