Description
Overview:
This is a genuine Stihl flywheel for small two‐stroke engines used in grass trimmers, brushcutters and Kombi/MultiSystem power units. Made from cast aluminium alloy with radial cooling fins, it stores rotational energy to keep the engine running smoothly and helps move cooling air across the cylinder. It also works with the ignition system to maintain consistent timing. Designed for a direct fit on Stihl machines including the FS 45 and FS 55, it replaces worn or damaged flywheels to restore reliable starting, stable idle and clean acceleration. As an OEM part (reference 4140 400 1202), it matches the original dimensions and balance, making it suitable for routine maintenance or repair where the original flywheel has cracked, lost fins or suffered keyway damage.
Key Features:
- Genuine Stihl OEM flywheel for assured compatibility and fit
- Durable cast aluminium alloy construction for long service life
- Precision-balanced to support smooth running and reduced vibration
- Integrated cooling fins to aid cylinder cooling and engine longevity
- Direct replacement for OEM No. 4140 400 1202 on listed models
- Designed to mount on the crankshaft taper of compatible engines
- Helps maintain reliable ignition timing and easier starting
- Suitable for everyday professional use and regular domestic trimming
Typical Applications:
Used to replace a damaged, cracked or unbalanced flywheel causing hard starting, misfiring, poor idle or excessive vibration. Common after blade strikes, debris impact or when fins break off. Ideal during engine overhauls, ignition troubleshooting, or routine servicing of Stihl trimmers and combi units to restore dependable performance and cooling airflow.
Also known as:
Replacement flywheel, trimmer flywheel, brushcutter flywheel, magneto rotor, ignition rotor, engine flywheel, fan wheel, cooling fan flywheel, rotor hub for small two‐stroke engines.
Fits Models:
FC 55 DZ, FS 38, FS 45, FS 46, FS 55, FS 55 C, FS 55 R, HL 45, KM 55, KM 55 C, KM 55 R, KM 55 RC, MM 55, MM 55 C, MM 55-Z, MM 55 C MultiSystem, MM 55-Z MultiSystem
Alternate Part Numbers:
4140-400-1202, 41404001202
Product Specifications
| L&S Part No. | 4140 400 1202 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41404001202 |
| Unit of Sale | 1 |
| Machine Type | Brushcutters, Trimmer Heads, Kombi Tools |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl OEM flywheel ensures compatibility and fit - Cast aluminium alloy construction for durability - Precision-balanced for smooth running and reduced vibration - Integrated cooling fins enhance cylinder cooling - Direct replacement for OEM No. 4140 400 1202 |
| Fits Models | FS38, FS45, FS46 | FS55, FS55C, FS55R | KM55, KM55C, KM55R, KM55RC | MM 55, MM 55 C MultiSystem | MM 55-Z MultiSystem | FC 55 DZ | HL45 |
