Stihl model · engine series 1120
009 36.6 cc
- Chain
- 3/8″ Picco · .050″
- Recommended bar
- 12–16″
- Mount
- 3005 / A074
Model displacement · family chain/bar fitment. Details & confidence ↓
Parts diagrams (19)
Browse saved diagrams & other models ↗364 parts entries · catalogue coverage: 009. Check the sheet’s variant and serial notes.
Service manuals
Read the instructions, then switch to parts diagrams without losing your place.
Workshop manual · English · 52 pages
009 / 010 / 011
Edition not dated
The foreword covers 010 through serial 7 900 000 and later machines unless superseded by technical bulletins; it also covers 009 and 011. Check the configuration shown. Does not establish coverage for 012 or every later variant.
Read service manual →Model & family fitment specs
Displacement is specific to the 009 roster record. Chain, bar and mount are the published family fitment for engine series 1120; confirm the pitch, gauge and drive-link count stamped on your installed bar before ordering.
Chains & bars that fit the 009
Pitch & gauge 3/8″ Picco · .050″ · recommended bar 12–16″ · bar mount 3005 / A074 · round file 5/32" (4.0 mm)
Chain & bar by length
| Bar | Drive links | Shop |
|---|---|---|
| 12″ | 44 DL | Chain → Bar · 3005 → |
| 14″ | 50 DL | Chain → Bar · 3005 → |
| 16″ | 55 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 90/91-series (e.g. 91PX). 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 | 10,500 rpm |
| L screw (low speed) | 1 turn |
| H screw (high speed) | 1 turn |
| Confidence | reconstructed |
Screw figures are turns open from lightly seated. 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 009
36.6 cc; sold as "Mini Boss" in the US
Production, market and rarity are specific to this model’s roster record.
Related models in series 1120
Shared engine-family membership does not establish parts interchangeability.
Data confidence
Chain, bar, mount and displacement confidence comes from the shared 009 · 010 · 011 · 012 family research.
Something wrong or missing for the 009? Report a correction →