Description
Overview:
This is a genuine Stihl flywheel for professional clearing saws, engineered to restore smooth running and reliable ignition. Built from a robust aluminium alloy with cooling fins and integral magnets, it provides the rotating mass needed to stabilise engine speed while triggering the ignition module at the correct timing. Designed for heavy-duty two‐stroke applications, it is a direct-fit OEM replacement for selected Stihl brushcutters and clearing saws, including FS 400 and FS 450. Manufactured to Stihl specifications under MPN 4128 400 1200 (4128-400-1200 / 41284001200), it helps maintain starting performance, throttle response, and engine durability. Ideal for routine maintenance or when the original flywheel shows damage to fins, taper, or magnet strength.
Key Features:
- Genuine Stihl part for assured compatibility and reliability
- Precision-balanced to reduce vibration and protect bearings and crankshaft
- Aluminium alloy construction with corrosion resistance for long service life
- Integrated magnets for consistent ignition timing and dependable starting
- Correct crankshaft taper and location to maintain factory engine settings
- OEM fitment for straightforward installation using original fasteners
- Cooling fin design assists airflow around the cylinder and ignition module
- Helps cure symptoms from damaged fins, slipped key/taper, or weak spark
- Suitable for demanding forestry, landscaping, and grounds maintenance use
- Matches the performance requirements of high-power Stihl FS/FR series machines
Typical Applications:
Replacement of worn, cracked, or corroded flywheels on Stihl clearing saws used in forestry, landscaping, utilities, and estate maintenance. Useful when engines are hard to start, misfire under load, or exhibit timing issues due to a damaged taper or magnet. Supports routine overhauls to keep machines running smoothly during heavy grass, brush, and scrub clearance.
Also known as:
Engine flywheel, magneto flywheel, ignition rotor, rotor wheel, brushcutter flywheel, clearing saw flywheel, OEM flywheel for Stihl two‐stroke engines.
Fits Models:
FR 350, FR 450, FR 480, FR 480 C, FS 380, FS 400, FS 450, FS 480, FS 480 C
Alternate Part Numbers:
4128-400-1200, 41284001200
Product Specifications
| L&S Part No. | 4128 400 1200 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41284001200 |
| Unit of Sale | 1 |
| Applications | FR 350, FR 450, FR 480, FR 480 C, FR350, FR450, FR480, FR480C, FS 380, FS 400, FS 450, FS 480, FS 480 C, FS380, FS400, FS450, FS480, FS480C |
| Fits Brands | Stihl |
| Fits Models | FS400, FS450, FS480 | FR350, FR450, FR480, FR480C | SP 481 |
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