The Stihl FS 74 is a professional-grade brushcutter/string trimmer designed for demanding vegetation management. This parts manual provides detailed exploded views, part numbers, and ordering information for all components of the FS 74 model, including the engine, drive shaft, cutting head, handle assembly, and safety features. It is intended for authorized service technicians and users performing maintenance or repairs to ensure proper part identification and unit integrity.
This manual is for the Stihl FS 74 brushcutter. Use only genuine Stihl replacement parts to maintain performance, safety, and warranty coverage.
| Warning Symbol | Meaning |
|---|---|
| ⚠️ | General hazard alert. Read manual before disassembly. |
| 🔥 | Fire hazard. Fuel system work requires empty tank in well-ventilated area. |
| ⚡ | Disconnect spark plug boot before servicing cutting attachments or engine. |
| 🛡️ | Always wear cut-resistant gloves and eye protection. |
WARNING! Using non-genuine parts may void warranty and compromise safety. Disconnect spark plug before any repair.
Major component groups of the Stihl FS 74.
Note: Refer to exploded diagrams for exact part relationships.
Parts list for the FS 74 engine (typically 2-stroke, 27.2cc).
| Part Number | Description | Qty |
|---|---|---|
| 0000 120 2005 | Cylinder complete | 1 |
| 0000 120 2103 | Piston assembly (with rings) | 1 |
| 0000 120 2201 | Crankshaft | 1 |
| 0000 120 2300 | Carburetor (Zama C1Q-S series) | 1 |
| 0000 120 2407 | Muffler with spark arrestor | 1 |
| 0000 120 2504 | Recoil starter assembly | 1 |
| 0000 120 2608 | Fan housing / cover | 1 |
Torque Specs: Cylinder head bolts: 10 Nm (88 in-lb). Spark plug: 20 Nm (15 ft-lb).
Components transmitting power from engine to cutting head.
| Part Number | Description |
|---|---|
| 0000 120 3001 | Flexible drive shaft complete |
| 0000 120 3109 | Gearbox housing (lower) |
| 0000 120 3206 | Bevel gear set (90°) |
| 0000 120 3303 | Output shaft with bearing |
| 0000 120 3400 | Clutch assembly (3-shoe) |
| 0000 120 3507 | Shaft tube / barrier |
Service Tip: Lubricate gearbox with Stihl gear grease (Part # 0000 120 4000) during reassembly.
Parts for the trimmer head and blade options.
| Part Number | Description |
|---|---|
| 0000 120 5005 | AutoCut C 2-2 head assembly |
| 0000 120 5102 | Trimmer line spool (pre-wound) |
| 0000 120 5209 | Blade adapter (M10x1.25 LH thread) |
| 0000 120 5306 | Deflector / guard |
| 0000 120 5403 | Retaining flange & nut |
WARNING! Ensure guard is correctly installed. Use only Stihl-approved cutting attachments.
Ergonomic and control components.
Loop Handle: Includes throttle trigger, throttle cable, lockout lever, and mounting clamp.
| Part Number | Description |
|---|---|
| 0000 120 6008 | Loop handle complete (with controls) |
| 0000 120 6105 | Throttle trigger assembly |
| 0000 120 6202 | Throttle cable (long) |
| 0000 120 6309 | Lockout lever / safety |
| 0000 120 6406 | Handle mounting clamp |
| 0000 120 6503 | Harness attachment rings (pair) |
Adjustment: Handle can be rotated for user preference. Tighten clamp securely.
Components for fuel delivery and storage.
| Part Number | Description |
|---|---|
| 0000 120 7001 | Fuel tank assembly (main housing) |
| 0000 120 7108 | Fuel cap with gasket |
| 0000 120 7205 | Fuel filter (sintered bronze) |
| 0000 120 7302 | Fuel line (3mm ID, yellow) |
| 0000 120 7409 | Primer bulb kit |
CAUTION! Use only clean, fresh fuel mix (50:1 with Stihl HP Ultra oil). Inspect lines for cracks.
Parts for engine spark generation and stopping.
| Part Number | Description |
|---|---|
| 0000 120 8004 | Ignition module (coil) |
| 0000 120 8101 | Spark plug (Bosch WSR 6 F) |
| 0000 120 8208 | Stop switch / kill switch |
| 0000 120 8305 | Wiring harness set |
| 0000 120 8402 | Spark plug boot & suppressor |
Gap: Spark plug gap 0.020" (0.5mm).
Common screws, nuts, washers, and clips.
| Part Number | Description | Size/Type |
|---|---|---|
| 0000 120 9007 | Screw, M5x20 (housing) | Torx T25 |
| 0000 120 9104 | Screw, M4x16 (covers) | Phillips |
| 0000 120 9201 | Lock nut, M10 (blade) | Left-hand thread |
| 0000 120 9308 | Washer, flat (8mm) | Spring steel |
| 0000 120 9405 | Circlip (for shaft) | 10mm |
| 0000 120 9502 | Vibration dampener (mount) | Rubber |
Note: Use correct torque. Replace lock nuts and washers; do not reuse.
Quick reference for major part numbers.
| Component | Main Part Number |
|---|---|
| Complete Engine (Short Block) | 0000 120 2000 |
| Drive Shaft Assembly | 0000 120 3001 |
| Gearbox Assembly | 0000 120 3100 |
| Loop Handle Assembly | 0000 120 6008 |
| Fuel Tank Assembly | 0000 120 7001 |
| Ignition Module | 0000 120 8004 |
| Complete Trimmer (FS 74) | 1141 400 0801 |
For the most current part numbers and availability, contact an authorized Stihl dealer.
How to order parts and warranty information.
Disclaimer: Part numbers subject to change. Illustrations may vary slightly from actual unit.
| Issue | Resolution |
|---|---|
| Wrong part received | Contact dealer with model and part number for exchange. |
| Part not in stock | Dealer can order from Stihl distribution center. |
| Installation question | Refer to Stihl FS 74 Service Manual or trained technician. |