Stihl model · engine series 1127
MS 390 64.1 cc
64.1 cc; end date varies by market (2009–2012)
The production, market and rarity details above are specific to the MS 390 roster record. The displacement below is specific to this roster record. The chain, bar and mount are the published family fitment for engine series 1127; confirm the pitch, gauge and drive-link count stamped on your installed bar before ordering.
Model & family fitment specs
Chains & bars that fit the MS 390
Pitch & gauge 3/8″ · .050–.063″ · recommended bar 16–20″ · bar mount 3003 / D025 · round file 7/32" (5.5 mm)
Chain & bar by length
| Bar | Drive links | Shop |
|---|---|---|
| 16″ | 60 DL | Chain → Bar · 3003 → |
| 18″ | 66 DL | Chain → Bar · 3003 → |
| 20″ | 72 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 72/73/75 EXL. 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 | 1127 120 1621 (compensating) · 1127 120 1611 (non-compensating) |
| Starter rope | 3.5 mm · 38″ |
| Guide coverage | 029 · 039 · MS 290 · MS 310 · MS 390 |
| Source | 2019 STIHL Technical Reference Guide · sourced |
- 029/039 air-filter variant depends on compensating vs non-compensating carb setup.
Factory tuning settings
| Idle speed | 2,800 rpm |
| Max speed | 13,000 rpm |
| Confidence | sourced |
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.
Parts diagrams (13)
346 part numbers. The catalogue files these under the MS 290, MS 310, MS 390, one bill of material covering this model.
Related models in series 1127
Data confidence
Chain, bar, mount and displacement confidence comes from the shared 029/039 · MS 290/310/390 family research.
Something wrong or missing for the MS 390? Report a correction →